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authorwolfbeast <mcwerewolf@wolfbeast.com>2020-02-23 14:41:40 +0100
committerwolfbeast <mcwerewolf@wolfbeast.com>2020-04-14 12:57:13 +0200
commitaf69cb07db0d810a1a1a507b890e6beb23dc421c (patch)
tree2d52b9d0ac0dc9c48cd91631b7431b90d6703be6
parentdc4695406f02e26009f5f54a858344911f1aa404 (diff)
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Revert #1137 - Remove unboxed arrays
- accounting for removal of watch()/unwatch() - updated for intermediate code changes.
-rw-r--r--js/src/builtin/ModuleObject.cpp2
-rw-r--r--js/src/frontend/BytecodeEmitter.cpp17
-rw-r--r--js/src/frontend/BytecodeEmitter.h2
-rw-r--r--js/src/gc/Marking.cpp2
-rw-r--r--js/src/jit/AliasAnalysisShared.cpp4
-rw-r--r--js/src/jit/BaselineCacheIR.cpp16
-rw-r--r--js/src/jit/BaselineCompiler.cpp12
-rw-r--r--js/src/jit/BaselineCompiler.h1
-rw-r--r--js/src/jit/BaselineIC.cpp213
-rw-r--r--js/src/jit/BaselineIC.h68
-rw-r--r--js/src/jit/BaselineInspector.cpp2
-rw-r--r--js/src/jit/BaselineInspector.h2
-rw-r--r--js/src/jit/CacheIR.cpp9
-rw-r--r--js/src/jit/CacheIR.h5
-rw-r--r--js/src/jit/CodeGenerator.cpp381
-rw-r--r--js/src/jit/CodeGenerator.h4
-rw-r--r--js/src/jit/IonBuilder.cpp201
-rw-r--r--js/src/jit/IonBuilder.h12
-rw-r--r--js/src/jit/IonCaches.cpp135
-rw-r--r--js/src/jit/Lowering.cpp46
-rw-r--r--js/src/jit/Lowering.h4
-rw-r--r--js/src/jit/MCallOptimize.cpp81
-rw-r--r--js/src/jit/MIR.cpp45
-rw-r--r--js/src/jit/MIR.h188
-rw-r--r--js/src/jit/MOpcodes.h4
-rw-r--r--js/src/jit/MacroAssembler.cpp35
-rw-r--r--js/src/jit/MacroAssembler.h5
-rw-r--r--js/src/jit/Recover.cpp2
-rw-r--r--js/src/jit/ScalarReplacement.cpp5
-rw-r--r--js/src/jit/SharedIC.cpp9
-rw-r--r--js/src/jit/VMFunctions.cpp27
-rw-r--r--js/src/jit/VMFunctions.h6
-rw-r--r--js/src/jit/shared/LIR-shared.h90
-rw-r--r--js/src/jit/shared/LOpcodes-shared.h4
-rw-r--r--js/src/jsapi.h8
-rw-r--r--js/src/jsarray.cpp520
-rw-r--r--js/src/jsarray.h41
-rw-r--r--js/src/jsfriendapi.cpp2
-rw-r--r--js/src/jsobj.cpp47
-rw-r--r--js/src/jsobjinlines.h2
-rw-r--r--js/src/jsstr.cpp6
-rw-r--r--js/src/jsstr.h2
-rw-r--r--js/src/shell/js.cpp4
-rw-r--r--js/src/vm/Interpreter-inl.h2
-rw-r--r--js/src/vm/Interpreter.cpp16
-rw-r--r--js/src/vm/JSONParser.cpp4
-rw-r--r--js/src/vm/NativeObject-inl.h32
-rw-r--r--js/src/vm/NativeObject.h15
-rw-r--r--js/src/vm/ObjectGroup.cpp103
-rw-r--r--js/src/vm/ObjectGroup.h10
-rw-r--r--js/src/vm/Opcodes.h12
-rw-r--r--js/src/vm/ReceiverGuard.cpp8
-rw-r--r--js/src/vm/Stack.cpp2
-rw-r--r--js/src/vm/Stack.h2
-rw-r--r--js/src/vm/TypeInference.cpp6
-rw-r--r--js/src/vm/TypeInference.h4
-rw-r--r--js/src/vm/UnboxedObject-inl.h663
-rw-r--r--js/src/vm/UnboxedObject.cpp816
-rw-r--r--js/src/vm/UnboxedObject.h207
59 files changed, 3543 insertions, 630 deletions
diff --git a/js/src/builtin/ModuleObject.cpp b/js/src/builtin/ModuleObject.cpp
index 575bab0b0..b275cb968 100644
--- a/js/src/builtin/ModuleObject.cpp
+++ b/js/src/builtin/ModuleObject.cpp
@@ -927,7 +927,7 @@ ModuleObject::evaluate(JSContext* cx, HandleModuleObject self, MutableHandleValu
ModuleObject::createNamespace(JSContext* cx, HandleModuleObject self, HandleObject exports)
{
MOZ_ASSERT(!self->namespace_());
- MOZ_ASSERT(exports->is<ArrayObject>());
+ MOZ_ASSERT(exports->is<ArrayObject>() || exports->is<UnboxedArrayObject>());
RootedModuleNamespaceObject ns(cx, ModuleNamespaceObject::create(cx, self));
if (!ns)
diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index f4574b248..8cd06feac 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -6495,8 +6495,8 @@ ParseNode::getConstantValue(ExclusiveContext* cx, AllowConstantObjects allowObje
}
MOZ_ASSERT(idx == count);
- ArrayObject* obj = ObjectGroup::newArrayObject(cx, values.begin(), values.length(),
- newKind, arrayKind);
+ JSObject* obj = ObjectGroup::newArrayObject(cx, values.begin(), values.length(),
+ newKind, arrayKind);
if (!obj)
return false;
@@ -9623,7 +9623,7 @@ BytecodeEmitter::emitCallOrNew(ParseNode* pn, ValueUsage valueUsage /* = ValueUs
return false;
}
- if (!emitArray(args, argc))
+ if (!emitArray(args, argc, JSOP_SPREADCALLARRAY))
return false;
if (optCodeEmitted) {
@@ -10138,11 +10138,11 @@ BytecodeEmitter::emitArrayLiteral(ParseNode* pn)
}
}
- return emitArray(pn->pn_head, pn->pn_count);
+ return emitArray(pn->pn_head, pn->pn_count, JSOP_NEWARRAY);
}
bool
-BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count)
+BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count, JSOp op)
{
/*
@@ -10153,6 +10153,7 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count)
* to avoid dup'ing and popping the array as each element is added, as
* JSOP_SETELEM/JSOP_SETPROP would do.
*/
+ MOZ_ASSERT(op == JSOP_NEWARRAY || op == JSOP_SPREADCALLARRAY);
uint32_t nspread = 0;
for (ParseNode* elt = pn; elt; elt = elt->pn_next) {
@@ -10173,7 +10174,7 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count)
// For arrays with spread, this is a very pessimistic allocation, the
// minimum possible final size.
- if (!emitUint32Operand(JSOP_NEWARRAY, count - nspread)) // ARRAY
+ if (!emitUint32Operand(op, count - nspread)) // ARRAY
return false;
ParseNode* pn2 = pn;
@@ -11314,8 +11315,8 @@ BytecodeEmitter::setSrcNoteOffset(unsigned index, unsigned which, ptrdiff_t offs
/* Maybe this offset was already set to a four-byte value. */
if (!(*sn & SN_4BYTE_OFFSET_FLAG)) {
/* Insert three dummy bytes that will be overwritten shortly. */
- if (MOZ_UNLIKELY(notes.length() + 3 > MaxSrcNotesLength)) {
- ReportAllocationOverflow(cx);
+ if (MOZ_UNLIKELY(notes.length() + 3 > MaxSrcNotesLength)) {
+ ReportAllocationOverflow(cx);
return false;
}
jssrcnote dummy = 0;
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h
index 8ad409c11..77f77599c 100644
--- a/js/src/frontend/BytecodeEmitter.h
+++ b/js/src/frontend/BytecodeEmitter.h
@@ -543,7 +543,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter
MOZ_MUST_USE bool emitAtomOp(ParseNode* pn, JSOp op);
MOZ_MUST_USE bool emitArrayLiteral(ParseNode* pn);
- MOZ_MUST_USE bool emitArray(ParseNode* pn, uint32_t count);
+ MOZ_MUST_USE bool emitArray(ParseNode* pn, uint32_t count, JSOp op);
MOZ_MUST_USE bool emitArrayComp(ParseNode* pn);
MOZ_MUST_USE bool emitInternedScopeOp(uint32_t index, JSOp op);
diff --git a/js/src/gc/Marking.cpp b/js/src/gc/Marking.cpp
index 262fc8cbc..a206a8762 100644
--- a/js/src/gc/Marking.cpp
+++ b/js/src/gc/Marking.cpp
@@ -2504,6 +2504,8 @@ js::TenuringTracer::moveObjectToTenured(JSObject* dst, JSObject* src, AllocKind
InlineTypedObject::objectMovedDuringMinorGC(this, dst, src);
} else if (src->is<TypedArrayObject>()) {
tenuredSize += TypedArrayObject::objectMovedDuringMinorGC(this, dst, src, dstKind);
+ } else if (src->is<UnboxedArrayObject>()) {
+ tenuredSize += UnboxedArrayObject::objectMovedDuringMinorGC(this, dst, src, dstKind);
} else if (src->is<ArgumentsObject>()) {
tenuredSize += ArgumentsObject::objectMovedDuringMinorGC(this, dst, src);
} else if (src->is<ProxyObject>()) {
diff --git a/js/src/jit/AliasAnalysisShared.cpp b/js/src/jit/AliasAnalysisShared.cpp
index 400626b33..1a643698f 100644
--- a/js/src/jit/AliasAnalysisShared.cpp
+++ b/js/src/jit/AliasAnalysisShared.cpp
@@ -91,6 +91,10 @@ GetObject(const MDefinition* ins)
case MDefinition::Op_Elements:
case MDefinition::Op_MaybeCopyElementsForWrite:
case MDefinition::Op_MaybeToDoubleElement:
+ case MDefinition::Op_UnboxedArrayLength:
+ case MDefinition::Op_UnboxedArrayInitializedLength:
+ case MDefinition::Op_IncrementUnboxedArrayInitializedLength:
+ case MDefinition::Op_SetUnboxedArrayInitializedLength:
case MDefinition::Op_TypedArrayLength:
case MDefinition::Op_SetTypedObjectOffset:
case MDefinition::Op_SetDisjointTypedElements:
diff --git a/js/src/jit/BaselineCacheIR.cpp b/js/src/jit/BaselineCacheIR.cpp
index 7fb586811..bf96932d1 100644
--- a/js/src/jit/BaselineCacheIR.cpp
+++ b/js/src/jit/BaselineCacheIR.cpp
@@ -787,6 +787,9 @@ BaselineCacheIRCompiler::emitGuardClass()
case GuardClassKind::Array:
clasp = &ArrayObject::class_;
break;
+ case GuardClassKind::UnboxedArray:
+ clasp = &UnboxedArrayObject::class_;
+ break;
case GuardClassKind::MappedArguments:
clasp = &MappedArgumentsObject::class_;
break;
@@ -1001,6 +1004,19 @@ BaselineCacheIRCompiler::emitLoadInt32ArrayLengthResult()
}
bool
+BaselineCacheIRCompiler::emitLoadUnboxedArrayLengthResult()
+{
+ Register obj = allocator.useRegister(masm, reader.objOperandId());
+ masm.load32(Address(obj, UnboxedArrayObject::offsetOfLength()), R0.scratchReg());
+ masm.tagValue(JSVAL_TYPE_INT32, R0.scratchReg(), R0);
+
+ // The int32 type was monitored when attaching the stub, so we can
+ // just return.
+ emitReturnFromIC();
+ return true;
+}
+
+bool
BaselineCacheIRCompiler::emitLoadArgumentsObjectLengthResult()
{
Register obj = allocator.useRegister(masm, reader.objOperandId());
diff --git a/js/src/jit/BaselineCompiler.cpp b/js/src/jit/BaselineCompiler.cpp
index d254b9826..ae5a2e666 100644
--- a/js/src/jit/BaselineCompiler.cpp
+++ b/js/src/jit/BaselineCompiler.cpp
@@ -2050,7 +2050,13 @@ BaselineCompiler::emit_JSOP_NEWARRAY()
return true;
}
-typedef ArrayObject* (*NewArrayCopyOnWriteFn)(JSContext*, HandleArrayObject, gc::InitialHeap);
+bool
+BaselineCompiler::emit_JSOP_SPREADCALLARRAY()
+{
+ return emit_JSOP_NEWARRAY();
+}
+
+typedef JSObject* (*NewArrayCopyOnWriteFn)(JSContext*, HandleArrayObject, gc::InitialHeap);
const VMFunction jit::NewArrayCopyOnWriteInfo =
FunctionInfo<NewArrayCopyOnWriteFn>(js::NewDenseCopyOnWriteArray, "NewDenseCopyOnWriteArray");
@@ -4181,14 +4187,14 @@ BaselineCompiler::emit_JSOP_REST()
{
frame.syncStack(0);
- ArrayObject* templateObject =
+ JSObject* templateObject =
ObjectGroup::newArrayObject(cx, nullptr, 0, TenuredObject,
ObjectGroup::NewArrayKind::UnknownIndex);
if (!templateObject)
return false;
// Call IC.
- ICRest_Fallback::Compiler compiler(cx, templateObject);
+ ICRest_Fallback::Compiler compiler(cx, &templateObject->as<ArrayObject>());
if (!emitOpIC(compiler.getStub(&stubSpace_)))
return false;
diff --git a/js/src/jit/BaselineCompiler.h b/js/src/jit/BaselineCompiler.h
index a200f7ab9..7b1af092a 100644
--- a/js/src/jit/BaselineCompiler.h
+++ b/js/src/jit/BaselineCompiler.h
@@ -100,6 +100,7 @@ namespace jit {
_(JSOP_BITNOT) \
_(JSOP_NEG) \
_(JSOP_NEWARRAY) \
+ _(JSOP_SPREADCALLARRAY) \
_(JSOP_NEWARRAY_COPYONWRITE) \
_(JSOP_INITELEM_ARRAY) \
_(JSOP_NEWOBJECT) \
diff --git a/js/src/jit/BaselineIC.cpp b/js/src/jit/BaselineIC.cpp
index 1b98325b7..9c8cd9835 100644
--- a/js/src/jit/BaselineIC.cpp
+++ b/js/src/jit/BaselineIC.cpp
@@ -1375,7 +1375,7 @@ IsNativeDenseElementAccess(HandleObject obj, HandleValue key)
static bool
IsNativeOrUnboxedDenseElementAccess(HandleObject obj, HandleValue key)
{
- if (!obj->isNative())
+ if (!obj->isNative() && !obj->is<UnboxedArrayObject>())
return false;
if (key.isInt32() && key.toInt32() >= 0 && !obj->is<TypedArrayObject>())
return true;
@@ -1479,6 +1479,20 @@ TryAttachGetElemStub(JSContext* cx, JSScript* script, jsbytecode* pc, ICGetElem_
script = rootedScript;
}
+ // Check for UnboxedArray[int] accesses.
+ if (obj->is<UnboxedArrayObject>() && rhs.isInt32() && rhs.toInt32() >= 0) {
+ JitSpew(JitSpew_BaselineIC, " Generating GetElem(UnboxedArray[Int32]) stub");
+ ICGetElem_UnboxedArray::Compiler compiler(cx, stub->fallbackMonitorStub()->firstMonitorStub(),
+ obj->group());
+ ICStub* unboxedStub = compiler.getStub(compiler.getStubSpace(script));
+ if (!unboxedStub)
+ return false;
+
+ stub->addNewStub(unboxedStub);
+ *attached = true;
+ return true;
+ }
+
// Check for TypedArray[int] => Number and TypedObject[int] => Number accesses.
if ((obj->is<TypedArrayObject>() || IsPrimitiveArrayTypedObject(obj)) &&
rhs.isNumber() &&
@@ -2085,6 +2099,56 @@ ICGetElem_Dense::Compiler::generateStubCode(MacroAssembler& masm)
}
//
+// GetElem_UnboxedArray
+//
+
+bool
+ICGetElem_UnboxedArray::Compiler::generateStubCode(MacroAssembler& masm)
+{
+ MOZ_ASSERT(engine_ == Engine::Baseline);
+
+ Label failure;
+ masm.branchTestObject(Assembler::NotEqual, R0, &failure);
+ masm.branchTestInt32(Assembler::NotEqual, R1, &failure);
+
+ AllocatableGeneralRegisterSet regs(availableGeneralRegs(2));
+ Register scratchReg = regs.takeAny();
+
+ // Unbox R0 and group guard.
+ Register obj = masm.extractObject(R0, ExtractTemp0);
+ masm.loadPtr(Address(ICStubReg, ICGetElem_UnboxedArray::offsetOfGroup()), scratchReg);
+ masm.branchTestObjGroup(Assembler::NotEqual, obj, scratchReg, &failure);
+
+ // Unbox key.
+ Register key = masm.extractInt32(R1, ExtractTemp1);
+
+ // Bounds check.
+ masm.load32(Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()),
+ scratchReg);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), scratchReg);
+ masm.branch32(Assembler::BelowOrEqual, scratchReg, key, &failure);
+
+ // Load obj->elements.
+ masm.loadPtr(Address(obj, UnboxedArrayObject::offsetOfElements()), scratchReg);
+
+ // Load value.
+ size_t width = UnboxedTypeSize(elementType_);
+ BaseIndex addr(scratchReg, key, ScaleFromElemWidth(width));
+ masm.loadUnboxedProperty(addr, elementType_, R0);
+
+ // Only monitor the result if its type might change.
+ if (elementType_ == JSVAL_TYPE_OBJECT)
+ EmitEnterTypeMonitorIC(masm);
+ else
+ EmitReturnFromIC(masm);
+
+ // Failure case - jump to next stub
+ masm.bind(&failure);
+ EmitStubGuardFailure(masm);
+ return true;
+}
+
+//
// GetElem_TypedArray
//
@@ -2388,8 +2452,8 @@ CanOptimizeDenseOrUnboxedArraySetElem(JSObject* obj, uint32_t index,
Shape* oldShape, uint32_t oldCapacity, uint32_t oldInitLength,
bool* isAddingCaseOut, size_t* protoDepthOut)
{
- uint32_t initLength = obj->as<NativeObject>().getDenseInitializedLength();
- uint32_t capacity = obj->as<NativeObject>().getDenseCapacity();
+ uint32_t initLength = GetAnyBoxedOrUnboxedInitializedLength(obj);
+ uint32_t capacity = GetAnyBoxedOrUnboxedCapacity(obj);
*isAddingCaseOut = false;
*protoDepthOut = 0;
@@ -2398,6 +2462,10 @@ CanOptimizeDenseOrUnboxedArraySetElem(JSObject* obj, uint32_t index,
if (initLength < oldInitLength || capacity < oldCapacity)
return false;
+ // Unboxed arrays need to be able to emit floating point code.
+ if (obj->is<UnboxedArrayObject>() && !obj->runtimeFromMainThread()->jitSupportsFloatingPoint)
+ return false;
+
Shape* shape = obj->maybeShape();
// Cannot optimize if the shape changed.
@@ -2479,8 +2547,8 @@ DoSetElemFallback(JSContext* cx, BaselineFrame* frame, ICSetElem_Fallback* stub_
uint32_t oldCapacity = 0;
uint32_t oldInitLength = 0;
if (index.isInt32() && index.toInt32() >= 0) {
- oldCapacity = obj->as<NativeObject>().getDenseCapacity();
- oldInitLength = obj->as<NativeObject>().getDenseInitializedLength();
+ oldCapacity = GetAnyBoxedOrUnboxedCapacity(obj);
+ oldInitLength = GetAnyBoxedOrUnboxedInitializedLength(obj);
}
if (op == JSOP_INITELEM || op == JSOP_INITHIDDENELEM) {
@@ -2818,6 +2886,29 @@ ICSetElem_DenseOrUnboxedArray::Compiler::generateStubCode(MacroAssembler& masm)
masm.loadValue(valueAddr, tmpVal);
EmitPreBarrier(masm, element, MIRType::Value);
masm.storeValue(tmpVal, element);
+ } else {
+ // Set element on an unboxed array.
+
+ // Bounds check.
+ Address initLength(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ masm.load32(initLength, scratchReg);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), scratchReg);
+ masm.branch32(Assembler::BelowOrEqual, scratchReg, key, &failure);
+
+ // Load obj->elements.
+ masm.loadPtr(Address(obj, UnboxedArrayObject::offsetOfElements()), scratchReg);
+
+ // Compute the address being written to.
+ BaseIndex address(scratchReg, key, ScaleFromElemWidth(UnboxedTypeSize(unboxedType_)));
+
+ EmitUnboxedPreBarrierForBaseline(masm, address, unboxedType_);
+
+ Address valueAddr(masm.getStackPointer(), ICStackValueOffset + sizeof(Value));
+ masm.Push(R0);
+ masm.loadValue(valueAddr, R0);
+ masm.storeUnboxedProperty(address, unboxedType_,
+ ConstantOrRegister(TypedOrValueRegister(R0)), &failurePopR0);
+ masm.Pop(R0);
}
EmitReturnFromIC(masm);
@@ -3011,6 +3102,40 @@ ICSetElemDenseOrUnboxedArrayAddCompiler::generateStubCode(MacroAssembler& masm)
BaseIndex element(scratchReg, key, TimesEight);
masm.loadValue(valueAddr, tmpVal);
masm.storeValue(tmpVal, element);
+ } else {
+ // Adding element to an unboxed array.
+
+ // Bounds check (key == initLength)
+ Address initLengthAddr(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ masm.load32(initLengthAddr, scratchReg);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), scratchReg);
+ masm.branch32(Assembler::NotEqual, scratchReg, key, &failure);
+
+ // Capacity check.
+ masm.checkUnboxedArrayCapacity(obj, RegisterOrInt32Constant(key), scratchReg, &failure);
+
+ // Load obj->elements.
+ masm.loadPtr(Address(obj, UnboxedArrayObject::offsetOfElements()), scratchReg);
+
+ // Write the value first, since this can fail. No need for pre-barrier
+ // since we're not overwriting an old value.
+ masm.Push(R0);
+ Address valueAddr(masm.getStackPointer(), ICStackValueOffset + sizeof(Value));
+ masm.loadValue(valueAddr, R0);
+ BaseIndex address(scratchReg, key, ScaleFromElemWidth(UnboxedTypeSize(unboxedType_)));
+ masm.storeUnboxedProperty(address, unboxedType_,
+ ConstantOrRegister(TypedOrValueRegister(R0)), &failurePopR0);
+ masm.Pop(R0);
+
+ // Increment initialized length.
+ masm.add32(Imm32(1), initLengthAddr);
+
+ // If length is now <= key, increment length.
+ Address lengthAddr(obj, UnboxedArrayObject::offsetOfLength());
+ Label skipIncrementLength;
+ masm.branch32(Assembler::Above, lengthAddr, key, &skipIncrementLength);
+ masm.add32(Imm32(1), lengthAddr);
+ masm.bind(&skipIncrementLength);
}
EmitReturnFromIC(masm);
@@ -5374,6 +5499,13 @@ GetTemplateObjectForSimd(JSContext* cx, JSFunction* target, MutableHandleObject
return true;
}
+static void
+EnsureArrayGroupAnalyzed(JSContext* cx, JSObject* obj)
+{
+ if (PreliminaryObjectArrayWithTemplate* objects = obj->group()->maybePreliminaryObjects())
+ objects->maybeAnalyze(cx, obj->group(), /* forceAnalyze = */ true);
+}
+
static bool
GetTemplateObjectForNative(JSContext* cx, HandleFunction target, const CallArgs& args,
MutableHandleObject res, bool* skipAttach)
@@ -5405,7 +5537,10 @@ GetTemplateObjectForNative(JSContext* cx, HandleFunction target, const CallArgs&
// With this and other array templates, analyze the group so that
// we don't end up with a template whose structure might change later.
res.set(NewFullyAllocatedArrayForCallingAllocationSite(cx, count, TenuredObject));
- return !!res;
+ if (!res)
+ return false;
+ EnsureArrayGroupAnalyzed(cx, res);
+ return true;
}
}
@@ -5430,7 +5565,10 @@ GetTemplateObjectForNative(JSContext* cx, HandleFunction target, const CallArgs&
return true;
}
res.set(NewFullyAllocatedArrayTryReuseGroup(cx, obj, 0, TenuredObject));
- return !!res;
+ if (!res)
+ return false;
+ EnsureArrayGroupAnalyzed(cx, res);
+ return true;
}
}
}
@@ -5447,7 +5585,10 @@ GetTemplateObjectForNative(JSContext* cx, HandleFunction target, const CallArgs&
}
res.set(NewFullyAllocatedArrayForCallingAllocationSite(cx, 0, TenuredObject));
- return !!res;
+ if (!res)
+ return false;
+ EnsureArrayGroupAnalyzed(cx, res);
+ return true;
}
if (native == StringConstructor) {
@@ -5760,24 +5901,15 @@ TryAttachCallStub(JSContext* cx, ICCall_Fallback* stub, HandleScript script, jsb
}
static bool
-CopyArray(JSContext* cx, HandleArrayObject arr, MutableHandleValue result)
+CopyArray(JSContext* cx, HandleObject obj, MutableHandleValue result)
{
- uint32_t length = arr->length();
- ArrayObject* nobj = NewFullyAllocatedArrayTryReuseGroup(cx, arr, length, TenuredObject);
+ uint32_t length = GetAnyBoxedOrUnboxedArrayLength(obj);
+ JSObject* nobj = NewFullyAllocatedArrayTryReuseGroup(cx, obj, length, TenuredObject);
if (!nobj)
return false;
-
- MOZ_ASSERT(arr->isNative());
- MOZ_ASSERT(nobj->isNative());
- MOZ_ASSERT(nobj->as<NativeObject>().getDenseInitializedLength() == 0);
- MOZ_ASSERT(arr->as<NativeObject>().getDenseInitializedLength() >= length);
- MOZ_ASSERT(nobj->as<NativeObject>().getDenseCapacity() >= length);
-
- nobj->as<NativeObject>().setDenseInitializedLength(length);
-
- const Value* vp = arr->as<NativeObject>().getDenseElements();
- nobj->as<NativeObject>().initDenseElements(0, vp, length);
-
+ EnsureArrayGroupAnalyzed(cx, nobj);
+ CopyAnyBoxedOrUnboxedDenseElements(cx, nobj, obj, 0, 0, length);
+
result.setObject(*nobj);
return true;
}
@@ -5808,22 +5940,26 @@ TryAttachStringSplit(JSContext* cx, ICCall_Fallback* stub, HandleScript script,
RootedValue arr(cx);
// Copy the array before storing in stub.
- if (!CopyArray(cx, obj.as<ArrayObject>(), &arr))
+ if (!CopyArray(cx, obj, &arr))
return false;
// Atomize all elements of the array.
- RootedArrayObject arrObj(cx, &arr.toObject().as<ArrayObject>());
- uint32_t initLength = arrObj->length();
+ RootedObject arrObj(cx, &arr.toObject());
+ uint32_t initLength = GetAnyBoxedOrUnboxedArrayLength(arrObj);
for (uint32_t i = 0; i < initLength; i++) {
- JSAtom* str = js::AtomizeString(cx, arrObj->getDenseElement(i).toString());
+ JSAtom* str = js::AtomizeString(cx, GetAnyBoxedOrUnboxedDenseElement(arrObj, i).toString());
if (!str)
return false;
- arrObj->setDenseElementWithType(cx, i, StringValue(str));
+ if (!SetAnyBoxedOrUnboxedDenseElement(cx, arrObj, i, StringValue(str))) {
+ // The value could not be stored to an unboxed dense element.
+ return true;
+ }
}
ICCall_StringSplit::Compiler compiler(cx, stub->fallbackMonitorStub()->firstMonitorStub(),
- script->pcToOffset(pc), str, sep, arrObj);
+ script->pcToOffset(pc), str, sep,
+ arr);
ICStub* newStub = compiler.getStub(compiler.getStubSpace(script));
if (!newStub)
return false;
@@ -6711,7 +6847,7 @@ ICCallScriptedCompiler::generateStubCode(MacroAssembler& masm)
return true;
}
-typedef bool (*CopyArrayFn)(JSContext*, HandleArrayObject, MutableHandleValue);
+typedef bool (*CopyArrayFn)(JSContext*, HandleObject, MutableHandleValue);
static const VMFunction CopyArrayInfo = FunctionInfo<CopyArrayFn>(CopyArray, "CopyArray");
bool
@@ -8188,6 +8324,19 @@ ICGetElem_Dense::Clone(JSContext* cx, ICStubSpace* space, ICStub* firstMonitorSt
return New<ICGetElem_Dense>(cx, space, other.jitCode(), firstMonitorStub, other.shape_);
}
+ICGetElem_UnboxedArray::ICGetElem_UnboxedArray(JitCode* stubCode, ICStub* firstMonitorStub,
+ ObjectGroup *group)
+ : ICMonitoredStub(GetElem_UnboxedArray, stubCode, firstMonitorStub),
+ group_(group)
+{ }
+
+/* static */ ICGetElem_UnboxedArray*
+ICGetElem_UnboxedArray::Clone(JSContext* cx, ICStubSpace* space, ICStub* firstMonitorStub,
+ ICGetElem_UnboxedArray& other)
+{
+ return New<ICGetElem_UnboxedArray>(cx, space, other.jitCode(), firstMonitorStub, other.group_);
+}
+
ICGetElem_TypedArray::ICGetElem_TypedArray(JitCode* stubCode, Shape* shape, Scalar::Type type)
: ICStub(GetElem_TypedArray, stubCode),
shape_(shape)
@@ -8563,8 +8712,8 @@ static bool DoRestFallback(JSContext* cx, BaselineFrame* frame, ICRest_Fallback*
unsigned numRest = numActuals > numFormals ? numActuals - numFormals : 0;
Value* rest = frame->argv() + numFormals;
- ArrayObject* obj = ObjectGroup::newArrayObject(cx, rest, numRest, GenericObject,
- ObjectGroup::NewArrayKind::UnknownIndex);
+ JSObject* obj = ObjectGroup::newArrayObject(cx, rest, numRest, GenericObject,
+ ObjectGroup::NewArrayKind::UnknownIndex);
if (!obj)
return false;
res.setObject(*obj);
diff --git a/js/src/jit/BaselineIC.h b/js/src/jit/BaselineIC.h
index a1291a3bb..5600f816a 100644
--- a/js/src/jit/BaselineIC.h
+++ b/js/src/jit/BaselineIC.h
@@ -892,6 +892,54 @@ class ICGetElem_Dense : public ICMonitoredStub
};
};
+class ICGetElem_UnboxedArray : public ICMonitoredStub
+{
+ friend class ICStubSpace;
+
+ GCPtrObjectGroup group_;
+
+ ICGetElem_UnboxedArray(JitCode* stubCode, ICStub* firstMonitorStub, ObjectGroup* group);
+
+ public:
+ static ICGetElem_UnboxedArray* Clone(JSContext* cx, ICStubSpace* space,
+ ICStub* firstMonitorStub, ICGetElem_UnboxedArray& other);
+
+ static size_t offsetOfGroup() {
+ return offsetof(ICGetElem_UnboxedArray, group_);
+ }
+
+ GCPtrObjectGroup& group() {
+ return group_;
+ }
+
+ class Compiler : public ICStubCompiler {
+ ICStub* firstMonitorStub_;
+ RootedObjectGroup group_;
+ JSValueType elementType_;
+
+ protected:
+ MOZ_MUST_USE bool generateStubCode(MacroAssembler& masm);
+
+ virtual int32_t getKey() const {
+ return static_cast<int32_t>(engine_) |
+ (static_cast<int32_t>(kind) << 1) |
+ (static_cast<int32_t>(elementType_) << 17);
+ }
+
+ public:
+ Compiler(JSContext* cx, ICStub* firstMonitorStub, ObjectGroup* group)
+ : ICStubCompiler(cx, ICStub::GetElem_UnboxedArray, Engine::Baseline),
+ firstMonitorStub_(firstMonitorStub),
+ group_(cx, group),
+ elementType_(group->unboxedLayoutDontCheckGeneration().elementType())
+ {}
+
+ ICStub* getStub(ICStubSpace* space) {
+ return newStub<ICGetElem_UnboxedArray>(space, getStubCode(), firstMonitorStub_, group_);
+ }
+ };
+};
+
// Accesses scalar elements of a typed array or typed object.
class ICGetElem_TypedArray : public ICStub
{
@@ -1067,7 +1115,9 @@ class ICSetElem_DenseOrUnboxedArray : public ICUpdatedStub
: ICStubCompiler(cx, ICStub::SetElem_DenseOrUnboxedArray, Engine::Baseline),
shape_(cx, shape),
group_(cx, group),
- unboxedType_(JSVAL_TYPE_MAGIC)
+ unboxedType_(shape
+ ? JSVAL_TYPE_MAGIC
+ : group->unboxedLayoutDontCheckGeneration().elementType())
{}
ICUpdatedStub* getStub(ICStubSpace* space) {
@@ -1175,7 +1225,9 @@ class ICSetElemDenseOrUnboxedArrayAddCompiler : public ICStubCompiler {
: ICStubCompiler(cx, ICStub::SetElem_DenseOrUnboxedArrayAdd, Engine::Baseline),
obj_(cx, obj),
protoChainDepth_(protoChainDepth),
- unboxedType_(JSVAL_TYPE_MAGIC)
+ unboxedType_(obj->is<UnboxedArrayObject>()
+ ? obj->as<UnboxedArrayObject>().elementType()
+ : JSVAL_TYPE_MAGIC)
{}
template <size_t ProtoChainDepth>
@@ -2822,10 +2874,10 @@ class ICCall_StringSplit : public ICMonitoredStub
uint32_t pcOffset_;
GCPtrString expectedStr_;
GCPtrString expectedSep_;
- GCPtrArrayObject templateObject_;
+ GCPtrObject templateObject_;
ICCall_StringSplit(JitCode* stubCode, ICStub* firstMonitorStub, uint32_t pcOffset, JSString* str,
- JSString* sep, ArrayObject* templateObject)
+ JSString* sep, JSObject* templateObject)
: ICMonitoredStub(ICStub::Call_StringSplit, stubCode, firstMonitorStub),
pcOffset_(pcOffset), expectedStr_(str), expectedSep_(sep),
templateObject_(templateObject)
@@ -2852,7 +2904,7 @@ class ICCall_StringSplit : public ICMonitoredStub
return expectedSep_;
}
- GCPtrArrayObject& templateObject() {
+ GCPtrObject& templateObject() {
return templateObject_;
}
@@ -2862,7 +2914,7 @@ class ICCall_StringSplit : public ICMonitoredStub
uint32_t pcOffset_;
RootedString expectedStr_;
RootedString expectedSep_;
- RootedArrayObject templateObject_;
+ RootedObject templateObject_;
MOZ_MUST_USE bool generateStubCode(MacroAssembler& masm);
@@ -2873,13 +2925,13 @@ class ICCall_StringSplit : public ICMonitoredStub
public:
Compiler(JSContext* cx, ICStub* firstMonitorStub, uint32_t pcOffset, HandleString str,
- HandleString sep, HandleArrayObject templateObject)
+ HandleString sep, HandleValue templateObject)
: ICCallStubCompiler(cx, ICStub::Call_StringSplit),
firstMonitorStub_(firstMonitorStub),
pcOffset_(pcOffset),
expectedStr_(cx, str),
expectedSep_(cx, sep),
- templateObject_(cx, templateObject)
+ templateObject_(cx, &templateObject.toObject())
{ }
ICStub* getStub(ICStubSpace* space) {
diff --git a/js/src/jit/BaselineInspector.cpp b/js/src/jit/BaselineInspector.cpp
index bcb527516..9c7b88fb2 100644
--- a/js/src/jit/BaselineInspector.cpp
+++ b/js/src/jit/BaselineInspector.cpp
@@ -580,7 +580,7 @@ BaselineInspector::getTemplateObjectForNative(jsbytecode* pc, Native native)
bool
BaselineInspector::isOptimizableCallStringSplit(jsbytecode* pc, JSString** strOut, JSString** sepOut,
- ArrayObject** objOut)
+ JSObject** objOut)
{
if (!hasBaselineScript())
return false;
diff --git a/js/src/jit/BaselineInspector.h b/js/src/jit/BaselineInspector.h
index 1ed4b5547..4a1791798 100644
--- a/js/src/jit/BaselineInspector.h
+++ b/js/src/jit/BaselineInspector.h
@@ -113,7 +113,7 @@ class BaselineInspector
bool hasSeenNonStringIterMore(jsbytecode* pc);
MOZ_MUST_USE bool isOptimizableCallStringSplit(jsbytecode* pc, JSString** strOut,
- JSString** sepOut, ArrayObject** objOut);
+ JSString** sepOut, JSObject** objOut);
JSObject* getTemplateObject(jsbytecode* pc);
JSObject* getTemplateObjectForNative(jsbytecode* pc, Native native);
JSObject* getTemplateObjectForClassHook(jsbytecode* pc, const Class* clasp);
diff --git a/js/src/jit/CacheIR.cpp b/js/src/jit/CacheIR.cpp
index 6822a70af..f1061af70 100644
--- a/js/src/jit/CacheIR.cpp
+++ b/js/src/jit/CacheIR.cpp
@@ -175,7 +175,7 @@ TestMatchingReceiver(CacheIRWriter& writer, JSObject* obj, Shape* shape, ObjOper
} else {
writer.guardNoUnboxedExpando(objId);
}
- } else if (obj->is<TypedObject>()) {
+ } else if (obj->is<UnboxedArrayObject>() || obj->is<TypedObject>()) {
writer.guardGroup(objId, obj->group());
} else {
Shape* shape = obj->maybeShape();
@@ -368,6 +368,13 @@ GetPropIRGenerator::tryAttachObjectLength(CacheIRWriter& writer, HandleObject ob
return true;
}
+ if (obj->is<UnboxedArrayObject>()) {
+ writer.guardClass(objId, GuardClassKind::UnboxedArray);
+ writer.loadUnboxedArrayLengthResult(objId);
+ emitted_ = true;
+ return true;
+ }
+
if (obj->is<ArgumentsObject>() && !obj->as<ArgumentsObject>().hasOverriddenLength()) {
if (obj->is<MappedArgumentsObject>()) {
writer.guardClass(objId, GuardClassKind::MappedArguments);
diff --git a/js/src/jit/CacheIR.h b/js/src/jit/CacheIR.h
index 4fd8575f0..51e55f48b 100644
--- a/js/src/jit/CacheIR.h
+++ b/js/src/jit/CacheIR.h
@@ -96,6 +96,7 @@ class ObjOperandId : public OperandId
_(LoadUnboxedPropertyResult) \
_(LoadTypedObjectResult) \
_(LoadInt32ArrayLengthResult) \
+ _(LoadUnboxedArrayLengthResult) \
_(LoadArgumentsObjectLengthResult) \
_(LoadUndefinedResult)
@@ -127,6 +128,7 @@ struct StubField {
enum class GuardClassKind
{
Array,
+ UnboxedArray,
MappedArguments,
UnmappedArguments,
};
@@ -325,6 +327,9 @@ class MOZ_RAII CacheIRWriter
void loadInt32ArrayLengthResult(ObjOperandId obj) {
writeOpWithOperandId(CacheOp::LoadInt32ArrayLengthResult, obj);
}
+ void loadUnboxedArrayLengthResult(ObjOperandId obj) {
+ writeOpWithOperandId(CacheOp::LoadUnboxedArrayLengthResult, obj);
+ }
void loadArgumentsObjectLengthResult(ObjOperandId obj) {
writeOpWithOperandId(CacheOp::LoadArgumentsObjectLengthResult, obj);
}
diff --git a/js/src/jit/CodeGenerator.cpp b/js/src/jit/CodeGenerator.cpp
index 901e9ea93..c3e242991 100644
--- a/js/src/jit/CodeGenerator.cpp
+++ b/js/src/jit/CodeGenerator.cpp
@@ -3184,7 +3184,9 @@ CodeGenerator::visitSetPropertyPolymorphicT(LSetPropertyPolymorphicT* ins)
void
CodeGenerator::visitElements(LElements* lir)
{
- Address elements(ToRegister(lir->object()), NativeObject::offsetOfElements());
+ Address elements(ToRegister(lir->object()),
+ lir->mir()->unboxed() ? UnboxedArrayObject::offsetOfElements()
+ : NativeObject::offsetOfElements());
masm.loadPtr(elements, ToRegister(lir->output()));
}
@@ -5169,11 +5171,11 @@ static JSObject*
NewArrayWithGroup(JSContext* cx, uint32_t length, HandleObjectGroup group,
bool convertDoubleElements)
{
- ArrayObject* res = NewFullyAllocatedArrayTryUseGroup(cx, group, length);
+ JSObject* res = NewFullyAllocatedArrayTryUseGroup(cx, group, length);
if (!res)
return nullptr;
if (convertDoubleElements)
- res->setShouldConvertDoubleElements();
+ res->as<ArrayObject>().setShouldConvertDoubleElements();
return res;
}
@@ -5319,7 +5321,7 @@ CodeGenerator::visitNewArrayCopyOnWrite(LNewArrayCopyOnWrite* lir)
masm.bind(ool->rejoin());
}
-typedef ArrayObject* (*ArrayConstructorOneArgFn)(JSContext*, HandleObjectGroup, int32_t length);
+typedef JSObject* (*ArrayConstructorOneArgFn)(JSContext*, HandleObjectGroup, int32_t length);
static const VMFunction ArrayConstructorOneArgInfo =
FunctionInfo<ArrayConstructorOneArgFn>(ArrayConstructorOneArg, "ArrayConstructorOneArg");
@@ -5339,11 +5341,21 @@ CodeGenerator::visitNewArrayDynamicLength(LNewArrayDynamicLength* lir)
bool canInline = true;
size_t inlineLength = 0;
- if (templateObject->as<ArrayObject>().hasFixedElements()) {
- size_t numSlots = gc::GetGCKindSlots(templateObject->asTenured().getAllocKind());
- inlineLength = numSlots - ObjectElements::VALUES_PER_HEADER;
+ if (templateObject->is<ArrayObject>()) {
+ if (templateObject->as<ArrayObject>().hasFixedElements()) {
+ size_t numSlots = gc::GetGCKindSlots(templateObject->asTenured().getAllocKind());
+ inlineLength = numSlots - ObjectElements::VALUES_PER_HEADER;
+ } else {
+ canInline = false;
+ }
} else {
- canInline = false;
+ if (templateObject->as<UnboxedArrayObject>().hasInlineElements()) {
+ size_t nbytes =
+ templateObject->tenuredSizeOfThis() - UnboxedArrayObject::offsetOfInlineElements();
+ inlineLength = nbytes / templateObject->as<UnboxedArrayObject>().elementSize();
+ } else {
+ canInline = false;
+ }
}
if (canInline) {
@@ -7765,7 +7777,7 @@ CodeGenerator::visitSinCos(LSinCos *lir)
masm.freeStack(sizeof(double) * 2);
}
-typedef ArrayObject* (*StringSplitFn)(JSContext*, HandleObjectGroup, HandleString, HandleString, uint32_t);
+typedef JSObject* (*StringSplitFn)(JSContext*, HandleObjectGroup, HandleString, HandleString, uint32_t);
static const VMFunction StringSplitInfo =
FunctionInfo<StringSplitFn>(js::str_split_string, "str_split_string");
@@ -7800,6 +7812,49 @@ CodeGenerator::visitSetInitializedLength(LSetInitializedLength* lir)
}
void
+CodeGenerator::visitUnboxedArrayLength(LUnboxedArrayLength* lir)
+{
+ Register obj = ToRegister(lir->object());
+ Register result = ToRegister(lir->output());
+ masm.load32(Address(obj, UnboxedArrayObject::offsetOfLength()), result);
+}
+
+void
+CodeGenerator::visitUnboxedArrayInitializedLength(LUnboxedArrayInitializedLength* lir)
+{
+ Register obj = ToRegister(lir->object());
+ Register result = ToRegister(lir->output());
+ masm.load32(Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()), result);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), result);
+}
+
+void
+CodeGenerator::visitIncrementUnboxedArrayInitializedLength(LIncrementUnboxedArrayInitializedLength* lir)
+{
+ Register obj = ToRegister(lir->object());
+ masm.add32(Imm32(1), Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()));
+}
+
+void
+CodeGenerator::visitSetUnboxedArrayInitializedLength(LSetUnboxedArrayInitializedLength* lir)
+{
+ Register obj = ToRegister(lir->object());
+ RegisterOrInt32Constant key = ToRegisterOrInt32Constant(lir->length());
+ Register temp = ToRegister(lir->temp());
+
+ Address initLengthAddr(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ masm.load32(initLengthAddr, temp);
+ masm.and32(Imm32(UnboxedArrayObject::CapacityMask), temp);
+
+ if (key.isRegister())
+ masm.or32(key.reg(), temp);
+ else
+ masm.or32(Imm32(key.constant()), temp);
+
+ masm.store32(temp, initLengthAddr);
+}
+
+void
CodeGenerator::visitNotO(LNotO* lir)
{
MOZ_ASSERT(lir->mir()->operandMightEmulateUndefined(),
@@ -8095,19 +8150,46 @@ CodeGenerator::emitStoreElementHoleT(T* lir)
OutOfLineStoreElementHole* ool = new(alloc()) OutOfLineStoreElementHole(lir);
addOutOfLineCode(ool, lir->mir());
+ Register obj = ToRegister(lir->object());
Register elements = ToRegister(lir->elements());
const LAllocation* index = lir->index();
RegisterOrInt32Constant key = ToRegisterOrInt32Constant(index);
- Address initLength(elements, ObjectElements::offsetOfInitializedLength());
- masm.branch32(Assembler::BelowOrEqual, initLength, key, ool->entry());
+ JSValueType unboxedType = lir->mir()->unboxedType();
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ Address initLength(elements, ObjectElements::offsetOfInitializedLength());
+ masm.branch32(Assembler::BelowOrEqual, initLength, key, ool->entry());
- if (lir->mir()->needsBarrier())
- emitPreBarrier(elements, index, 0);
+ if (lir->mir()->needsBarrier())
+ emitPreBarrier(elements, index, 0);
+
+ masm.bind(ool->rejoinStore());
+ emitStoreElementTyped(lir->value(), lir->mir()->value()->type(), lir->mir()->elementType(),
+ elements, index, 0);
+ } else {
+ Register temp = ToRegister(lir->getTemp(0));
+ Address initLength(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ masm.load32(initLength, temp);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), temp);
+ masm.branch32(Assembler::BelowOrEqual, temp, key, ool->entry());
- masm.bind(ool->rejoinStore());
- emitStoreElementTyped(lir->value(), lir->mir()->value()->type(), lir->mir()->elementType(),
- elements, index, 0);
+ ConstantOrRegister v = ToConstantOrRegister(lir->value(), lir->mir()->value()->type());
+
+ if (index->isConstant()) {
+ Address address(elements, ToInt32(index) * UnboxedTypeSize(unboxedType));
+ EmitUnboxedPreBarrier(masm, address, unboxedType);
+
+ masm.bind(ool->rejoinStore());
+ masm.storeUnboxedProperty(address, unboxedType, v, nullptr);
+ } else {
+ BaseIndex address(elements, ToRegister(index),
+ ScaleFromElemWidth(UnboxedTypeSize(unboxedType)));
+ EmitUnboxedPreBarrier(masm, address, unboxedType);
+
+ masm.bind(ool->rejoinStore());
+ masm.storeUnboxedProperty(address, unboxedType, v, nullptr);
+ }
+ }
masm.bind(ool->rejoin());
}
@@ -8127,22 +8209,47 @@ CodeGenerator::emitStoreElementHoleV(T* lir)
OutOfLineStoreElementHole* ool = new(alloc()) OutOfLineStoreElementHole(lir);
addOutOfLineCode(ool, lir->mir());
+ Register obj = ToRegister(lir->object());
Register elements = ToRegister(lir->elements());
const LAllocation* index = lir->index();
const ValueOperand value = ToValue(lir, T::Value);
RegisterOrInt32Constant key = ToRegisterOrInt32Constant(index);
- Address initLength(elements, ObjectElements::offsetOfInitializedLength());
- masm.branch32(Assembler::BelowOrEqual, initLength, key, ool->entry());
+ JSValueType unboxedType = lir->mir()->unboxedType();
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ Address initLength(elements, ObjectElements::offsetOfInitializedLength());
+ masm.branch32(Assembler::BelowOrEqual, initLength, key, ool->entry());
- if (lir->mir()->needsBarrier())
- emitPreBarrier(elements, index, 0);
+ if (lir->mir()->needsBarrier())
+ emitPreBarrier(elements, index, 0);
- masm.bind(ool->rejoinStore());
- if (index->isConstant())
- masm.storeValue(value, Address(elements, ToInt32(index) * sizeof(js::Value)));
- else
- masm.storeValue(value, BaseIndex(elements, ToRegister(index), TimesEight));
+ masm.bind(ool->rejoinStore());
+ if (index->isConstant())
+ masm.storeValue(value, Address(elements, ToInt32(index) * sizeof(js::Value)));
+ else
+ masm.storeValue(value, BaseIndex(elements, ToRegister(index), TimesEight));
+ } else {
+ Register temp = ToRegister(lir->getTemp(0));
+ Address initLength(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ masm.load32(initLength, temp);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), temp);
+ masm.branch32(Assembler::BelowOrEqual, temp, key, ool->entry());
+
+ if (index->isConstant()) {
+ Address address(elements, ToInt32(index) * UnboxedTypeSize(unboxedType));
+ EmitUnboxedPreBarrier(masm, address, unboxedType);
+
+ masm.bind(ool->rejoinStore());
+ masm.storeUnboxedProperty(address, unboxedType, ConstantOrRegister(value), nullptr);
+ } else {
+ BaseIndex address(elements, ToRegister(index),
+ ScaleFromElemWidth(UnboxedTypeSize(unboxedType)));
+ EmitUnboxedPreBarrier(masm, address, unboxedType);
+
+ masm.bind(ool->rejoinStore());
+ masm.storeUnboxedProperty(address, unboxedType, ConstantOrRegister(value), nullptr);
+ }
+ }
masm.bind(ool->rejoin());
}
@@ -8213,10 +8320,11 @@ CodeGenerator::visitFallibleStoreElementV(LFallibleStoreElementV* lir)
masm.bind(&isFrozen);
}
-typedef bool (*SetDenseElementFn)(JSContext*, HandleNativeObject, int32_t, HandleValue,
- bool strict);
-static const VMFunction SetDenseElementInfo =
- FunctionInfo<SetDenseElementFn>(jit::SetDenseElement, "SetDenseElement");
+typedef bool (*SetDenseOrUnboxedArrayElementFn)(JSContext*, HandleObject, int32_t,
+ HandleValue, bool strict);
+static const VMFunction SetDenseOrUnboxedArrayElementInfo =
+ FunctionInfo<SetDenseOrUnboxedArrayElementFn>(SetDenseOrUnboxedArrayElement,
+ "SetDenseOrUnboxedArrayElement");
void
CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
@@ -8226,6 +8334,8 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
const LAllocation* index;
MIRType valueType;
ConstantOrRegister value;
+ JSValueType unboxedType;
+ LDefinition *temp = nullptr;
if (ins->isStoreElementHoleV()) {
LStoreElementHoleV* store = ins->toStoreElementHoleV();
@@ -8234,6 +8344,8 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
index = store->index();
valueType = store->mir()->value()->type();
value = TypedOrValueRegister(ToValue(store, LStoreElementHoleV::Value));
+ unboxedType = store->mir()->unboxedType();
+ temp = store->getTemp(0);
} else if (ins->isFallibleStoreElementV()) {
LFallibleStoreElementV* store = ins->toFallibleStoreElementV();
object = ToRegister(store->object());
@@ -8241,6 +8353,8 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
index = store->index();
valueType = store->mir()->value()->type();
value = TypedOrValueRegister(ToValue(store, LFallibleStoreElementV::Value));
+ unboxedType = store->mir()->unboxedType();
+ temp = store->getTemp(0);
} else if (ins->isStoreElementHoleT()) {
LStoreElementHoleT* store = ins->toStoreElementHoleT();
object = ToRegister(store->object());
@@ -8251,6 +8365,8 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
value = ConstantOrRegister(store->value()->toConstant()->toJSValue());
else
value = TypedOrValueRegister(valueType, ToAnyRegister(store->value()));
+ unboxedType = store->mir()->unboxedType();
+ temp = store->getTemp(0);
} else { // ins->isFallibleStoreElementT()
LFallibleStoreElementT* store = ins->toFallibleStoreElementT();
object = ToRegister(store->object());
@@ -8261,6 +8377,8 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
value = ConstantOrRegister(store->value()->toConstant()->toJSValue());
else
value = TypedOrValueRegister(valueType, ToAnyRegister(store->value()));
+ unboxedType = store->mir()->unboxedType();
+ temp = store->getTemp(0);
}
RegisterOrInt32Constant key = ToRegisterOrInt32Constant(index);
@@ -8271,32 +8389,54 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
Label callStub;
#if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
// Had to reimplement for MIPS because there are no flags.
- Address initLength(elements, ObjectElements::offsetOfInitializedLength());
- masm.branch32(Assembler::NotEqual, initLength, key, &callStub);
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ Address initLength(elements, ObjectElements::offsetOfInitializedLength());
+ masm.branch32(Assembler::NotEqual, initLength, key, &callStub);
+ } else {
+ Address initLength(object, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ masm.load32(initLength, ToRegister(temp));
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), ToRegister(temp));
+ masm.branch32(Assembler::NotEqual, ToRegister(temp), key, &callStub);
+ }
#else
masm.j(Assembler::NotEqual, &callStub);
#endif
- // Check array capacity.
- masm.branch32(Assembler::BelowOrEqual, Address(elements, ObjectElements::offsetOfCapacity()),
- key, &callStub);
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ // Check array capacity.
+ masm.branch32(Assembler::BelowOrEqual, Address(elements, ObjectElements::offsetOfCapacity()),
+ key, &callStub);
- // Update initialized length. The capacity guard above ensures this won't overflow,
- // due to MAX_DENSE_ELEMENTS_COUNT.
- masm.inc32(&key);
- masm.store32(key, Address(elements, ObjectElements::offsetOfInitializedLength()));
+ // Update initialized length. The capacity guard above ensures this won't overflow,
+ // due to MAX_DENSE_ELEMENTS_COUNT.
+ masm.inc32(&key);
+ masm.store32(key, Address(elements, ObjectElements::offsetOfInitializedLength()));
- // Update length if length < initializedLength.
- Label dontUpdate;
- masm.branch32(Assembler::AboveOrEqual, Address(elements, ObjectElements::offsetOfLength()),
- key, &dontUpdate);
- masm.store32(key, Address(elements, ObjectElements::offsetOfLength()));
- masm.bind(&dontUpdate);
+ // Update length if length < initializedLength.
+ Label dontUpdate;
+ masm.branch32(Assembler::AboveOrEqual, Address(elements, ObjectElements::offsetOfLength()),
+ key, &dontUpdate);
+ masm.store32(key, Address(elements, ObjectElements::offsetOfLength()));
+ masm.bind(&dontUpdate);
- masm.dec32(&key);
+ masm.dec32(&key);
+ } else {
+ // Check array capacity.
+ masm.checkUnboxedArrayCapacity(object, key, ToRegister(temp), &callStub);
+
+ // Update initialized length.
+ masm.add32(Imm32(1), Address(object, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()));
+
+ // Update length if length < initializedLength.
+ Address lengthAddr(object, UnboxedArrayObject::offsetOfLength());
+ Label dontUpdate;
+ masm.branch32(Assembler::Above, lengthAddr, key, &dontUpdate);
+ masm.add32(Imm32(1), lengthAddr);
+ masm.bind(&dontUpdate);
+ }
if ((ins->isStoreElementHoleT() || ins->isFallibleStoreElementT()) &&
- valueType != MIRType::Double)
+ unboxedType == JSVAL_TYPE_MAGIC && valueType != MIRType::Double)
{
// The inline path for StoreElementHoleT and FallibleStoreElementT does not always store
// the type tag, so we do the store on the OOL path. We use MIRType::None for the element
@@ -8325,7 +8465,7 @@ CodeGenerator::visitOutOfLineStoreElementHole(OutOfLineStoreElementHole* ool)
else
pushArg(ToRegister(index));
pushArg(object);
- callVM(SetDenseElementInfo, ins);
+ callVM(SetDenseOrUnboxedArrayElementInfo, ins);
restoreLive(ins);
masm.jump(ool->rejoin());
@@ -8386,6 +8526,9 @@ typedef bool (*ConvertUnboxedObjectToNativeFn)(JSContext*, JSObject*);
static const VMFunction ConvertUnboxedPlainObjectToNativeInfo =
FunctionInfo<ConvertUnboxedObjectToNativeFn>(UnboxedPlainObject::convertToNative,
"UnboxedPlainObject::convertToNative");
+static const VMFunction ConvertUnboxedArrayObjectToNativeInfo =
+ FunctionInfo<ConvertUnboxedObjectToNativeFn>(UnboxedArrayObject::convertToNative,
+ "UnboxedArrayObject::convertToNative");
typedef bool (*ArrayPopShiftFn)(JSContext*, HandleObject, MutableHandleValue);
static const VMFunction ArrayPopDenseInfo =
@@ -8411,11 +8554,20 @@ CodeGenerator::emitArrayPopShift(LInstruction* lir, const MArrayPopShift* mir, R
// Load elements and length, and VM call if length != initializedLength.
RegisterOrInt32Constant key = RegisterOrInt32Constant(lengthTemp);
- masm.loadPtr(Address(obj, NativeObject::offsetOfElements()), elementsTemp);
- masm.load32(Address(elementsTemp, ObjectElements::offsetOfLength()), lengthTemp);
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC) {
+ masm.loadPtr(Address(obj, NativeObject::offsetOfElements()), elementsTemp);
+ masm.load32(Address(elementsTemp, ObjectElements::offsetOfLength()), lengthTemp);
- Address initLength(elementsTemp, ObjectElements::offsetOfInitializedLength());
- masm.branch32(Assembler::NotEqual, initLength, key, ool->entry());
+ Address initLength(elementsTemp, ObjectElements::offsetOfInitializedLength());
+ masm.branch32(Assembler::NotEqual, initLength, key, ool->entry());
+ } else {
+ masm.loadPtr(Address(obj, UnboxedArrayObject::offsetOfElements()), elementsTemp);
+ masm.load32(Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()), lengthTemp);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), lengthTemp);
+
+ Address lengthAddr(obj, UnboxedArrayObject::offsetOfLength());
+ masm.branch32(Assembler::NotEqual, lengthAddr, key, ool->entry());
+ }
// Test for length != 0. On zero length either take a VM call or generate
// an undefined value, depending on whether the call is known to produce
@@ -8427,10 +8579,13 @@ CodeGenerator::emitArrayPopShift(LInstruction* lir, const MArrayPopShift* mir, R
// According to the spec we need to set the length 0 (which is already 0).
// This is observable when the array length is made non-writable.
- // Handle this case in the OOL.
- Address elementFlags(elementsTemp, ObjectElements::offsetOfFlags());
- Imm32 bit(ObjectElements::NONWRITABLE_ARRAY_LENGTH);
- masm.branchTest32(Assembler::NonZero, elementFlags, bit, ool->entry());
+ // Handle this case in the OOL. When freezing an unboxed array it is converted
+ // to an normal array.
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC) {
+ Address elementFlags(elementsTemp, ObjectElements::offsetOfFlags());
+ Imm32 bit(ObjectElements::NONWRITABLE_ARRAY_LENGTH);
+ masm.branchTest32(Assembler::NonZero, elementFlags, bit, ool->entry());
+ }
masm.moveValue(UndefinedValue(), out.valueReg());
masm.jump(&done);
@@ -8442,25 +8597,41 @@ CodeGenerator::emitArrayPopShift(LInstruction* lir, const MArrayPopShift* mir, R
masm.dec32(&key);
if (mir->mode() == MArrayPopShift::Pop) {
- BaseIndex addr(elementsTemp, lengthTemp, TimesEight);
- masm.loadElementTypedOrValue(addr, out, mir->needsHoleCheck(), ool->entry());
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC) {
+ BaseIndex addr(elementsTemp, lengthTemp, TimesEight);
+ masm.loadElementTypedOrValue(addr, out, mir->needsHoleCheck(), ool->entry());
+ } else {
+ size_t elemSize = UnboxedTypeSize(mir->unboxedType());
+ BaseIndex addr(elementsTemp, lengthTemp, ScaleFromElemWidth(elemSize));
+ masm.loadUnboxedProperty(addr, mir->unboxedType(), out);
+ }
} else {
MOZ_ASSERT(mir->mode() == MArrayPopShift::Shift);
Address addr(elementsTemp, 0);
- masm.loadElementTypedOrValue(addr, out, mir->needsHoleCheck(), ool->entry());
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC)
+ masm.loadElementTypedOrValue(addr, out, mir->needsHoleCheck(), ool->entry());
+ else
+ masm.loadUnboxedProperty(addr, mir->unboxedType(), out);
}
- // Handle the failure case when the array length is non-writable in the
- // OOL path. (Unlike in the adding-an-element cases, we can't rely on the
- // capacity <= length invariant for such arrays to avoid an explicit
- // check.)
- Address elementFlags(elementsTemp, ObjectElements::offsetOfFlags());
- Imm32 bit(ObjectElements::NONWRITABLE_ARRAY_LENGTH);
- masm.branchTest32(Assembler::NonZero, elementFlags, bit, ool->entry());
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC) {
+ // Handle the failure case when the array length is non-writable in the
+ // OOL path. (Unlike in the adding-an-element cases, we can't rely on the
+ // capacity <= length invariant for such arrays to avoid an explicit
+ // check.)
+ Address elementFlags(elementsTemp, ObjectElements::offsetOfFlags());
+ Imm32 bit(ObjectElements::NONWRITABLE_ARRAY_LENGTH);
+ masm.branchTest32(Assembler::NonZero, elementFlags, bit, ool->entry());
- // Now adjust length and initializedLength.
- masm.store32(lengthTemp, Address(elementsTemp, ObjectElements::offsetOfLength()));
- masm.store32(lengthTemp, Address(elementsTemp, ObjectElements::offsetOfInitializedLength()));
+ // Now adjust length and initializedLength.
+ masm.store32(lengthTemp, Address(elementsTemp, ObjectElements::offsetOfLength()));
+ masm.store32(lengthTemp, Address(elementsTemp, ObjectElements::offsetOfInitializedLength()));
+ } else {
+ // Unboxed arrays always have writable lengths. Adjust length and
+ // initializedLength.
+ masm.store32(lengthTemp, Address(obj, UnboxedArrayObject::offsetOfLength()));
+ masm.add32(Imm32(-1), Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()));
+ }
if (mir->mode() == MArrayPopShift::Shift) {
// Don't save the temp registers.
@@ -8499,7 +8670,7 @@ CodeGenerator::visitArrayPopShiftT(LArrayPopShiftT* lir)
emitArrayPopShift(lir, lir->mir(), obj, elements, length, out);
}
-typedef bool (*ArrayPushDenseFn)(JSContext*, HandleArrayObject, HandleValue, uint32_t*);
+typedef bool (*ArrayPushDenseFn)(JSContext*, HandleObject, HandleValue, uint32_t*);
static const VMFunction ArrayPushDenseInfo =
FunctionInfo<ArrayPushDenseFn>(jit::ArrayPushDense, "ArrayPushDense");
@@ -8510,27 +8681,50 @@ CodeGenerator::emitArrayPush(LInstruction* lir, const MArrayPush* mir, Register
OutOfLineCode* ool = oolCallVM(ArrayPushDenseInfo, lir, ArgList(obj, value), StoreRegisterTo(length));
RegisterOrInt32Constant key = RegisterOrInt32Constant(length);
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC) {
+ // Load elements and length.
+ masm.loadPtr(Address(obj, NativeObject::offsetOfElements()), elementsTemp);
+ masm.load32(Address(elementsTemp, ObjectElements::offsetOfLength()), length);
+
+ // Guard length == initializedLength.
+ Address initLength(elementsTemp, ObjectElements::offsetOfInitializedLength());
+ masm.branch32(Assembler::NotEqual, initLength, key, ool->entry());
- // Load elements and length.
- masm.loadPtr(Address(obj, NativeObject::offsetOfElements()), elementsTemp);
- masm.load32(Address(elementsTemp, ObjectElements::offsetOfLength()), length);
+ // Guard length < capacity.
+ Address capacity(elementsTemp, ObjectElements::offsetOfCapacity());
+ masm.branch32(Assembler::BelowOrEqual, capacity, key, ool->entry());
- // Guard length == initializedLength.
- Address initLength(elementsTemp, ObjectElements::offsetOfInitializedLength());
- masm.branch32(Assembler::NotEqual, initLength, key, ool->entry());
+ // Do the store.
+ masm.storeConstantOrRegister(value, BaseIndex(elementsTemp, length, TimesEight));
+ } else {
+ // Load initialized length.
+ masm.load32(Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()), length);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), length);
- // Guard length < capacity.
- Address capacity(elementsTemp, ObjectElements::offsetOfCapacity());
- masm.branch32(Assembler::BelowOrEqual, capacity, key, ool->entry());
+ // Guard length == initializedLength.
+ Address lengthAddr(obj, UnboxedArrayObject::offsetOfLength());
+ masm.branch32(Assembler::NotEqual, lengthAddr, key, ool->entry());
- // Do the store.
- masm.storeConstantOrRegister(value, BaseIndex(elementsTemp, length, TimesEight));
+ // Guard length < capacity.
+ masm.checkUnboxedArrayCapacity(obj, key, elementsTemp, ool->entry());
+
+ // Load elements and do the store.
+ masm.loadPtr(Address(obj, UnboxedArrayObject::offsetOfElements()), elementsTemp);
+ size_t elemSize = UnboxedTypeSize(mir->unboxedType());
+ BaseIndex addr(elementsTemp, length, ScaleFromElemWidth(elemSize));
+ masm.storeUnboxedProperty(addr, mir->unboxedType(), value, nullptr);
+ }
masm.inc32(&key);
// Update length and initialized length.
- masm.store32(length, Address(elementsTemp, ObjectElements::offsetOfLength()));
- masm.store32(length, Address(elementsTemp, ObjectElements::offsetOfInitializedLength()));
+ if (mir->unboxedType() == JSVAL_TYPE_MAGIC) {
+ masm.store32(length, Address(elementsTemp, ObjectElements::offsetOfLength()));
+ masm.store32(length, Address(elementsTemp, ObjectElements::offsetOfInitializedLength()));
+ } else {
+ masm.store32(length, Address(obj, UnboxedArrayObject::offsetOfLength()));
+ masm.add32(Imm32(1), Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()));
+ }
masm.bind(ool->rejoin());
}
@@ -10357,11 +10551,22 @@ CodeGenerator::visitLoadElementHole(LLoadElementHole* lir)
else
masm.branch32(Assembler::BelowOrEqual, initLength, ToRegister(lir->index()), &undefined);
- if (lir->index()->isConstant()) {
- NativeObject::elementsSizeMustNotOverflow();
- masm.loadValue(Address(elements, ToInt32(lir->index()) * sizeof(Value)), out);
+ if (mir->unboxedType() != JSVAL_TYPE_MAGIC) {
+ size_t width = UnboxedTypeSize(mir->unboxedType());
+ if (lir->index()->isConstant()) {
+ Address addr(elements, ToInt32(lir->index()) * width);
+ masm.loadUnboxedProperty(addr, mir->unboxedType(), out);
+ } else {
+ BaseIndex addr(elements, ToRegister(lir->index()), ScaleFromElemWidth(width));
+ masm.loadUnboxedProperty(addr, mir->unboxedType(), out);
+ }
} else {
- masm.loadValue(BaseObjectElementIndex(elements, ToRegister(lir->index())), out);
+ if (lir->index()->isConstant()) {
+ NativeObject::elementsSizeMustNotOverflow();
+ masm.loadValue(Address(elements, ToInt32(lir->index()) * sizeof(Value)), out);
+ } else {
+ masm.loadValue(BaseObjectElementIndex(elements, ToRegister(lir->index())), out);
+ }
}
// If a hole check is needed, and the value wasn't a hole, we're done.
@@ -10739,7 +10944,7 @@ CodeGenerator::visitInArray(LInArray* lir)
}
masm.branch32(Assembler::BelowOrEqual, initLength, Imm32(index), failedInitLength);
- if (mir->needsHoleCheck()) {
+ if (mir->needsHoleCheck() && mir->unboxedType() == JSVAL_TYPE_MAGIC) {
NativeObject::elementsSizeMustNotOverflow();
Address address = Address(elements, index * sizeof(Value));
masm.branchTestMagic(Assembler::Equal, address, &falseBranch);
@@ -10752,7 +10957,7 @@ CodeGenerator::visitInArray(LInArray* lir)
failedInitLength = &negativeIntCheck;
masm.branch32(Assembler::BelowOrEqual, initLength, index, failedInitLength);
- if (mir->needsHoleCheck()) {
+ if (mir->needsHoleCheck() && mir->unboxedType() == JSVAL_TYPE_MAGIC) {
BaseIndex address = BaseIndex(elements, ToRegister(lir->index()), TimesEight);
masm.branchTestMagic(Assembler::Equal, address, &falseBranch);
}
diff --git a/js/src/jit/CodeGenerator.h b/js/src/jit/CodeGenerator.h
index 65acfe274..bc8fcccea 100644
--- a/js/src/jit/CodeGenerator.h
+++ b/js/src/jit/CodeGenerator.h
@@ -234,6 +234,10 @@ class CodeGenerator final : public CodeGeneratorSpecific
void visitSubstr(LSubstr* lir);
void visitInitializedLength(LInitializedLength* lir);
void visitSetInitializedLength(LSetInitializedLength* lir);
+ void visitUnboxedArrayLength(LUnboxedArrayLength* lir);
+ void visitUnboxedArrayInitializedLength(LUnboxedArrayInitializedLength* lir);
+ void visitIncrementUnboxedArrayInitializedLength(LIncrementUnboxedArrayInitializedLength* lir);
+ void visitSetUnboxedArrayInitializedLength(LSetUnboxedArrayInitializedLength* lir);
void visitNotO(LNotO* ins);
void visitNotV(LNotV* ins);
void visitBoundsCheck(LBoundsCheck* lir);
diff --git a/js/src/jit/IonBuilder.cpp b/js/src/jit/IonBuilder.cpp
index f00167d92..a5991cc7b 100644
--- a/js/src/jit/IonBuilder.cpp
+++ b/js/src/jit/IonBuilder.cpp
@@ -2227,8 +2227,6 @@ IonBuilder::inspectOpcode(JSOp op)
// update that stale value.
#endif
default:
- // Any unused opcodes and JSOP_LIMIT will end up here without having
- // to explicitly specify
break;
}
@@ -7355,6 +7353,12 @@ IonBuilder::newArrayTryTemplateObject(bool* emitted, JSObject* templateObject, u
if (!templateObject)
return true;
+ if (templateObject->is<UnboxedArrayObject>()) {
+ MOZ_ASSERT(templateObject->as<UnboxedArrayObject>().capacity() >= length);
+ if (!templateObject->as<UnboxedArrayObject>().hasInlineElements())
+ return true;
+ }
+
MOZ_ASSERT(length <= NativeObject::MAX_DENSE_ELEMENTS_COUNT);
size_t arraySlots =
@@ -7610,6 +7614,7 @@ IonBuilder::jsop_initelem_array()
// intializer, and that arrays are marked as non-packed when writing holes
// to them during initialization.
bool needStub = false;
+ JSValueType unboxedType = JSVAL_TYPE_MAGIC;
if (shouldAbortOnPreliminaryGroups(obj)) {
needStub = true;
} else if (!obj->resultTypeSet() ||
@@ -7620,6 +7625,12 @@ IonBuilder::jsop_initelem_array()
} else {
MOZ_ASSERT(obj->resultTypeSet()->getObjectCount() == 1);
TypeSet::ObjectKey* initializer = obj->resultTypeSet()->getObject(0);
+ if (initializer->clasp() == &UnboxedArrayObject::class_) {
+ if (initializer->group()->unboxedLayout().nativeGroup())
+ needStub = true;
+ else
+ unboxedType = initializer->group()->unboxedLayout().elementType();
+ }
if (value->type() == MIRType::MagicHole) {
if (!initializer->hasFlags(constraints(), OBJECT_FLAG_NON_PACKED))
needStub = true;
@@ -7639,46 +7650,60 @@ IonBuilder::jsop_initelem_array()
return resumeAfter(store);
}
- return initializeArrayElement(obj, index, value, /* addResumePoint = */ true);
+ return initializeArrayElement(obj, index, value, unboxedType, /* addResumePoint = */ true);
}
bool
IonBuilder::initializeArrayElement(MDefinition* obj, size_t index, MDefinition* value,
+ JSValueType unboxedType,
bool addResumePointAndIncrementInitializedLength)
{
MConstant* id = MConstant::New(alloc(), Int32Value(index));
current->add(id);
// Get the elements vector.
- MElements* elements = MElements::New(alloc(), obj);
+ MElements* elements = MElements::New(alloc(), obj, unboxedType != JSVAL_TYPE_MAGIC);
current->add(elements);
- if (NeedsPostBarrier(value))
- current->add(MPostWriteBarrier::New(alloc(), obj, value));
+ if (unboxedType != JSVAL_TYPE_MAGIC) {
+ // Note: storeUnboxedValue takes care of any post barriers on the value.
+ storeUnboxedValue(obj, elements, 0, id, unboxedType, value, /* preBarrier = */ false);
- if ((obj->isNewArray() && obj->toNewArray()->convertDoubleElements()) ||
- (obj->isNullarySharedStub() &&
- obj->resultTypeSet()->convertDoubleElements(constraints()) == TemporaryTypeSet::AlwaysConvertToDoubles))
- {
- MInstruction* valueDouble = MToDouble::New(alloc(), value);
- current->add(valueDouble);
- value = valueDouble;
- }
+ if (addResumePointAndIncrementInitializedLength) {
+ MInstruction* increment = MIncrementUnboxedArrayInitializedLength::New(alloc(), obj);
+ current->add(increment);
- // Store the value.
- MStoreElement* store = MStoreElement::New(alloc(), elements, id, value,
+ if (!resumeAfter(increment))
+ return false;
+ }
+ } else {
+ if (NeedsPostBarrier(value))
+ current->add(MPostWriteBarrier::New(alloc(), obj, value));
+
+ if ((obj->isNewArray() && obj->toNewArray()->convertDoubleElements()) ||
+ (obj->isNullarySharedStub() &&
+ obj->resultTypeSet()->convertDoubleElements(constraints()) == TemporaryTypeSet::AlwaysConvertToDoubles))
+ {
+ MInstruction* valueDouble = MToDouble::New(alloc(), value);
+ current->add(valueDouble);
+ value = valueDouble;
+ }
+
+ // Store the value.
+ MStoreElement* store = MStoreElement::New(alloc(), elements, id, value,
/* needsHoleCheck = */ false);
- current->add(store);
+ current->add(store);
- if (addResumePointAndIncrementInitializedLength) {
- // Update the initialized length. (The template object for this
- // array has the array's ultimate length, so the length field is
- // already correct: no updating needed.)
- MSetInitializedLength* initLength = MSetInitializedLength::New(alloc(), elements, id);
- current->add(initLength);
+ if (addResumePointAndIncrementInitializedLength) {
+ // Update the initialized length. (The template object for this
+ // array has the array's ultimate length, so the length field is
+ // already correct: no updating needed.)
+ MSetInitializedLength* initLength = MSetInitializedLength::New(alloc(), elements, id);
+ current->add(initLength);
- if (!resumeAfter(initLength))
- return false;
+ if (!resumeAfter(initLength))
+ return false;
+ }
}
return true;
@@ -8167,7 +8192,8 @@ IonBuilder::maybeMarkEmpty(MDefinition* ins)
static bool
ClassHasEffectlessLookup(const Class* clasp)
{
- return IsTypedObjectClass(clasp) ||
+ return (clasp == &UnboxedArrayObject::class_) ||
+ IsTypedObjectClass(clasp) ||
(clasp->isNative() && !clasp->getOpsLookupProperty());
}
@@ -9441,9 +9467,12 @@ IonBuilder::getElemTryDense(bool* emitted, MDefinition* obj, MDefinition* index)
{
MOZ_ASSERT(*emitted == false);
- if (!ElementAccessIsDenseNative(constraints(), obj, index)) {
- trackOptimizationOutcome(TrackedOutcome::AccessNotDense);
- return true;
+ JSValueType unboxedType = UnboxedArrayElementType(constraints(), obj, index);
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ if (!ElementAccessIsDenseNative(constraints(), obj, index)) {
+ trackOptimizationOutcome(TrackedOutcome::AccessNotDense);
+ return true;
+ }
}
// Don't generate a fast path if there have been bounds check failures
@@ -9460,7 +9489,7 @@ IonBuilder::getElemTryDense(bool* emitted, MDefinition* obj, MDefinition* index)
return true;
}
- if (!jsop_getelem_dense(obj, index))
+ if (!jsop_getelem_dense(obj, index, unboxedType))
return false;
trackOptimizationSuccess();
@@ -9812,7 +9841,7 @@ IonBuilder::computeHeapType(const TemporaryTypeSet* objTypes, const jsid id)
}
bool
-IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index)
+IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index, JSValueType unboxedType)
{
TemporaryTypeSet* types = bytecodeTypes(pc);
@@ -9836,7 +9865,7 @@ IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index)
!ElementAccessHasExtraIndexedProperty(this, obj);
MIRType knownType = MIRType::Value;
- if (barrier == BarrierKind::NoBarrier)
+ if (unboxedType == JSVAL_TYPE_MAGIC && barrier == BarrierKind::NoBarrier)
knownType = GetElemKnownType(needsHoleCheck, types);
// Ensure index is an integer.
@@ -9845,13 +9874,13 @@ IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index)
index = idInt32;
// Get the elements vector.
- MInstruction* elements = MElements::New(alloc(), obj);
+ MInstruction* elements = MElements::New(alloc(), obj, unboxedType != JSVAL_TYPE_MAGIC);
current->add(elements);
// Note: to help GVN, use the original MElements instruction and not
// MConvertElementsToDoubles as operand. This is fine because converting
// elements to double does not change the initialized length.
- MInstruction* initLength = initializedLength(obj, elements);
+ MInstruction* initLength = initializedLength(obj, elements, unboxedType);
// If we can load the element as a definite double, make sure to check that
// the array has been converted to homogenous doubles first.
@@ -9867,6 +9896,7 @@ IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index)
}
bool loadDouble =
+ unboxedType == JSVAL_TYPE_MAGIC &&
barrier == BarrierKind::NoBarrier &&
loopDepth_ &&
inBounds &&
@@ -9885,13 +9915,18 @@ IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index)
// hoisting.
index = addBoundsCheck(index, initLength);
- load = MLoadElement::New(alloc(), elements, index, needsHoleCheck, loadDouble);
- current->add(load);
+ if (unboxedType != JSVAL_TYPE_MAGIC) {
+ load = loadUnboxedValue(elements, 0, index, unboxedType, barrier, types);
+ } else {
+ load = MLoadElement::New(alloc(), elements, index, needsHoleCheck, loadDouble);
+ current->add(load);
+ }
} else {
// This load may return undefined, so assume that we *can* read holes,
// or that we can read out-of-bounds accesses. In this case, the bounds
// check is part of the opcode.
- load = MLoadElementHole::New(alloc(), elements, index, initLength, needsHoleCheck);
+ load = MLoadElementHole::New(alloc(), elements, index, initLength,
+ unboxedType, needsHoleCheck);
current->add(load);
// If maybeUndefined was true, the typeset must have undefined, and
@@ -9901,7 +9936,8 @@ IonBuilder::jsop_getelem_dense(MDefinition* obj, MDefinition* index)
}
if (knownType != MIRType::Value) {
- load->setResultType(knownType);
+ if (unboxedType == JSVAL_TYPE_MAGIC)
+ load->setResultType(knownType);
load->setResultTypeSet(types);
}
@@ -10348,9 +10384,12 @@ IonBuilder::setElemTryDense(bool* emitted, MDefinition* object,
{
MOZ_ASSERT(*emitted == false);
- if (!ElementAccessIsDenseNative(constraints(), object, index)) {
- trackOptimizationOutcome(TrackedOutcome::AccessNotDense);
- return true;
+ JSValueType unboxedType = UnboxedArrayElementType(constraints(), object, index);
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ if (!ElementAccessIsDenseNative(constraints(), object, index)) {
+ trackOptimizationOutcome(TrackedOutcome::AccessNotDense);
+ return true;
+ }
}
if (PropertyWriteNeedsTypeBarrier(alloc(), constraints(), current,
@@ -10384,7 +10423,7 @@ IonBuilder::setElemTryDense(bool* emitted, MDefinition* object,
}
// Emit dense setelem variant.
- if (!jsop_setelem_dense(conversion, object, index, value, writeHole, emitted))
+ if (!jsop_setelem_dense(conversion, object, index, value, unboxedType, writeHole, emitted))
return false;
if (!*emitted) {
@@ -10474,11 +10513,13 @@ IonBuilder::setElemTryCache(bool* emitted, MDefinition* object,
bool
IonBuilder::jsop_setelem_dense(TemporaryTypeSet::DoubleConversion conversion,
MDefinition* obj, MDefinition* id, MDefinition* value,
- bool writeHole, bool* emitted)
+ JSValueType unboxedType, bool writeHole, bool* emitted)
{
MOZ_ASSERT(*emitted == false);
- MIRType elementType = DenseNativeElementType(constraints(), obj);
+ MIRType elementType = MIRType::None;
+ if (unboxedType == JSVAL_TYPE_MAGIC)
+ elementType = DenseNativeElementType(constraints(), obj);
bool packed = ElementAccessIsPacked(constraints(), obj);
// Writes which are on holes in the object do not have to bail out if they
@@ -10508,7 +10549,7 @@ IonBuilder::jsop_setelem_dense(TemporaryTypeSet::DoubleConversion conversion,
obj = addMaybeCopyElementsForWrite(obj, /* checkNative = */ false);
// Get the elements vector.
- MElements* elements = MElements::New(alloc(), obj);
+ MElements* elements = MElements::New(alloc(), obj, unboxedType != JSVAL_TYPE_MAGIC);
current->add(elements);
// Ensure the value is a double, if double conversion might be needed.
@@ -10545,7 +10586,7 @@ IonBuilder::jsop_setelem_dense(TemporaryTypeSet::DoubleConversion conversion,
MInstruction* store;
MStoreElementCommon* common = nullptr;
if (writeHole && hasNoExtraIndexedProperty && !mayBeFrozen) {
- MStoreElementHole* ins = MStoreElementHole::New(alloc(), obj, elements, id, newValue);
+ MStoreElementHole* ins = MStoreElementHole::New(alloc(), obj, elements, id, newValue, unboxedType);
store = ins;
common = ins;
@@ -10557,23 +10598,27 @@ IonBuilder::jsop_setelem_dense(TemporaryTypeSet::DoubleConversion conversion,
bool strict = IsStrictSetPC(pc);
MFallibleStoreElement* ins = MFallibleStoreElement::New(alloc(), obj, elements, id,
- newValue, strict);
+ newValue, unboxedType, strict);
store = ins;
common = ins;
current->add(ins);
current->push(value);
} else {
- MInstruction* initLength = initializedLength(obj, elements);
+ MInstruction* initLength = initializedLength(obj, elements, unboxedType);
id = addBoundsCheck(id, initLength);
bool needsHoleCheck = !packed && !hasNoExtraIndexedProperty;
- MStoreElement* ins = MStoreElement::New(alloc(), elements, id, newValue, needsHoleCheck);
- store = ins;
- common = ins;
+ if (unboxedType != JSVAL_TYPE_MAGIC) {
+ store = storeUnboxedValue(obj, elements, 0, id, unboxedType, newValue);
+ } else {
+ MStoreElement* ins = MStoreElement::New(alloc(), elements, id, newValue, needsHoleCheck);
+ store = ins;
+ common = ins;
- current->add(store);
+ current->add(store);
+ }
current->push(value);
}
@@ -10691,6 +10736,18 @@ IonBuilder::jsop_length_fastPath()
return true;
}
+ // Compute the length for unboxed array objects.
+ if (UnboxedArrayElementType(constraints(), obj, nullptr) != JSVAL_TYPE_MAGIC &&
+ !objTypes->hasObjectFlags(constraints(), OBJECT_FLAG_LENGTH_OVERFLOW))
+ {
+ current->pop();
+
+ MUnboxedArrayLength* length = MUnboxedArrayLength::New(alloc(), obj);
+ current->add(length);
+ current->push(length);
+ return true;
+ }
+
// Compute the length for array typed objects.
TypedObjectPrediction prediction = typedObjectPrediction(obj);
if (!prediction.isUseless()) {
@@ -13675,8 +13732,11 @@ IonBuilder::inTryDense(bool* emitted, MDefinition* obj, MDefinition* id)
if (shouldAbortOnPreliminaryGroups(obj))
return true;
- if (!ElementAccessIsDenseNative(constraints(), obj, id))
- return true;
+ JSValueType unboxedType = UnboxedArrayElementType(constraints(), obj, id);
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ if (!ElementAccessIsDenseNative(constraints(), obj, id))
+ return true;
+ }
if (ElementAccessHasExtraIndexedProperty(this, obj))
return true;
@@ -13691,10 +13751,10 @@ IonBuilder::inTryDense(bool* emitted, MDefinition* obj, MDefinition* id)
id = idInt32;
// Get the elements vector.
- MElements* elements = MElements::New(alloc(), obj);
+ MElements* elements = MElements::New(alloc(), obj, unboxedType != JSVAL_TYPE_MAGIC);
current->add(elements);
- MInstruction* initLength = initializedLength(obj, elements);
+ MInstruction* initLength = initializedLength(obj, elements, unboxedType);
// If there are no holes, speculate the InArray check will not fail.
if (!needsHoleCheck && !failedBoundsCheck_) {
@@ -13704,7 +13764,8 @@ IonBuilder::inTryDense(bool* emitted, MDefinition* obj, MDefinition* id)
}
// Check if id < initLength and elem[id] not a hole.
- MInArray* ins = MInArray::New(alloc(), elements, id, initLength, obj, needsHoleCheck);
+ MInArray* ins = MInArray::New(alloc(), elements, id, initLength, obj, needsHoleCheck,
+ unboxedType);
current->add(ins);
current->push(ins);
@@ -14382,24 +14443,32 @@ IonBuilder::constantInt(int32_t i)
}
MInstruction*
-IonBuilder::initializedLength(MDefinition* obj, MDefinition* elements)
+IonBuilder::initializedLength(MDefinition* obj, MDefinition* elements, JSValueType unboxedType)
{
- MInstruction* res = MInitializedLength::New(alloc(), elements);
+ MInstruction* res;
+ if (unboxedType != JSVAL_TYPE_MAGIC)
+ res = MUnboxedArrayInitializedLength::New(alloc(), obj);
+ else
+ res = MInitializedLength::New(alloc(), elements);
current->add(res);
return res;
}
MInstruction*
-IonBuilder::setInitializedLength(MDefinition* obj, size_t count)
+IonBuilder::setInitializedLength(MDefinition* obj, JSValueType unboxedType, size_t count)
{
MOZ_ASSERT(count);
- // MSetInitializedLength takes the index of the last element, rather
- // than the count itself.
- MInstruction* elements = MElements::New(alloc(), obj, /* unboxed = */ false);
- current->add(elements);
- MInstruction* res =
- MSetInitializedLength::New(alloc(), elements, constant(Int32Value(count - 1)));
+ MInstruction* res;
+ if (unboxedType != JSVAL_TYPE_MAGIC) {
+ res = MSetUnboxedArrayInitializedLength::New(alloc(), obj, constant(Int32Value(count)));
+ } else {
+ // MSetInitializedLength takes the index of the last element, rather
+ // than the count itself.
+ MInstruction* elements = MElements::New(alloc(), obj, /* unboxed = */ false);
+ current->add(elements);
+ res = MSetInitializedLength::New(alloc(), elements, constant(Int32Value(count - 1)));
+ }
current->add(res);
return res;
}
diff --git a/js/src/jit/IonBuilder.h b/js/src/jit/IonBuilder.h
index 78af0e412..1f84b45df 100644
--- a/js/src/jit/IonBuilder.h
+++ b/js/src/jit/IonBuilder.h
@@ -346,8 +346,9 @@ class IonBuilder
MConstant* constant(const Value& v);
MConstant* constantInt(int32_t i);
- MInstruction* initializedLength(MDefinition* obj, MDefinition* elements);
- MInstruction* setInitializedLength(MDefinition* obj, size_t count);
+ MInstruction* initializedLength(MDefinition* obj, MDefinition* elements,
+ JSValueType unboxedType);
+ MInstruction* setInitializedLength(MDefinition* obj, JSValueType unboxedType, size_t count);
// Improve the type information at tests
MOZ_MUST_USE bool improveTypesAtTest(MDefinition* ins, bool trueBranch, MTest* test);
@@ -610,6 +611,7 @@ class IonBuilder
TypedObjectPrediction elemTypeReprs,
uint32_t elemSize);
MOZ_MUST_USE bool initializeArrayElement(MDefinition* obj, size_t index, MDefinition* value,
+ JSValueType unboxedType,
bool addResumePointAndIncrementInitializedLength);
// jsop_getelem() helpers.
@@ -722,13 +724,15 @@ class IonBuilder
MOZ_MUST_USE bool jsop_bindname(PropertyName* name);
MOZ_MUST_USE bool jsop_bindvar();
MOZ_MUST_USE bool jsop_getelem();
- MOZ_MUST_USE bool jsop_getelem_dense(MDefinition* obj, MDefinition* index);
+ MOZ_MUST_USE bool jsop_getelem_dense(MDefinition* obj, MDefinition* index,
+ JSValueType unboxedType);
MOZ_MUST_USE bool jsop_getelem_typed(MDefinition* obj, MDefinition* index,
ScalarTypeDescr::Type arrayType);
MOZ_MUST_USE bool jsop_setelem();
MOZ_MUST_USE bool jsop_setelem_dense(TemporaryTypeSet::DoubleConversion conversion,
MDefinition* object, MDefinition* index,
- MDefinition* value, bool writeHole, bool* emitted);
+ MDefinition* value, JSValueType unboxedType,
+ bool writeHole, bool* emitted);
MOZ_MUST_USE bool jsop_setelem_typed(ScalarTypeDescr::Type arrayType,
MDefinition* object, MDefinition* index,
MDefinition* value);
diff --git a/js/src/jit/IonCaches.cpp b/js/src/jit/IonCaches.cpp
index f5e4659c1..c2dc57373 100644
--- a/js/src/jit/IonCaches.cpp
+++ b/js/src/jit/IonCaches.cpp
@@ -639,6 +639,9 @@ TestMatchingReceiver(MacroAssembler& masm, IonCache::StubAttacher& attacher,
} else {
masm.branchPtr(Assembler::NotEqual, expandoAddress, ImmWord(0), failure);
}
+ } else if (obj->is<UnboxedArrayObject>()) {
+ MOZ_ASSERT(failure);
+ masm.branchTestObjGroup(Assembler::NotEqual, object, obj->group(), failure);
} else if (obj->is<TypedObject>()) {
attacher.branchNextStubOrLabel(masm, Assembler::NotEqual,
Address(object, JSObject::offsetOfGroup()),
@@ -1185,6 +1188,39 @@ GenerateArrayLength(JSContext* cx, MacroAssembler& masm, IonCache::StubAttacher&
return true;
}
+static void
+GenerateUnboxedArrayLength(JSContext* cx, MacroAssembler& masm, IonCache::StubAttacher& attacher,
+ JSObject* array, Register object, TypedOrValueRegister output,
+ Label* failures)
+{
+ Register outReg;
+ if (output.hasValue()) {
+ outReg = output.valueReg().scratchReg();
+ } else {
+ MOZ_ASSERT(output.type() == MIRType::Int32);
+ outReg = output.typedReg().gpr();
+ }
+ MOZ_ASSERT(object != outReg);
+
+ TestMatchingReceiver(masm, attacher, object, array, failures);
+
+ // Load length.
+ masm.load32(Address(object, UnboxedArrayObject::offsetOfLength()), outReg);
+
+ // Check for a length that fits in an int32.
+ masm.branchTest32(Assembler::Signed, outReg, outReg, failures);
+
+ if (output.hasValue())
+ masm.tagValue(JSVAL_TYPE_INT32, outReg, output.valueReg());
+
+ // Success.
+ attacher.jumpRejoin(masm);
+
+ // Failure.
+ masm.bind(failures);
+ attacher.jumpNextStub(masm);
+}
+
// In this case, the code for TypedArray and SharedTypedArray is not the same,
// because the code embeds pointers to the respective class arrays. Code that
// caches the stub code must distinguish between the two cases.
@@ -1559,6 +1595,40 @@ GetPropertyIC::tryAttachUnboxedExpando(JSContext* cx, HandleScript outerScript,
}
bool
+GetPropertyIC::tryAttachUnboxedArrayLength(JSContext* cx, HandleScript outerScript, IonScript* ion,
+ HandleObject obj, HandleId id, void* returnAddr,
+ bool* emitted)
+{
+ MOZ_ASSERT(canAttachStub());
+ MOZ_ASSERT(!*emitted);
+ MOZ_ASSERT(outerScript->ionScript() == ion);
+
+ if (!obj->is<UnboxedArrayObject>())
+ return true;
+
+ if (!JSID_IS_ATOM(id, cx->names().length))
+ return true;
+
+ if (obj->as<UnboxedArrayObject>().length() > INT32_MAX)
+ return true;
+
+ if (!allowArrayLength(cx))
+ return true;
+
+ *emitted = true;
+
+ MacroAssembler masm(cx, ion, outerScript, profilerLeavePc_);
+
+ Label failures;
+ emitIdGuard(masm, id, &failures);
+
+ StubAttacher attacher(*this);
+ GenerateUnboxedArrayLength(cx, masm, attacher, obj, object(), output(), &failures);
+ return linkAndAttachStub(cx, masm, attacher, ion, "unboxed array length",
+ JS::TrackedOutcome::ICGetPropStub_UnboxedArrayLength);
+}
+
+bool
GetPropertyIC::tryAttachTypedArrayLength(JSContext* cx, HandleScript outerScript, IonScript* ion,
HandleObject obj, HandleId id, bool* emitted)
{
@@ -2133,6 +2203,9 @@ GetPropertyIC::tryAttachStub(JSContext* cx, HandleScript outerScript, IonScript*
if (!*emitted && !tryAttachUnboxedExpando(cx, outerScript, ion, obj, id, returnAddr, emitted))
return false;
+ if (!*emitted && !tryAttachUnboxedArrayLength(cx, outerScript, ion, obj, id, returnAddr, emitted))
+ return false;
+
if (!*emitted && !tryAttachTypedArrayLength(cx, outerScript, ion, obj, id, emitted))
return false;
}
@@ -3953,7 +4026,7 @@ GetPropertyIC::tryAttachDenseElementHole(JSContext* cx, HandleScript outerScript
GetPropertyIC::canAttachTypedOrUnboxedArrayElement(JSObject* obj, const Value& idval,
TypedOrValueRegister output)
{
- if (!obj->is<TypedArrayObject>())
+ if (!obj->is<TypedArrayObject>() && !obj->is<UnboxedArrayObject>())
return false;
MOZ_ASSERT(idval.isInt32() || idval.isString());
@@ -3984,6 +4057,13 @@ GetPropertyIC::canAttachTypedOrUnboxedArrayElement(JSObject* obj, const Value& i
return output.hasValue() || !output.typedReg().isFloat();
}
+ if (index >= obj->as<UnboxedArrayObject>().initializedLength())
+ return false;
+
+ JSValueType elementType = obj->as<UnboxedArrayObject>().elementType();
+ if (elementType == JSVAL_TYPE_DOUBLE)
+ return output.hasValue();
+
return output.hasValue() || !output.typedReg().isFloat();
}
@@ -4060,27 +4140,46 @@ GenerateGetTypedOrUnboxedArrayElement(JSContext* cx, MacroAssembler& masm,
Label popObjectAndFail;
- // Guard on the initialized length.
- Address length(object, TypedArrayObject::lengthOffset());
- masm.branch32(Assembler::BelowOrEqual, length, indexReg, &failures);
+ if (array->is<TypedArrayObject>()) {
+ // Guard on the initialized length.
+ Address length(object, TypedArrayObject::lengthOffset());
+ masm.branch32(Assembler::BelowOrEqual, length, indexReg, &failures);
- // Save the object register on the stack in case of failure.
- Register elementReg = object;
- masm.push(object);
+ // Save the object register on the stack in case of failure.
+ Register elementReg = object;
+ masm.push(object);
- // Load elements vector.
- masm.loadPtr(Address(object, TypedArrayObject::dataOffset()), elementReg);
+ // Load elements vector.
+ masm.loadPtr(Address(object, TypedArrayObject::dataOffset()), elementReg);
- // Load the value. We use an invalid register because the destination
- // register is necessary a non double register.
- Scalar::Type arrayType = array->as<TypedArrayObject>().type();
- int width = Scalar::byteSize(arrayType);
- BaseIndex source(elementReg, indexReg, ScaleFromElemWidth(width));
- if (output.hasValue()) {
- masm.loadFromTypedArray(arrayType, source, output.valueReg(), allowDoubleResult,
- elementReg, &popObjectAndFail);
+ // Load the value. We use an invalid register because the destination
+ // register is necessary a non double register.
+ Scalar::Type arrayType = array->as<TypedArrayObject>().type();
+ int width = Scalar::byteSize(arrayType);
+ BaseIndex source(elementReg, indexReg, ScaleFromElemWidth(width));
+ if (output.hasValue()) {
+ masm.loadFromTypedArray(arrayType, source, output.valueReg(), allowDoubleResult,
+ elementReg, &popObjectAndFail);
+ } else {
+ masm.loadFromTypedArray(arrayType, source, output.typedReg(), elementReg, &popObjectAndFail);
+ }
} else {
- masm.loadFromTypedArray(arrayType, source, output.typedReg(), elementReg, &popObjectAndFail);
+ // Save the object register on the stack in case of failure.
+ masm.push(object);
+
+ // Guard on the initialized length.
+ masm.load32(Address(object, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()), object);
+ masm.and32(Imm32(UnboxedArrayObject::InitializedLengthMask), object);
+ masm.branch32(Assembler::BelowOrEqual, object, indexReg, &popObjectAndFail);
+
+ // Load elements vector.
+ Register elementReg = object;
+ masm.loadPtr(Address(masm.getStackPointer(), 0), object);
+ masm.loadPtr(Address(object, UnboxedArrayObject::offsetOfElements()), elementReg);
+
+ JSValueType elementType = array->as<UnboxedArrayObject>().elementType();
+ BaseIndex source(elementReg, indexReg, ScaleFromElemWidth(UnboxedTypeSize(elementType)));
+ masm.loadUnboxedProperty(source, elementType, output);
}
masm.pop(object);
diff --git a/js/src/jit/Lowering.cpp b/js/src/jit/Lowering.cpp
index 108450983..c3bd47744 100644
--- a/js/src/jit/Lowering.cpp
+++ b/js/src/jit/Lowering.cpp
@@ -2895,6 +2895,32 @@ LIRGenerator::visitSetInitializedLength(MSetInitializedLength* ins)
}
void
+LIRGenerator::visitUnboxedArrayLength(MUnboxedArrayLength* ins)
+{
+ define(new(alloc()) LUnboxedArrayLength(useRegisterAtStart(ins->object())), ins);
+}
+
+void
+LIRGenerator::visitUnboxedArrayInitializedLength(MUnboxedArrayInitializedLength* ins)
+{
+ define(new(alloc()) LUnboxedArrayInitializedLength(useRegisterAtStart(ins->object())), ins);
+}
+
+void
+LIRGenerator::visitIncrementUnboxedArrayInitializedLength(MIncrementUnboxedArrayInitializedLength* ins)
+{
+ add(new(alloc()) LIncrementUnboxedArrayInitializedLength(useRegister(ins->object())), ins);
+}
+
+void
+LIRGenerator::visitSetUnboxedArrayInitializedLength(MSetUnboxedArrayInitializedLength* ins)
+{
+ add(new(alloc()) LSetUnboxedArrayInitializedLength(useRegister(ins->object()),
+ useRegisterOrConstant(ins->length()),
+ temp()), ins);
+}
+
+void
LIRGenerator::visitNot(MNot* ins)
{
MDefinition* op = ins->input();
@@ -3143,16 +3169,22 @@ LIRGenerator::visitStoreElementHole(MStoreElementHole* ins)
const LUse elements = useRegister(ins->elements());
const LAllocation index = useRegisterOrConstant(ins->index());
+ // Use a temp register when adding new elements to unboxed arrays.
+ LDefinition tempDef = LDefinition::BogusTemp();
+ if (ins->unboxedType() != JSVAL_TYPE_MAGIC)
+ tempDef = temp();
+
LInstruction* lir;
switch (ins->value()->type()) {
case MIRType::Value:
- lir = new(alloc()) LStoreElementHoleV(object, elements, index, useBox(ins->value()));
+ lir = new(alloc()) LStoreElementHoleV(object, elements, index, useBox(ins->value()),
+ tempDef);
break;
default:
{
const LAllocation value = useRegisterOrNonDoubleConstant(ins->value());
- lir = new(alloc()) LStoreElementHoleT(object, elements, index, value);
+ lir = new(alloc()) LStoreElementHoleT(object, elements, index, value, tempDef);
break;
}
}
@@ -3171,14 +3203,20 @@ LIRGenerator::visitFallibleStoreElement(MFallibleStoreElement* ins)
const LUse elements = useRegister(ins->elements());
const LAllocation index = useRegisterOrConstant(ins->index());
+ // Use a temp register when adding new elements to unboxed arrays.
+ LDefinition tempDef = LDefinition::BogusTemp();
+ if (ins->unboxedType() != JSVAL_TYPE_MAGIC)
+ tempDef = temp();
+
LInstruction* lir;
switch (ins->value()->type()) {
case MIRType::Value:
- lir = new(alloc()) LFallibleStoreElementV(object, elements, index, useBox(ins->value()));
+ lir = new(alloc()) LFallibleStoreElementV(object, elements, index, useBox(ins->value()),
+ tempDef);
break;
default:
const LAllocation value = useRegisterOrNonDoubleConstant(ins->value());
- lir = new(alloc()) LFallibleStoreElementT(object, elements, index, value);
+ lir = new(alloc()) LFallibleStoreElementT(object, elements, index, value, tempDef);
break;
}
diff --git a/js/src/jit/Lowering.h b/js/src/jit/Lowering.h
index 81e6abbbb..bb06baa29 100644
--- a/js/src/jit/Lowering.h
+++ b/js/src/jit/Lowering.h
@@ -217,6 +217,10 @@ class LIRGenerator : public LIRGeneratorSpecific
void visitTypedObjectDescr(MTypedObjectDescr* ins);
void visitInitializedLength(MInitializedLength* ins);
void visitSetInitializedLength(MSetInitializedLength* ins);
+ void visitUnboxedArrayLength(MUnboxedArrayLength* ins);
+ void visitUnboxedArrayInitializedLength(MUnboxedArrayInitializedLength* ins);
+ void visitIncrementUnboxedArrayInitializedLength(MIncrementUnboxedArrayInitializedLength* ins);
+ void visitSetUnboxedArrayInitializedLength(MSetUnboxedArrayInitializedLength* ins);
void visitNot(MNot* ins);
void visitBoundsCheck(MBoundsCheck* ins);
void visitBoundsCheckLower(MBoundsCheckLower* ins);
diff --git a/js/src/jit/MCallOptimize.cpp b/js/src/jit/MCallOptimize.cpp
index a1c336391..276b5eba5 100644
--- a/js/src/jit/MCallOptimize.cpp
+++ b/js/src/jit/MCallOptimize.cpp
@@ -471,6 +471,11 @@ IonBuilder::inlineArray(CallInfo& callInfo)
return InliningStatus_NotInlined;
}
+ if (templateObject->is<UnboxedArrayObject>()) {
+ if (templateObject->group()->unboxedLayout().nativeGroup())
+ return InliningStatus_NotInlined;
+ }
+
// Multiple arguments imply array initialization, not just construction.
if (callInfo.argc() >= 2) {
initLength = callInfo.argc();
@@ -518,7 +523,7 @@ IonBuilder::inlineArray(CallInfo& callInfo)
// Make sure initLength matches the template object's length. This is
// not guaranteed to be the case, for instance if we're inlining the
// MConstant may come from an outer script.
- if (initLength != templateObject->as<ArrayObject>().length())
+ if (initLength != GetAnyBoxedOrUnboxedArrayLength(templateObject))
return InliningStatus_NotInlined;
// Don't inline large allocations.
@@ -533,15 +538,16 @@ IonBuilder::inlineArray(CallInfo& callInfo)
MDefinition* array = current->peek(-1);
if (callInfo.argc() >= 2) {
+ JSValueType unboxedType = GetBoxedOrUnboxedType(templateObject);
for (uint32_t i = 0; i < initLength; i++) {
if (!alloc().ensureBallast())
return InliningStatus_Error;
MDefinition* value = callInfo.getArg(i);
- if (!initializeArrayElement(array, i, value, /* addResumePoint = */ false))
+ if (!initializeArrayElement(array, i, value, unboxedType, /* addResumePoint = */ false))
return InliningStatus_Error;
}
- MInstruction* setLength = setInitializedLength(array, initLength);
+ MInstruction* setLength = setInitializedLength(array, unboxedType, initLength);
if (!resumeAfter(setLength))
return InliningStatus_Error;
}
@@ -574,7 +580,7 @@ IonBuilder::inlineArrayIsArray(CallInfo& callInfo)
if (!clasp || clasp->isProxy())
return InliningStatus_NotInlined;
- isArray = (clasp == &ArrayObject::class_);
+ isArray = (clasp == &ArrayObject::class_ || clasp == &UnboxedArrayObject::class_);
}
pushConstant(BooleanValue(isArray));
@@ -610,7 +616,7 @@ IonBuilder::inlineArrayPopShift(CallInfo& callInfo, MArrayPopShift::Mode mode)
if (!thisTypes)
return InliningStatus_NotInlined;
const Class* clasp = thisTypes->getKnownClass(constraints());
- if (clasp != &ArrayObject::class_)
+ if (clasp != &ArrayObject::class_ && clasp != &UnboxedArrayObject::class_)
return InliningStatus_NotInlined;
if (thisTypes->hasObjectFlags(constraints(), unhandledFlags)) {
trackOptimizationOutcome(TrackedOutcome::ArrayBadFlags);
@@ -623,9 +629,17 @@ IonBuilder::inlineArrayPopShift(CallInfo& callInfo, MArrayPopShift::Mode mode)
return InliningStatus_NotInlined;
}
+ JSValueType unboxedType = JSVAL_TYPE_MAGIC;
+ if (clasp == &UnboxedArrayObject::class_) {
+ unboxedType = UnboxedArrayElementType(constraints(), obj, nullptr);
+ if (unboxedType == JSVAL_TYPE_MAGIC)
+ return InliningStatus_NotInlined;
+ }
+
callInfo.setImplicitlyUsedUnchecked();
- obj = addMaybeCopyElementsForWrite(obj, /* checkNative = */ false);
+ if (clasp == &ArrayObject::class_)
+ obj = addMaybeCopyElementsForWrite(obj, /* checkNative = */ false);
TemporaryTypeSet* returnTypes = getInlineReturnTypeSet();
bool needsHoleCheck = thisTypes->hasObjectFlags(constraints(), OBJECT_FLAG_NON_PACKED);
@@ -636,7 +650,8 @@ IonBuilder::inlineArrayPopShift(CallInfo& callInfo, MArrayPopShift::Mode mode)
if (barrier != BarrierKind::NoBarrier)
returnType = MIRType::Value;
- MArrayPopShift* ins = MArrayPopShift::New(alloc(), obj, mode, needsHoleCheck, maybeUndefined);
+ MArrayPopShift* ins = MArrayPopShift::New(alloc(), obj, mode,
+ unboxedType, needsHoleCheck, maybeUndefined);
current->add(ins);
current->push(ins);
ins->setResultType(returnType);
@@ -718,6 +733,13 @@ IonBuilder::inlineArrayPush(CallInfo& callInfo)
return InliningStatus_NotInlined;
}
+ JSValueType unboxedType = JSVAL_TYPE_MAGIC;
+ if (clasp == &UnboxedArrayObject::class_) {
+ unboxedType = UnboxedArrayElementType(constraints(), obj, nullptr);
+ if (unboxedType == JSVAL_TYPE_MAGIC)
+ return InliningStatus_NotInlined;
+ }
+
callInfo.setImplicitlyUsedUnchecked();
if (conversion == TemporaryTypeSet::AlwaysConvertToDoubles ||
@@ -728,12 +750,13 @@ IonBuilder::inlineArrayPush(CallInfo& callInfo)
value = valueDouble;
}
- obj = addMaybeCopyElementsForWrite(obj, /* checkNative = */ false);
+ if (unboxedType == JSVAL_TYPE_MAGIC)
+ obj = addMaybeCopyElementsForWrite(obj, /* checkNative = */ false);
if (NeedsPostBarrier(value))
current->add(MPostWriteBarrier::New(alloc(), obj, value));
- MArrayPush* ins = MArrayPush::New(alloc(), obj, value);
+ MArrayPush* ins = MArrayPush::New(alloc(), obj, value, unboxedType);
current->add(ins);
current->push(ins);
@@ -774,9 +797,16 @@ IonBuilder::inlineArraySlice(CallInfo& callInfo)
return InliningStatus_NotInlined;
const Class* clasp = thisTypes->getKnownClass(constraints());
- if (clasp != &ArrayObject::class_)
+ if (clasp != &ArrayObject::class_ && clasp != &UnboxedArrayObject::class_)
return InliningStatus_NotInlined;
+ JSValueType unboxedType = JSVAL_TYPE_MAGIC;
+ if (clasp == &UnboxedArrayObject::class_) {
+ unboxedType = UnboxedArrayElementType(constraints(), obj, nullptr);
+ if (unboxedType == JSVAL_TYPE_MAGIC)
+ return InliningStatus_NotInlined;
+ }
+
// Watch out for indexed properties on the object or its prototype.
if (ElementAccessHasExtraIndexedProperty(this, obj)) {
trackOptimizationOutcome(TrackedOutcome::ProtoIndexedProps);
@@ -797,8 +827,15 @@ IonBuilder::inlineArraySlice(CallInfo& callInfo)
if (!templateObj)
return InliningStatus_NotInlined;
- if (!templateObj->is<ArrayObject>())
- return InliningStatus_NotInlined;
+ if (unboxedType == JSVAL_TYPE_MAGIC) {
+ if (!templateObj->is<ArrayObject>())
+ return InliningStatus_NotInlined;
+ } else {
+ if (!templateObj->is<UnboxedArrayObject>())
+ return InliningStatus_NotInlined;
+ if (templateObj->as<UnboxedArrayObject>().elementType() != unboxedType)
+ return InliningStatus_NotInlined;
+ }
callInfo.setImplicitlyUsedUnchecked();
@@ -817,12 +854,16 @@ IonBuilder::inlineArraySlice(CallInfo& callInfo)
end = MArrayLength::New(alloc(), elements);
current->add(end->toInstruction());
+ } else {
+ end = MUnboxedArrayLength::New(alloc(), obj);
+ current->add(end->toInstruction());
}
MArraySlice* ins = MArraySlice::New(alloc(), constraints(),
obj, begin, end,
templateObj,
- templateObj->group()->initialHeap(constraints()));
+ templateObj->group()->initialHeap(constraints()),
+ unboxedType);
current->add(ins);
current->push(ins);
@@ -1341,7 +1382,7 @@ IonBuilder::inlineConstantStringSplitString(CallInfo& callInfo)
// Check if exist a template object in stub.
JSString* stringStr = nullptr;
JSString* stringSep = nullptr;
- ArrayObject* templateObject = nullptr;
+ JSObject* templateObject = nullptr;
if (!inspector->isOptimizableCallStringSplit(pc, &stringStr, &stringSep, &templateObject))
return InliningStatus_NotInlined;
@@ -1367,13 +1408,13 @@ IonBuilder::inlineConstantStringSplitString(CallInfo& callInfo)
if (!key.maybeTypes()->hasType(TypeSet::StringType()))
return InliningStatus_NotInlined;
- uint32_t initLength = templateObject->length();
- if (templateObject->getDenseInitializedLength() != initLength)
+ uint32_t initLength = GetAnyBoxedOrUnboxedArrayLength(templateObject);
+ if (GetAnyBoxedOrUnboxedInitializedLength(templateObject) != initLength)
return InliningStatus_NotInlined;
Vector<MConstant*, 0, SystemAllocPolicy> arrayValues;
for (uint32_t i = 0; i < initLength; i++) {
- Value str = templateObject->getDenseElement(i);
+ Value str = GetAnyBoxedOrUnboxedDenseElement(templateObject, i);
MOZ_ASSERT(str.toString()->isAtom());
MConstant* value = MConstant::New(alloc().fallible(), str, constraints());
if (!value)
@@ -1404,6 +1445,8 @@ IonBuilder::inlineConstantStringSplitString(CallInfo& callInfo)
return InliningStatus_Inlined;
}
+ JSValueType unboxedType = GetBoxedOrUnboxedType(templateObject);
+
// Store all values, no need to initialize the length after each as
// jsop_initelem_array is doing because we do not expect to bailout
// because the memory is supposed to be allocated by now.
@@ -1414,11 +1457,11 @@ IonBuilder::inlineConstantStringSplitString(CallInfo& callInfo)
MConstant* value = arrayValues[i];
current->add(value);
- if (!initializeArrayElement(array, i, value, /* addResumePoint = */ false))
+ if (!initializeArrayElement(array, i, value, unboxedType, /* addResumePoint = */ false))
return InliningStatus_Error;
}
- MInstruction* setLength = setInitializedLength(array, initLength);
+ MInstruction* setLength = setInitializedLength(array, unboxedType, initLength);
if (!resumeAfter(setLength))
return InliningStatus_Error;
diff --git a/js/src/jit/MIR.cpp b/js/src/jit/MIR.cpp
index 1e4ee170f..403e70c02 100644
--- a/js/src/jit/MIR.cpp
+++ b/js/src/jit/MIR.cpp
@@ -5789,6 +5789,46 @@ jit::ElementAccessIsDenseNative(CompilerConstraintList* constraints,
return clasp && clasp->isNative() && !IsTypedArrayClass(clasp);
}
+JSValueType
+jit::UnboxedArrayElementType(CompilerConstraintList* constraints, MDefinition* obj,
+ MDefinition* id)
+{
+ if (obj->mightBeType(MIRType::String))
+ return JSVAL_TYPE_MAGIC;
+
+ if (id && id->type() != MIRType::Int32 && id->type() != MIRType::Double)
+ return JSVAL_TYPE_MAGIC;
+
+ TemporaryTypeSet* types = obj->resultTypeSet();
+ if (!types || types->unknownObject())
+ return JSVAL_TYPE_MAGIC;
+
+ JSValueType elementType = JSVAL_TYPE_MAGIC;
+ for (unsigned i = 0; i < types->getObjectCount(); i++) {
+ TypeSet::ObjectKey* key = types->getObject(i);
+ if (!key)
+ continue;
+
+ if (key->unknownProperties() || !key->isGroup())
+ return JSVAL_TYPE_MAGIC;
+
+ if (key->clasp() != &UnboxedArrayObject::class_)
+ return JSVAL_TYPE_MAGIC;
+
+ const UnboxedLayout &layout = key->group()->unboxedLayout();
+
+ if (layout.nativeGroup())
+ return JSVAL_TYPE_MAGIC;
+
+ if (elementType == layout.elementType() || elementType == JSVAL_TYPE_MAGIC)
+ elementType = layout.elementType();
+ else
+ return JSVAL_TYPE_MAGIC;
+ }
+
+ return elementType;
+}
+
bool
jit::ElementAccessIsTypedArray(CompilerConstraintList* constraints,
MDefinition* obj, MDefinition* id,
@@ -5948,6 +5988,11 @@ ObjectSubsumes(TypeSet::ObjectKey* first, TypeSet::ObjectKey* second)
firstElements.maybeTypes()->equals(secondElements.maybeTypes());
}
+ if (first->clasp() == &UnboxedArrayObject::class_) {
+ return first->group()->unboxedLayout().elementType() ==
+ second->group()->unboxedLayout().elementType();
+ }
+
return false;
}
diff --git a/js/src/jit/MIR.h b/js/src/jit/MIR.h
index cafdbab71..ebc98a4f8 100644
--- a/js/src/jit/MIR.h
+++ b/js/src/jit/MIR.h
@@ -375,7 +375,8 @@ class AliasSet {
Element = 1 << 1, // A Value member of obj->elements or
// a typed object.
UnboxedElement = 1 << 2, // An unboxed scalar or reference member of
- // typed object or unboxed object.
+ // a typed array, typed object, or unboxed
+ // object.
DynamicSlot = 1 << 3, // A Value member of obj->slots.
FixedSlot = 1 << 4, // A Value member of obj->fixedSlots().
DOMProperty = 1 << 5, // A DOM property
@@ -432,6 +433,9 @@ class AliasSet {
MOZ_ASSERT(flags && !(flags & Store_));
return AliasSet(flags | Store_);
}
+ static uint32_t BoxedOrUnboxedElements(JSValueType type) {
+ return (type == JSVAL_TYPE_MAGIC) ? Element : UnboxedElement;
+ }
};
typedef Vector<MDefinition*, 6, JitAllocPolicy> MDefinitionVector;
@@ -8758,6 +8762,102 @@ class MSetInitializedLength
ALLOW_CLONE(MSetInitializedLength)
};
+// Load the length from an unboxed array.
+class MUnboxedArrayLength
+ : public MUnaryInstruction,
+ public SingleObjectPolicy::Data
+{
+ explicit MUnboxedArrayLength(MDefinition* object)
+ : MUnaryInstruction(object)
+ {
+ setResultType(MIRType::Int32);
+ setMovable();
+ }
+
+ public:
+ INSTRUCTION_HEADER(UnboxedArrayLength)
+ TRIVIAL_NEW_WRAPPERS
+ NAMED_OPERANDS((0, object))
+
+ bool congruentTo(const MDefinition* ins) const override {
+ return congruentIfOperandsEqual(ins);
+ }
+ AliasSet getAliasSet() const override {
+ return AliasSet::Load(AliasSet::ObjectFields);
+ }
+
+ ALLOW_CLONE(MUnboxedArrayLength)
+};
+
+// Load the initialized length from an unboxed array.
+class MUnboxedArrayInitializedLength
+ : public MUnaryInstruction,
+ public SingleObjectPolicy::Data
+{
+ explicit MUnboxedArrayInitializedLength(MDefinition* object)
+ : MUnaryInstruction(object)
+ {
+ setResultType(MIRType::Int32);
+ setMovable();
+ }
+
+ public:
+ INSTRUCTION_HEADER(UnboxedArrayInitializedLength)
+ TRIVIAL_NEW_WRAPPERS
+ NAMED_OPERANDS((0, object))
+
+ bool congruentTo(const MDefinition* ins) const override {
+ return congruentIfOperandsEqual(ins);
+ }
+ AliasSet getAliasSet() const override {
+ return AliasSet::Load(AliasSet::ObjectFields);
+ }
+
+ ALLOW_CLONE(MUnboxedArrayInitializedLength)
+};
+
+// Increment the initialized length of an unboxed array object.
+class MIncrementUnboxedArrayInitializedLength
+ : public MUnaryInstruction,
+ public SingleObjectPolicy::Data
+{
+ explicit MIncrementUnboxedArrayInitializedLength(MDefinition* obj)
+ : MUnaryInstruction(obj)
+ {}
+
+ public:
+ INSTRUCTION_HEADER(IncrementUnboxedArrayInitializedLength)
+ TRIVIAL_NEW_WRAPPERS
+ NAMED_OPERANDS((0, object))
+
+ AliasSet getAliasSet() const override {
+ return AliasSet::Store(AliasSet::ObjectFields);
+ }
+
+ ALLOW_CLONE(MIncrementUnboxedArrayInitializedLength)
+};
+
+// Set the initialized length of an unboxed array object.
+class MSetUnboxedArrayInitializedLength
+ : public MBinaryInstruction,
+ public SingleObjectPolicy::Data
+{
+ explicit MSetUnboxedArrayInitializedLength(MDefinition* obj, MDefinition* length)
+ : MBinaryInstruction(obj, length)
+ {}
+
+ public:
+ INSTRUCTION_HEADER(SetUnboxedArrayInitializedLength)
+ TRIVIAL_NEW_WRAPPERS
+ NAMED_OPERANDS((0, object), (1, length))
+
+ AliasSet getAliasSet() const override {
+ return AliasSet::Store(AliasSet::ObjectFields);
+ }
+
+ ALLOW_CLONE(MSetUnboxedArrayInitializedLength)
+};
+
// Load the array length from an elements header.
class MArrayLength
: public MUnaryInstruction,
@@ -9251,19 +9351,23 @@ class MLoadElement
ALLOW_CLONE(MLoadElement)
};
-// Load a value from the elements vector of a native object.
+// Load a value from the elements vector for a dense native or unboxed array.
// If the index is out-of-bounds, or the indexed slot has a hole, undefined is
// returned instead.
class MLoadElementHole
: public MTernaryInstruction,
public SingleObjectPolicy::Data
{
+ // Unboxed element type, JSVAL_TYPE_MAGIC for dense native elements.
+ JSValueType unboxedType_;
+
bool needsNegativeIntCheck_;
bool needsHoleCheck_;
MLoadElementHole(MDefinition* elements, MDefinition* index, MDefinition* initLength,
- bool needsHoleCheck)
+ JSValueType unboxedType, bool needsHoleCheck)
: MTernaryInstruction(elements, index, initLength),
+ unboxedType_(unboxedType),
needsNegativeIntCheck_(true),
needsHoleCheck_(needsHoleCheck)
{
@@ -9285,6 +9389,9 @@ class MLoadElementHole
TRIVIAL_NEW_WRAPPERS
NAMED_OPERANDS((0, elements), (1, index), (2, initLength))
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
bool needsNegativeIntCheck() const {
return needsNegativeIntCheck_;
}
@@ -9295,6 +9402,8 @@ class MLoadElementHole
if (!ins->isLoadElementHole())
return false;
const MLoadElementHole* other = ins->toLoadElementHole();
+ if (unboxedType() != other->unboxedType())
+ return false;
if (needsHoleCheck() != other->needsHoleCheck())
return false;
if (needsNegativeIntCheck() != other->needsNegativeIntCheck())
@@ -9302,7 +9411,7 @@ class MLoadElementHole
return congruentIfOperandsEqual(other);
}
AliasSet getAliasSet() const override {
- return AliasSet::Load(AliasSet::Element);
+ return AliasSet::Load(AliasSet::BoxedOrUnboxedElements(unboxedType()));
}
void collectRangeInfoPreTrunc() override;
@@ -9482,17 +9591,20 @@ class MStoreElement
ALLOW_CLONE(MStoreElement)
};
-// Like MStoreElement, but supports indexes >= initialized length. The downside
-// is that we cannot hoist the elements vector and bounds check, since this
-// instruction may update the (initialized) length and reallocate the elements
-// vector.
+// Like MStoreElement, but supports indexes >= initialized length, and can
+// handle unboxed arrays. The downside is that we cannot hoist the elements
+// vector and bounds check, since this instruction may update the (initialized)
+// length and reallocate the elements vector.
class MStoreElementHole
: public MAryInstruction<4>,
public MStoreElementCommon,
public MixPolicy<SingleObjectPolicy, NoFloatPolicy<3> >::Data
{
+ JSValueType unboxedType_;
+
MStoreElementHole(MDefinition* object, MDefinition* elements,
- MDefinition* index, MDefinition* value)
+ MDefinition* index, MDefinition* value, JSValueType unboxedType)
+ : unboxedType_(unboxedType)
{
initOperand(0, object);
initOperand(1, elements);
@@ -9507,6 +9619,10 @@ class MStoreElementHole
TRIVIAL_NEW_WRAPPERS
NAMED_OPERANDS((0, object), (1, elements), (2, index), (3, value))
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
+
ALLOW_CLONE(MStoreElementHole)
};
@@ -9517,11 +9633,13 @@ class MFallibleStoreElement
public MStoreElementCommon,
public MixPolicy<SingleObjectPolicy, NoFloatPolicy<3> >::Data
{
+ JSValueType unboxedType_;
bool strict_;
MFallibleStoreElement(MDefinition* object, MDefinition* elements,
MDefinition* index, MDefinition* value,
- bool strict)
+ JSValueType unboxedType, bool strict)
+ : unboxedType_(unboxedType)
{
initOperand(0, object);
initOperand(1, elements);
@@ -9537,6 +9655,10 @@ class MFallibleStoreElement
TRIVIAL_NEW_WRAPPERS
NAMED_OPERANDS((0, object), (1, elements), (2, index), (3, value))
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
+
bool strict() const {
return strict_;
}
@@ -9640,12 +9762,13 @@ class MArrayPopShift
private:
Mode mode_;
+ JSValueType unboxedType_;
bool needsHoleCheck_;
bool maybeUndefined_;
- MArrayPopShift(MDefinition* object, Mode mode,
+ MArrayPopShift(MDefinition* object, Mode mode, JSValueType unboxedType,
bool needsHoleCheck, bool maybeUndefined)
- : MUnaryInstruction(object), mode_(mode),
+ : MUnaryInstruction(object), mode_(mode), unboxedType_(unboxedType),
needsHoleCheck_(needsHoleCheck), maybeUndefined_(maybeUndefined)
{ }
@@ -9663,8 +9786,12 @@ class MArrayPopShift
bool mode() const {
return mode_;
}
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
AliasSet getAliasSet() const override {
- return AliasSet::Store(AliasSet::ObjectFields | AliasSet::Element);
+ return AliasSet::Store(AliasSet::ObjectFields |
+ AliasSet::BoxedOrUnboxedElements(unboxedType()));
}
ALLOW_CLONE(MArrayPopShift)
@@ -9675,8 +9802,10 @@ class MArrayPush
: public MBinaryInstruction,
public MixPolicy<SingleObjectPolicy, NoFloatPolicy<1> >::Data
{
- MArrayPush(MDefinition* object, MDefinition* value)
- : MBinaryInstruction(object, value)
+ JSValueType unboxedType_;
+
+ MArrayPush(MDefinition* object, MDefinition* value, JSValueType unboxedType)
+ : MBinaryInstruction(object, value), unboxedType_(unboxedType)
{
setResultType(MIRType::Int32);
}
@@ -9686,8 +9815,12 @@ class MArrayPush
TRIVIAL_NEW_WRAPPERS
NAMED_OPERANDS((0, object), (1, value))
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
AliasSet getAliasSet() const override {
- return AliasSet::Store(AliasSet::ObjectFields | AliasSet::Element);
+ return AliasSet::Store(AliasSet::ObjectFields |
+ AliasSet::BoxedOrUnboxedElements(unboxedType()));
}
void computeRange(TempAllocator& alloc) override;
@@ -9701,13 +9834,15 @@ class MArraySlice
{
CompilerObject templateObj_;
gc::InitialHeap initialHeap_;
+ JSValueType unboxedType_;
MArraySlice(CompilerConstraintList* constraints, MDefinition* obj,
MDefinition* begin, MDefinition* end,
- JSObject* templateObj, gc::InitialHeap initialHeap)
+ JSObject* templateObj, gc::InitialHeap initialHeap, JSValueType unboxedType)
: MTernaryInstruction(obj, begin, end),
templateObj_(templateObj),
- initialHeap_(initialHeap)
+ initialHeap_(initialHeap),
+ unboxedType_(unboxedType)
{
setResultType(MIRType::Object);
}
@@ -9725,6 +9860,10 @@ class MArraySlice
return initialHeap_;
}
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
+
bool possiblyCalls() const override {
return true;
}
@@ -12093,13 +12232,15 @@ class MInArray
{
bool needsHoleCheck_;
bool needsNegativeIntCheck_;
+ JSValueType unboxedType_;
MInArray(MDefinition* elements, MDefinition* index,
MDefinition* initLength, MDefinition* object,
- bool needsHoleCheck)
+ bool needsHoleCheck, JSValueType unboxedType)
: MQuaternaryInstruction(elements, index, initLength, object),
needsHoleCheck_(needsHoleCheck),
- needsNegativeIntCheck_(true)
+ needsNegativeIntCheck_(true),
+ unboxedType_(unboxedType)
{
setResultType(MIRType::Boolean);
setMovable();
@@ -12119,6 +12260,9 @@ class MInArray
bool needsNegativeIntCheck() const {
return needsNegativeIntCheck_;
}
+ JSValueType unboxedType() const {
+ return unboxedType_;
+ }
void collectRangeInfoPreTrunc() override;
AliasSet getAliasSet() const override {
return AliasSet::Load(AliasSet::Element);
@@ -12131,6 +12275,8 @@ class MInArray
return false;
if (needsNegativeIntCheck() != other->needsNegativeIntCheck())
return false;
+ if (unboxedType() != other->unboxedType())
+ return false;
return congruentIfOperandsEqual(other);
}
};
@@ -14031,6 +14177,8 @@ MDefinition::maybeConstantValue()
bool ElementAccessIsDenseNative(CompilerConstraintList* constraints,
MDefinition* obj, MDefinition* id);
+JSValueType UnboxedArrayElementType(CompilerConstraintList* constraints, MDefinition* obj,
+ MDefinition* id);
bool ElementAccessIsTypedArray(CompilerConstraintList* constraints,
MDefinition* obj, MDefinition* id,
Scalar::Type* arrayType);
diff --git a/js/src/jit/MOpcodes.h b/js/src/jit/MOpcodes.h
index 589dde077..f5f59dee6 100644
--- a/js/src/jit/MOpcodes.h
+++ b/js/src/jit/MOpcodes.h
@@ -199,6 +199,10 @@ namespace jit {
_(SetTypedObjectOffset) \
_(InitializedLength) \
_(SetInitializedLength) \
+ _(UnboxedArrayLength) \
+ _(UnboxedArrayInitializedLength) \
+ _(IncrementUnboxedArrayInitializedLength) \
+ _(SetUnboxedArrayInitializedLength) \
_(Not) \
_(BoundsCheck) \
_(BoundsCheckLower) \
diff --git a/js/src/jit/MacroAssembler.cpp b/js/src/jit/MacroAssembler.cpp
index e50f68722..f633b9b7b 100644
--- a/js/src/jit/MacroAssembler.cpp
+++ b/js/src/jit/MacroAssembler.cpp
@@ -705,6 +705,31 @@ template void
MacroAssembler::storeUnboxedProperty(BaseIndex address, JSValueType type,
const ConstantOrRegister& value, Label* failure);
+void
+MacroAssembler::checkUnboxedArrayCapacity(Register obj, const RegisterOrInt32Constant& index,
+ Register temp, Label* failure)
+{
+ Address initLengthAddr(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength());
+ Address lengthAddr(obj, UnboxedArrayObject::offsetOfLength());
+
+ Label capacityIsIndex, done;
+ load32(initLengthAddr, temp);
+ branchTest32(Assembler::NonZero, temp, Imm32(UnboxedArrayObject::CapacityMask), &capacityIsIndex);
+ branch32(Assembler::BelowOrEqual, lengthAddr, index, failure);
+ jump(&done);
+ bind(&capacityIsIndex);
+
+ // Do a partial shift so that we can get an absolute offset from the base
+ // of CapacityArray to use.
+ JS_STATIC_ASSERT(sizeof(UnboxedArrayObject::CapacityArray[0]) == 4);
+ rshiftPtr(Imm32(UnboxedArrayObject::CapacityShift - 2), temp);
+ and32(Imm32(~0x3), temp);
+
+ addPtr(ImmPtr(&UnboxedArrayObject::CapacityArray), temp);
+ branch32(Assembler::BelowOrEqual, Address(temp, 0), index, failure);
+ bind(&done);
+}
+
// Inlined version of gc::CheckAllocatorState that checks the bare essentials
// and bails for anything that cannot be handled with our jit allocators.
void
@@ -1256,6 +1281,16 @@ MacroAssembler::initGCThing(Register obj, Register temp, JSObject* templateObj,
storePtr(ImmWord(0), Address(obj, UnboxedPlainObject::offsetOfExpando()));
if (initContents)
initUnboxedObjectContents(obj, &templateObj->as<UnboxedPlainObject>());
+ } else if (templateObj->is<UnboxedArrayObject>()) {
+ MOZ_ASSERT(templateObj->as<UnboxedArrayObject>().hasInlineElements());
+ int elementsOffset = UnboxedArrayObject::offsetOfInlineElements();
+ computeEffectiveAddress(Address(obj, elementsOffset), temp);
+ storePtr(temp, Address(obj, UnboxedArrayObject::offsetOfElements()));
+ store32(Imm32(templateObj->as<UnboxedArrayObject>().length()),
+ Address(obj, UnboxedArrayObject::offsetOfLength()));
+ uint32_t capacityIndex = templateObj->as<UnboxedArrayObject>().capacityIndex();
+ store32(Imm32(capacityIndex << UnboxedArrayObject::CapacityShift),
+ Address(obj, UnboxedArrayObject::offsetOfCapacityIndexAndInitializedLength()));
} else {
MOZ_CRASH("Unknown object");
}
diff --git a/js/src/jit/MacroAssembler.h b/js/src/jit/MacroAssembler.h
index 6ee989463..b6616321c 100644
--- a/js/src/jit/MacroAssembler.h
+++ b/js/src/jit/MacroAssembler.h
@@ -1626,7 +1626,7 @@ class MacroAssembler : public MacroAssemblerSpecific
void storeToTypedFloatArray(Scalar::Type arrayType, FloatRegister value, const Address& dest,
unsigned numElems = 0);
- // Load a property from an UnboxedPlainObject.
+ // Load a property from an UnboxedPlainObject or UnboxedArrayObject.
template <typename T>
void loadUnboxedProperty(T address, JSValueType type, TypedOrValueRegister output);
@@ -1637,6 +1637,9 @@ class MacroAssembler : public MacroAssemblerSpecific
void storeUnboxedProperty(T address, JSValueType type,
const ConstantOrRegister& value, Label* failure);
+ void checkUnboxedArrayCapacity(Register obj, const RegisterOrInt32Constant& index,
+ Register temp, Label* failure);
+
Register extractString(const Address& address, Register scratch) {
return extractObject(address, scratch);
}
diff --git a/js/src/jit/Recover.cpp b/js/src/jit/Recover.cpp
index 8fe6ee3fb..6fd71f377 100644
--- a/js/src/jit/Recover.cpp
+++ b/js/src/jit/Recover.cpp
@@ -1355,7 +1355,7 @@ RNewArray::recover(JSContext* cx, SnapshotIterator& iter) const
RootedValue result(cx);
RootedObjectGroup group(cx, templateObject->group());
- ArrayObject* resultObject = NewFullyAllocatedArrayTryUseGroup(cx, group, count_);
+ JSObject* resultObject = NewFullyAllocatedArrayTryUseGroup(cx, group, count_);
if (!resultObject)
return false;
diff --git a/js/src/jit/ScalarReplacement.cpp b/js/src/jit/ScalarReplacement.cpp
index be9ceee2e..2065c0371 100644
--- a/js/src/jit/ScalarReplacement.cpp
+++ b/js/src/jit/ScalarReplacement.cpp
@@ -795,6 +795,11 @@ IsArrayEscaped(MInstruction* ins)
return true;
}
+ if (obj->is<UnboxedArrayObject>()) {
+ JitSpew(JitSpew_Escape, "Template object is an unboxed plain object.");
+ return true;
+ }
+
if (length >= 16) {
JitSpew(JitSpew_Escape, "Array has too many elements");
return true;
diff --git a/js/src/jit/SharedIC.cpp b/js/src/jit/SharedIC.cpp
index 313957462..2475dfb22 100644
--- a/js/src/jit/SharedIC.cpp
+++ b/js/src/jit/SharedIC.cpp
@@ -286,6 +286,11 @@ ICStub::trace(JSTracer* trc)
TraceEdge(trc, &getElemStub->shape(), "baseline-getelem-dense-shape");
break;
}
+ case ICStub::GetElem_UnboxedArray: {
+ ICGetElem_UnboxedArray* getElemStub = toGetElem_UnboxedArray();
+ TraceEdge(trc, &getElemStub->group(), "baseline-getelem-unboxed-array-group");
+ break;
+ }
case ICStub::GetElem_TypedArray: {
ICGetElem_TypedArray* getElemStub = toGetElem_TypedArray();
TraceEdge(trc, &getElemStub->shape(), "baseline-getelem-typedarray-shape");
@@ -2245,6 +2250,7 @@ IsCacheableProtoChain(JSObject* obj, JSObject* holder, bool isDOMProxy)
if (obj == holder)
return false;
if (!obj->is<UnboxedPlainObject>() &&
+ !obj->is<UnboxedArrayObject>() &&
!obj->is<TypedObject>())
{
return false;
@@ -2576,6 +2582,9 @@ CheckHasNoSuchProperty(JSContext* cx, JSObject* obj, PropertyName* name,
} else if (curObj->is<UnboxedPlainObject>()) {
if (curObj->as<UnboxedPlainObject>().containsUnboxedOrExpandoProperty(cx, NameToId(name)))
return false;
+ } else if (curObj->is<UnboxedArrayObject>()) {
+ if (name == cx->names().length)
+ return false;
} else if (curObj->is<TypedObject>()) {
if (curObj->as<TypedObject>().typeDescr().hasProperty(cx->names(), NameToId(name)))
return false;
diff --git a/js/src/jit/VMFunctions.cpp b/js/src/jit/VMFunctions.cpp
index 1cb731de8..10be2836b 100644
--- a/js/src/jit/VMFunctions.cpp
+++ b/js/src/jit/VMFunctions.cpp
@@ -306,7 +306,7 @@ template bool StringsEqual<false>(JSContext* cx, HandleString lhs, HandleString
bool
ArrayPopDense(JSContext* cx, HandleObject obj, MutableHandleValue rval)
{
- MOZ_ASSERT(obj->is<ArrayObject>());
+ MOZ_ASSERT(obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>());
AutoDetectInvalidation adi(cx, rval);
@@ -325,11 +325,12 @@ ArrayPopDense(JSContext* cx, HandleObject obj, MutableHandleValue rval)
}
bool
-ArrayPushDense(JSContext* cx, HandleArrayObject arr, HandleValue v, uint32_t* length)
+ArrayPushDense(JSContext* cx, HandleObject obj, HandleValue v, uint32_t* length)
{
- *length = arr->length();
- DenseElementResult result = arr->setOrExtendDenseElements(cx, *length, v.address(), 1,
- ShouldUpdateTypes::DontUpdate);
+ *length = GetAnyBoxedOrUnboxedArrayLength(obj);
+ DenseElementResult result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, *length, v.address(), 1,
+ ShouldUpdateTypes::DontUpdate);
if (result != DenseElementResult::Incomplete) {
(*length)++;
return result == DenseElementResult::Success;
@@ -337,7 +338,7 @@ ArrayPushDense(JSContext* cx, HandleArrayObject arr, HandleValue v, uint32_t* le
JS::AutoValueArray<3> argv(cx);
argv[0].setUndefined();
- argv[1].setObject(*arr);
+ argv[1].setObject(*obj);
argv[2].set(v);
if (!js::array_push(cx, 1, argv.begin()))
return false;
@@ -349,7 +350,7 @@ ArrayPushDense(JSContext* cx, HandleArrayObject arr, HandleValue v, uint32_t* le
bool
ArrayShiftDense(JSContext* cx, HandleObject obj, MutableHandleValue rval)
{
- MOZ_ASSERT(obj->is<ArrayObject>());
+ MOZ_ASSERT(obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>());
AutoDetectInvalidation adi(cx, rval);
@@ -1130,14 +1131,16 @@ Recompile(JSContext* cx)
}
bool
-SetDenseElement(JSContext* cx, HandleNativeObject obj, int32_t index, HandleValue value, bool strict)
+SetDenseOrUnboxedArrayElement(JSContext* cx, HandleObject obj, int32_t index,
+ HandleValue value, bool strict)
{
// This function is called from Ion code for StoreElementHole's OOL path.
- // In this case we know the object is native and that no type changes are
- // needed.
+ // In this case we know the object is native or an unboxed array and that
+ // no type changes are needed.
- DenseElementResult result = obj->setOrExtendDenseElements(cx, index, value.address(), 1,
- ShouldUpdateTypes::DontUpdate);
+ DenseElementResult result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, index, value.address(), 1,
+ ShouldUpdateTypes::DontUpdate);
if (result != DenseElementResult::Incomplete)
return result == DenseElementResult::Success;
diff --git a/js/src/jit/VMFunctions.h b/js/src/jit/VMFunctions.h
index 94f741397..7f225c293 100644
--- a/js/src/jit/VMFunctions.h
+++ b/js/src/jit/VMFunctions.h
@@ -622,7 +622,7 @@ template<bool Equal>
bool StringsEqual(JSContext* cx, HandleString left, HandleString right, bool* res);
MOZ_MUST_USE bool ArrayPopDense(JSContext* cx, HandleObject obj, MutableHandleValue rval);
-MOZ_MUST_USE bool ArrayPushDense(JSContext* cx, HandleArrayObject obj, HandleValue v, uint32_t* length);
+MOZ_MUST_USE bool ArrayPushDense(JSContext* cx, HandleObject obj, HandleValue v, uint32_t* length);
MOZ_MUST_USE bool ArrayShiftDense(JSContext* cx, HandleObject obj, MutableHandleValue rval);
JSString* ArrayJoin(JSContext* cx, HandleObject array, HandleString sep);
@@ -745,8 +745,8 @@ ForcedRecompile(JSContext* cx);
JSString* StringReplace(JSContext* cx, HandleString string, HandleString pattern,
HandleString repl);
-MOZ_MUST_USE bool SetDenseElement(JSContext* cx, HandleNativeObject obj, int32_t index,
- HandleValue value, bool strict);
+MOZ_MUST_USE bool SetDenseOrUnboxedArrayElement(JSContext* cx, HandleObject obj, int32_t index,
+ HandleValue value, bool strict);
void AssertValidObjectPtr(JSContext* cx, JSObject* obj);
void AssertValidObjectOrNullPtr(JSContext* cx, JSObject* obj);
diff --git a/js/src/jit/shared/LIR-shared.h b/js/src/jit/shared/LIR-shared.h
index ff4915d1a..49879eedb 100644
--- a/js/src/jit/shared/LIR-shared.h
+++ b/js/src/jit/shared/LIR-shared.h
@@ -5166,6 +5166,72 @@ class LSetInitializedLength : public LInstructionHelper<0, 2, 0>
}
};
+class LUnboxedArrayLength : public LInstructionHelper<1, 1, 0>
+{
+ public:
+ LIR_HEADER(UnboxedArrayLength)
+
+ explicit LUnboxedArrayLength(const LAllocation& object) {
+ setOperand(0, object);
+ }
+
+ const LAllocation* object() {
+ return getOperand(0);
+ }
+};
+
+class LUnboxedArrayInitializedLength : public LInstructionHelper<1, 1, 0>
+{
+ public:
+ LIR_HEADER(UnboxedArrayInitializedLength)
+
+ explicit LUnboxedArrayInitializedLength(const LAllocation& object) {
+ setOperand(0, object);
+ }
+
+ const LAllocation* object() {
+ return getOperand(0);
+ }
+};
+
+class LIncrementUnboxedArrayInitializedLength : public LInstructionHelper<0, 1, 0>
+{
+ public:
+ LIR_HEADER(IncrementUnboxedArrayInitializedLength)
+
+ explicit LIncrementUnboxedArrayInitializedLength(const LAllocation& object) {
+ setOperand(0, object);
+ }
+
+ const LAllocation* object() {
+ return getOperand(0);
+ }
+};
+
+class LSetUnboxedArrayInitializedLength : public LInstructionHelper<0, 2, 1>
+{
+ public:
+ LIR_HEADER(SetUnboxedArrayInitializedLength)
+
+ explicit LSetUnboxedArrayInitializedLength(const LAllocation& object,
+ const LAllocation& length,
+ const LDefinition& temp) {
+ setOperand(0, object);
+ setOperand(1, length);
+ setTemp(0, temp);
+ }
+
+ const LAllocation* object() {
+ return getOperand(0);
+ }
+ const LAllocation* length() {
+ return getOperand(1);
+ }
+ const LDefinition* temp() {
+ return getTemp(0);
+ }
+};
+
// Load the length from an elements header.
class LArrayLength : public LInstructionHelper<1, 1, 0>
{
@@ -5670,17 +5736,19 @@ class LStoreElementT : public LInstructionHelper<0, 3, 0>
};
// Like LStoreElementV, but supports indexes >= initialized length.
-class LStoreElementHoleV : public LInstructionHelper<0, 3 + BOX_PIECES, 0>
+class LStoreElementHoleV : public LInstructionHelper<0, 3 + BOX_PIECES, 1>
{
public:
LIR_HEADER(StoreElementHoleV)
LStoreElementHoleV(const LAllocation& object, const LAllocation& elements,
- const LAllocation& index, const LBoxAllocation& value) {
+ const LAllocation& index, const LBoxAllocation& value,
+ const LDefinition& temp) {
setOperand(0, object);
setOperand(1, elements);
setOperand(2, index);
setBoxOperand(Value, value);
+ setTemp(0, temp);
}
static const size_t Value = 3;
@@ -5700,17 +5768,19 @@ class LStoreElementHoleV : public LInstructionHelper<0, 3 + BOX_PIECES, 0>
};
// Like LStoreElementT, but supports indexes >= initialized length.
-class LStoreElementHoleT : public LInstructionHelper<0, 4, 0>
+class LStoreElementHoleT : public LInstructionHelper<0, 4, 1>
{
public:
LIR_HEADER(StoreElementHoleT)
LStoreElementHoleT(const LAllocation& object, const LAllocation& elements,
- const LAllocation& index, const LAllocation& value) {
+ const LAllocation& index, const LAllocation& value,
+ const LDefinition& temp) {
setOperand(0, object);
setOperand(1, elements);
setOperand(2, index);
setOperand(3, value);
+ setTemp(0, temp);
}
const MStoreElementHole* mir() const {
@@ -5731,17 +5801,19 @@ class LStoreElementHoleT : public LInstructionHelper<0, 4, 0>
};
// Like LStoreElementV, but can just ignore assignment (for eg. frozen objects)
-class LFallibleStoreElementV : public LInstructionHelper<0, 3 + BOX_PIECES, 0>
+class LFallibleStoreElementV : public LInstructionHelper<0, 3 + BOX_PIECES, 1>
{
public:
LIR_HEADER(FallibleStoreElementV)
LFallibleStoreElementV(const LAllocation& object, const LAllocation& elements,
- const LAllocation& index, const LBoxAllocation& value) {
+ const LAllocation& index, const LBoxAllocation& value,
+ const LDefinition& temp) {
setOperand(0, object);
setOperand(1, elements);
setOperand(2, index);
setBoxOperand(Value, value);
+ setTemp(0, temp);
}
static const size_t Value = 3;
@@ -5761,17 +5833,19 @@ class LFallibleStoreElementV : public LInstructionHelper<0, 3 + BOX_PIECES, 0>
};
// Like LStoreElementT, but can just ignore assignment (for eg. frozen objects)
-class LFallibleStoreElementT : public LInstructionHelper<0, 4, 0>
+class LFallibleStoreElementT : public LInstructionHelper<0, 4, 1>
{
public:
LIR_HEADER(FallibleStoreElementT)
LFallibleStoreElementT(const LAllocation& object, const LAllocation& elements,
- const LAllocation& index, const LAllocation& value) {
+ const LAllocation& index, const LAllocation& value,
+ const LDefinition& temp) {
setOperand(0, object);
setOperand(1, elements);
setOperand(2, index);
setOperand(3, value);
+ setTemp(0, temp);
}
const MFallibleStoreElement* mir() const {
diff --git a/js/src/jit/shared/LOpcodes-shared.h b/js/src/jit/shared/LOpcodes-shared.h
index 56b98940a..505c0ea03 100644
--- a/js/src/jit/shared/LOpcodes-shared.h
+++ b/js/src/jit/shared/LOpcodes-shared.h
@@ -266,6 +266,10 @@
_(PostWriteElementBarrierV) \
_(InitializedLength) \
_(SetInitializedLength) \
+ _(UnboxedArrayLength) \
+ _(UnboxedArrayInitializedLength) \
+ _(IncrementUnboxedArrayInitializedLength) \
+ _(SetUnboxedArrayInitializedLength) \
_(BoundsCheck) \
_(BoundsCheckRange) \
_(BoundsCheckLower) \
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 7795c5e4c..0e2eeebaa 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -1096,6 +1096,7 @@ class JS_PUBLIC_API(ContextOptions) {
wasmAlwaysBaseline_(false),
throwOnAsmJSValidationFailure_(false),
nativeRegExp_(true),
+ unboxedArrays_(false),
asyncStack_(true),
throwOnDebuggeeWouldRun_(true),
dumpStackOnDebuggeeWouldRun_(false),
@@ -1172,6 +1173,12 @@ class JS_PUBLIC_API(ContextOptions) {
return *this;
}
+ bool unboxedArrays() const { return unboxedArrays_; }
+ ContextOptions& setUnboxedArrays(bool flag) {
+ unboxedArrays_ = flag;
+ return *this;
+ }
+
bool asyncStack() const { return asyncStack_; }
ContextOptions& setAsyncStack(bool flag) {
asyncStack_ = flag;
@@ -1234,6 +1241,7 @@ class JS_PUBLIC_API(ContextOptions) {
bool wasmAlwaysBaseline_ : 1;
bool throwOnAsmJSValidationFailure_ : 1;
bool nativeRegExp_ : 1;
+ bool unboxedArrays_ : 1;
bool asyncStack_ : 1;
bool throwOnDebuggeeWouldRun_ : 1;
bool dumpStackOnDebuggeeWouldRun_ : 1;
diff --git a/js/src/jsarray.cpp b/js/src/jsarray.cpp
index 4ee967d4c..1724a0a66 100644
--- a/js/src/jsarray.cpp
+++ b/js/src/jsarray.cpp
@@ -64,7 +64,7 @@ using JS::ToUint32;
bool
JS::IsArray(JSContext* cx, HandleObject obj, IsArrayAnswer* answer)
{
- if (obj->is<ArrayObject>()) {
+ if (obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>()) {
*answer = IsArrayAnswer::Array;
return true;
}
@@ -100,6 +100,11 @@ js::GetLengthProperty(JSContext* cx, HandleObject obj, uint32_t* lengthp)
return true;
}
+ if (obj->is<UnboxedArrayObject>()) {
+ *lengthp = obj->as<UnboxedArrayObject>().length();
+ return true;
+ }
+
if (obj->is<ArgumentsObject>()) {
ArgumentsObject& argsobj = obj->as<ArgumentsObject>();
if (!argsobj.hasOverriddenLength()) {
@@ -248,20 +253,18 @@ static bool
GetElement(JSContext* cx, HandleObject obj, HandleObject receiver,
uint32_t index, bool* hole, MutableHandleValue vp)
{
- if (obj->isNative()) {
- NativeObject* nobj = &obj->as<NativeObject>();
- if (index < nobj->getDenseInitializedLength()) {
- vp.set(nobj->getDenseElement(size_t(index)));
- if (!vp.isMagic(JS_ELEMENTS_HOLE)) {
- *hole = false;
- return true;
- }
+ AssertGreaterThanZero(index);
+ if (index < GetAnyBoxedOrUnboxedInitializedLength(obj)) {
+ vp.set(GetAnyBoxedOrUnboxedDenseElement(obj, uint32_t(index)));
+ if (!vp.isMagic(JS_ELEMENTS_HOLE)) {
+ *hole = false;
+ return true;
}
- if (nobj->is<ArgumentsObject>() && index <= UINT32_MAX) {
- if (nobj->as<ArgumentsObject>().maybeGetElement(uint32_t(index), vp)) {
- *hole = false;
- return true;
- }
+ }
+ if (obj->is<ArgumentsObject>()) {
+ if (obj->as<ArgumentsObject>().maybeGetElement(uint32_t(index), vp)) {
+ *hole = false;
+ return true;
}
}
@@ -280,8 +283,8 @@ ElementAdder::append(JSContext* cx, HandleValue v)
{
MOZ_ASSERT(index_ < length_);
if (resObj_) {
- NativeObject* resObj = &resObj_->as<NativeObject>();
- DenseElementResult result = resObj->setOrExtendDenseElements(cx, index_, v.address(), 1);
+ DenseElementResult result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, resObj_, index_, v.address(), 1);
if (result == DenseElementResult::Failure)
return false;
if (result == DenseElementResult::Incomplete) {
@@ -333,31 +336,37 @@ js::GetElementsWithAdder(JSContext* cx, HandleObject obj, HandleObject receiver,
return true;
}
-static bool
-GetDenseElements(NativeObject* aobj, uint32_t length, Value* vp)
+template <JSValueType Type>
+DenseElementResult
+GetBoxedOrUnboxedDenseElements(JSObject* aobj, uint32_t length, Value* vp)
{
MOZ_ASSERT(!ObjectMayHaveExtraIndexedProperties(aobj));
- if (length > aobj->getDenseInitializedLength())
- return false;
+ if (length > GetBoxedOrUnboxedInitializedLength<Type>(aobj))
+ return DenseElementResult::Incomplete;
for (size_t i = 0; i < length; i++) {
- vp[i] = aobj->getDenseElement(i);
+ vp[i] = GetBoxedOrUnboxedDenseElement<Type>(aobj, i);
// No other indexed properties so hole => undefined.
if (vp[i].isMagic(JS_ELEMENTS_HOLE))
vp[i] = UndefinedValue();
}
- return true;
+ return DenseElementResult::Success;
}
+DefineBoxedOrUnboxedFunctor3(GetBoxedOrUnboxedDenseElements,
+ JSObject*, uint32_t, Value*);
+
bool
js::GetElements(JSContext* cx, HandleObject aobj, uint32_t length, Value* vp)
{
if (!ObjectMayHaveExtraIndexedProperties(aobj)) {
- if (GetDenseElements(&aobj->as<NativeObject>(), length, vp))
- return true;
+ GetBoxedOrUnboxedDenseElementsFunctor functor(aobj, length, vp);
+ DenseElementResult result = CallBoxedOrUnboxedSpecialization(functor, aobj);
+ if (result != DenseElementResult::Incomplete)
+ return result == DenseElementResult::Success;
}
if (aobj->is<ArgumentsObject>()) {
@@ -389,9 +398,9 @@ SetArrayElement(JSContext* cx, HandleObject obj, double index, HandleValue v)
{
MOZ_ASSERT(index >= 0);
- if (obj->is<ArrayObject>() && !obj->isIndexed() && index <= UINT32_MAX) {
- NativeObject* nobj = &obj->as<NativeObject>();
- DenseElementResult result = nobj->setOrExtendDenseElements(cx, uint32_t(index), v.address(), 1);
+ if ((obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>()) && !obj->isIndexed() && index <= UINT32_MAX) {
+ DenseElementResult result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, uint32_t(index), v.address(), 1);
if (result != DenseElementResult::Incomplete)
return result == DenseElementResult::Success;
}
@@ -511,6 +520,24 @@ struct ReverseIndexComparator
}
};
+bool
+js::CanonicalizeArrayLengthValue(JSContext* cx, HandleValue v, uint32_t* newLen)
+{
+ double d;
+
+ if (!ToUint32(cx, v, newLen))
+ return false;
+
+ if (!ToNumber(cx, v, &d))
+ return false;
+
+ if (d == *newLen)
+ return true;
+
+ JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_BAD_ARRAY_LENGTH);
+ return false;
+}
+
/* ES6 draft rev 34 (2015 Feb 20) 9.4.2.4 ArraySetLength */
bool
js::ArraySetLength(JSContext* cx, Handle<ArrayObject*> arr, HandleId id,
@@ -532,22 +559,12 @@ js::ArraySetLength(JSContext* cx, Handle<ArrayObject*> arr, HandleId id,
} else {
// Step 2 is irrelevant in our implementation.
- // Step 3.
- if (!ToUint32(cx, value, &newLen))
- return false;
-
- // Step 4.
- double d;
- if (!ToNumber(cx, value, &d))
+ // Steps 3-7.
+ MOZ_ASSERT_IF(attrs & JSPROP_IGNORE_VALUE, value.isUndefined());
+ if (!CanonicalizeArrayLengthValue(cx, value, &newLen))
return false;
- // Step 5.
- if (d != newLen) {
- JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_BAD_ARRAY_LENGTH);
- return false;
- }
-
- // Steps 6-8 are irrelevant in our implementation.
+ // Step 8 is irrelevant in our implementation.
}
// Steps 9-11.
@@ -806,7 +823,7 @@ array_addProperty(JSContext* cx, HandleObject obj, HandleId id, HandleValue v)
static inline bool
ObjectMayHaveExtraIndexedOwnProperties(JSObject* obj)
{
- return !obj->isNative() ||
+ return (!obj->isNative() && !obj->is<UnboxedArrayObject>()) ||
obj->isIndexed() ||
obj->is<TypedArrayObject>() ||
ClassMayResolveId(*obj->runtimeFromAnyThread()->commonNames,
@@ -837,7 +854,7 @@ js::ObjectMayHaveExtraIndexedProperties(JSObject* obj)
if (ObjectMayHaveExtraIndexedOwnProperties(obj))
return true;
- if (obj->as<NativeObject>().getDenseInitializedLength() != 0)
+ if (GetAnyBoxedOrUnboxedInitializedLength(obj) != 0)
return true;
} while (true);
}
@@ -1047,32 +1064,32 @@ struct StringSeparatorOp
}
};
-template <typename SeparatorOp>
-static bool
-ArrayJoinDenseKernel(JSContext* cx, SeparatorOp sepOp, HandleNativeObject obj, uint32_t length,
+template <typename SeparatorOp, JSValueType Type>
+static DenseElementResult
+ArrayJoinDenseKernel(JSContext* cx, SeparatorOp sepOp, HandleObject obj, uint32_t length,
StringBuffer& sb, uint32_t* numProcessed)
{
// This loop handles all elements up to initializedLength. If
// length > initLength we rely on the second loop to add the
// other elements.
MOZ_ASSERT(*numProcessed == 0);
- uint32_t initLength = Min<uint32_t>(obj->getDenseInitializedLength(),
+ uint32_t initLength = Min<uint32_t>(GetBoxedOrUnboxedInitializedLength<Type>(obj),
length);
while (*numProcessed < initLength) {
if (!CheckForInterrupt(cx))
- return false;
+ return DenseElementResult::Failure;
Value elem = obj->as<NativeObject>().getDenseElement(*numProcessed);
if (elem.isString()) {
if (!sb.append(elem.toString()))
- return false;
+ return DenseElementResult::Failure;
} else if (elem.isNumber()) {
if (!NumberValueToStringBuffer(cx, elem, sb))
- return false;
+ return DenseElementResult::Failure;
} else if (elem.isBoolean()) {
if (!BooleanToStringBuffer(elem.toBoolean(), sb))
- return false;
+ return DenseElementResult::Failure;
} else if (elem.isObject() || elem.isSymbol()) {
/*
* Object stringifying could modify the initialized length or make
@@ -1088,13 +1105,33 @@ ArrayJoinDenseKernel(JSContext* cx, SeparatorOp sepOp, HandleNativeObject obj, u
}
if (++(*numProcessed) != length && !sepOp(cx, sb))
- return false;
+ return DenseElementResult::Failure;
}
- return true;
+ return DenseElementResult::Incomplete;
}
template <typename SeparatorOp>
+struct ArrayJoinDenseKernelFunctor {
+ JSContext* cx;
+ SeparatorOp sepOp;
+ HandleObject obj;
+ uint32_t length;
+ StringBuffer& sb;
+ uint32_t* numProcessed;
+
+ ArrayJoinDenseKernelFunctor(JSContext* cx, SeparatorOp sepOp, HandleObject obj,
+ uint32_t length, StringBuffer& sb, uint32_t* numProcessed)
+ : cx(cx), sepOp(sepOp), obj(obj), length(length), sb(sb), numProcessed(numProcessed)
+ {}
+
+ template <JSValueType Type>
+ DenseElementResult operator()() {
+ return ArrayJoinDenseKernel<SeparatorOp, Type>(cx, sepOp, obj, length, sb, numProcessed);
+ }
+};
+
+template <typename SeparatorOp>
static bool
ArrayJoinKernel(JSContext* cx, SeparatorOp sepOp, HandleObject obj, uint32_t length,
StringBuffer& sb)
@@ -1102,10 +1139,10 @@ ArrayJoinKernel(JSContext* cx, SeparatorOp sepOp, HandleObject obj, uint32_t len
uint32_t i = 0;
if (!ObjectMayHaveExtraIndexedProperties(obj)) {
- if (!ArrayJoinDenseKernel<SeparatorOp>(cx, sepOp, obj.as<NativeObject>(), length, sb, &i))
- {
+ ArrayJoinDenseKernelFunctor<SeparatorOp> functor(cx, sepOp, obj, length, sb, &i);
+ DenseElementResult result = CallBoxedOrUnboxedSpecialization(functor, obj);
+ if (result == DenseElementResult::Failure)
return false;
- }
}
if (i != length) {
@@ -1176,14 +1213,11 @@ js::array_join(JSContext* cx, unsigned argc, Value* vp)
// An optimized version of a special case of steps 7-11: when length==1 and
// the 0th element is a string, ToString() of that element is a no-op and
// so it can be immediately returned as the result.
- if (length == 1 && obj->isNative()) {
- NativeObject* nobj = &obj->as<NativeObject>();
- if (nobj->getDenseInitializedLength() == 1) {
- Value elem0 = nobj->getDenseElement(0);
- if (elem0.isString()) {
- args.rval().set(elem0);
- return true;
- }
+ if (length == 1 && GetAnyBoxedOrUnboxedInitializedLength(obj) == 1) {
+ Value elem0 = GetAnyBoxedOrUnboxedDenseElement(obj, 0);
+ if (elem0.isString()) {
+ args.rval().set(elem0);
+ return true;
}
}
@@ -1226,7 +1260,7 @@ js::array_join(JSContext* cx, unsigned argc, Value* vp)
}
// Step 11
- JSString* str = sb.finishString();
+ JSString *str = sb.finishString();
if (!str)
return false;
@@ -1255,6 +1289,10 @@ array_toLocaleString(JSContext* cx, unsigned argc, Value* vp)
args.rval().setString(cx->names().empty);
return true;
}
+ if (obj->is<UnboxedArrayObject>() && obj->as<UnboxedArrayObject>().length() == 0) {
+ args.rval().setString(cx->names().empty);
+ return true;
+ }
AutoCycleDetector detector(cx, obj);
if (!detector.init())
@@ -1291,9 +1329,8 @@ InitArrayElements(JSContext* cx, HandleObject obj, uint32_t start,
return false;
if (!ObjectMayHaveExtraIndexedProperties(obj)) {
- NativeObject* nobj = &obj->as<NativeObject>();
- DenseElementResult result = nobj->setOrExtendDenseElements(cx, uint32_t(start), vector,
- count, updateTypes);
+ DenseElementResult result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, start, vector, count, updateTypes);
if (result != DenseElementResult::Incomplete)
return result == DenseElementResult::Success;
}
@@ -1327,45 +1364,54 @@ InitArrayElements(JSContext* cx, HandleObject obj, uint32_t start,
return true;
}
-static DenseElementResult
-ArrayReverseDenseKernel(JSContext* cx, HandleNativeObject obj, uint32_t length)
+template <JSValueType Type>
+DenseElementResult
+ArrayReverseDenseKernel(JSContext* cx, HandleObject obj, uint32_t length)
{
/* An empty array or an array with no elements is already reversed. */
- if (length == 0 || obj->getDenseInitializedLength() == 0)
+ if (length == 0 || GetBoxedOrUnboxedInitializedLength<Type>(obj) == 0)
return DenseElementResult::Success;
- if (obj->denseElementsAreFrozen())
- return DenseElementResult::Incomplete;
+ if (Type == JSVAL_TYPE_MAGIC) {
+ if (obj->as<NativeObject>().denseElementsAreFrozen())
+ return DenseElementResult::Incomplete;
- /*
- * It's actually surprisingly complicated to reverse an array due to the
- * orthogonality of array length and array capacity while handling
- * leading and trailing holes correctly. Reversing seems less likely to
- * be a common operation than other array mass-mutation methods, so for
- * now just take a probably-small memory hit (in the absence of too many
- * holes in the array at its start) and ensure that the capacity is
- * sufficient to hold all the elements in the array if it were full.
- */
- DenseElementResult result = obj->ensureDenseElements(cx, length, 0);
- if (result != DenseElementResult::Success)
- return result;
+ /*
+ * It's actually surprisingly complicated to reverse an array due to the
+ * orthogonality of array length and array capacity while handling
+ * leading and trailing holes correctly. Reversing seems less likely to
+ * be a common operation than other array mass-mutation methods, so for
+ * now just take a probably-small memory hit (in the absence of too many
+ * holes in the array at its start) and ensure that the capacity is
+ * sufficient to hold all the elements in the array if it were full.
+ */
+ DenseElementResult result = obj->as<NativeObject>().ensureDenseElements(cx, length, 0);
+ if (result != DenseElementResult::Success)
+ return result;
- /* Fill out the array's initialized length to its proper length. */
- obj->ensureDenseInitializedLength(cx, length, 0);
+ /* Fill out the array's initialized length to its proper length. */
+ obj->as<NativeObject>().ensureDenseInitializedLength(cx, length, 0);
+ } else {
+ // Unboxed arrays can only be reversed here if their initialized length
+ // matches their actual length. Otherwise the reversal will place holes
+ // at the beginning of the array, which we don't support.
+ if (length != obj->as<UnboxedArrayObject>().initializedLength())
+ return DenseElementResult::Incomplete;
+ }
RootedValue origlo(cx), orighi(cx);
uint32_t lo = 0, hi = length - 1;
for (; lo < hi; lo++, hi--) {
- origlo = obj->getDenseElement(lo);
- orighi = obj->getDenseElement(hi);
- obj->setDenseElement(lo, orighi);
+ origlo = GetBoxedOrUnboxedDenseElement<Type>(obj, lo);
+ orighi = GetBoxedOrUnboxedDenseElement<Type>(obj, hi);
+ SetBoxedOrUnboxedDenseElementNoTypeChange<Type>(obj, lo, orighi);
if (orighi.isMagic(JS_ELEMENTS_HOLE) &&
!SuppressDeletedProperty(cx, obj, INT_TO_JSID(lo)))
{
return DenseElementResult::Failure;
}
- obj->setDenseElement(hi, origlo);
+ SetBoxedOrUnboxedDenseElementNoTypeChange<Type>(obj, hi, origlo);
if (origlo.isMagic(JS_ELEMENTS_HOLE) &&
!SuppressDeletedProperty(cx, obj, INT_TO_JSID(hi)))
{
@@ -1376,6 +1422,9 @@ ArrayReverseDenseKernel(JSContext* cx, HandleNativeObject obj, uint32_t length)
return DenseElementResult::Success;
}
+DefineBoxedOrUnboxedFunctor3(ArrayReverseDenseKernel,
+ JSContext*, HandleObject, uint32_t);
+
bool
js::array_reverse(JSContext* cx, unsigned argc, Value* vp)
{
@@ -1390,8 +1439,8 @@ js::array_reverse(JSContext* cx, unsigned argc, Value* vp)
return false;
if (!ObjectMayHaveExtraIndexedProperties(obj)) {
- DenseElementResult result =
- ArrayReverseDenseKernel(cx, obj.as<NativeObject>(), uint32_t(len));
+ ArrayReverseDenseKernelFunctor functor(cx, obj, len);
+ DenseElementResult result = CallBoxedOrUnboxedSpecialization(functor, obj);
if (result != DenseElementResult::Incomplete) {
/*
* Per ECMA-262, don't update the length of the array, even if the new
@@ -2034,8 +2083,8 @@ js::array_push(JSContext* cx, unsigned argc, Value* vp)
if (!ObjectMayHaveExtraIndexedProperties(obj)) {
DenseElementResult result =
- obj->as<NativeObject>().setOrExtendDenseElements(cx, uint32_t(length),
- args.array(), args.length());
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, length,
+ args.array(), args.length());
if (result != DenseElementResult::Incomplete) {
if (result == DenseElementResult::Failure)
return false;
@@ -2043,8 +2092,14 @@ js::array_push(JSContext* cx, unsigned argc, Value* vp)
uint32_t newlength = length + args.length();
args.rval().setNumber(newlength);
- // Handle updates to the length of non-arrays here.
- if (!obj->is<ArrayObject>())
+ // SetOrExtendAnyBoxedOrUnboxedDenseElements takes care of updating the
+ // length for boxed and unboxed arrays. Handle updates to the length of
+ // non-arrays here.
+ bool isArray;
+ if (!IsArray(cx, obj, &isArray))
+ return false;
+
+ if (!isArray)
return SetLengthProperty(cx, obj, newlength);
return true;
@@ -2100,46 +2155,42 @@ js::array_pop(JSContext* cx, unsigned argc, Value* vp)
return SetLengthProperty(cx, obj, index);
}
-void
-js::ArrayShiftMoveElements(NativeObject* obj)
+template <JSValueType Type>
+static inline DenseElementResult
+ShiftMoveBoxedOrUnboxedDenseElements(JSObject* obj)
{
- MOZ_ASSERT_IF(obj->is<ArrayObject>(), obj->as<ArrayObject>().lengthIsWritable());
-
- size_t initlen = obj->getDenseInitializedLength();
- MOZ_ASSERT(initlen > 0);
+ MOZ_ASSERT(HasBoxedOrUnboxedDenseElements<Type>(obj));
/*
* At this point the length and initialized length have already been
* decremented and the result fetched, so just shift the array elements
* themselves.
*/
- obj->moveDenseElementsNoPreBarrier(0, 1, initlen);
-}
+ size_t initlen = GetBoxedOrUnboxedInitializedLength<Type>(obj);
+ if (Type == JSVAL_TYPE_MAGIC) {
+ obj->as<NativeObject>().moveDenseElementsNoPreBarrier(0, 1, initlen);
+ } else {
+ uint8_t* data = obj->as<UnboxedArrayObject>().elements();
+ size_t elementSize = UnboxedTypeSize(Type);
+ memmove(data, data + elementSize, initlen * elementSize);
+ }
-static inline void
-SetInitializedLength(JSContext* cx, NativeObject* obj, size_t initlen)
-{
- size_t oldInitlen = obj->getDenseInitializedLength();
- obj->setDenseInitializedLength(initlen);
- if (initlen < oldInitlen)
- obj->shrinkElements(cx, initlen);
+ return DenseElementResult::Success;
}
-static DenseElementResult
-MoveDenseElements(JSContext* cx, NativeObject* obj, uint32_t dstStart, uint32_t srcStart,
- uint32_t length)
-{
- if (obj->denseElementsAreFrozen())
- return DenseElementResult::Incomplete;
+DefineBoxedOrUnboxedFunctor1(ShiftMoveBoxedOrUnboxedDenseElements, JSObject*);
- if (!obj->maybeCopyElementsForWrite(cx))
- return DenseElementResult::Failure;
- obj->moveDenseElements(dstStart, srcStart, length);
+void
+js::ArrayShiftMoveElements(JSObject* obj)
+{
+ MOZ_ASSERT_IF(obj->is<ArrayObject>(), obj->as<ArrayObject>().lengthIsWritable());
- return DenseElementResult::Success;
+ ShiftMoveBoxedOrUnboxedDenseElementsFunctor functor(obj);
+ JS_ALWAYS_TRUE(CallBoxedOrUnboxedSpecialization(functor, obj) == DenseElementResult::Success);
}
-static DenseElementResult
+template <JSValueType Type>
+DenseElementResult
ArrayShiftDenseKernel(JSContext* cx, HandleObject obj, MutableHandleValue rval)
{
if (ObjectMayHaveExtraIndexedProperties(obj))
@@ -2152,22 +2203,25 @@ ArrayShiftDenseKernel(JSContext* cx, HandleObject obj, MutableHandleValue rval)
if (MOZ_UNLIKELY(group->hasAllFlags(OBJECT_FLAG_ITERATED)))
return DenseElementResult::Incomplete;
- size_t initlen = obj->as<NativeObject>().getDenseInitializedLength();
+ size_t initlen = GetBoxedOrUnboxedInitializedLength<Type>(obj);
if (initlen == 0)
return DenseElementResult::Incomplete;
- rval.set(obj->as<NativeObject>().getDenseElement(0));
+ rval.set(GetBoxedOrUnboxedDenseElement<Type>(obj, 0));
if (rval.isMagic(JS_ELEMENTS_HOLE))
rval.setUndefined();
- DenseElementResult result = MoveDenseElements(cx, &obj->as<NativeObject>(), 0, 1, initlen - 1);
+ DenseElementResult result = MoveBoxedOrUnboxedDenseElements<Type>(cx, obj, 0, 1, initlen - 1);
if (result != DenseElementResult::Success)
return result;
- SetInitializedLength(cx, obj.as<NativeObject>(), initlen - 1);
+ SetBoxedOrUnboxedInitializedLength<Type>(cx, obj, initlen - 1);
return DenseElementResult::Success;
}
+DefineBoxedOrUnboxedFunctor3(ArrayShiftDenseKernel,
+ JSContext*, HandleObject, MutableHandleValue);
+
/* ES5 15.4.4.9 */
bool
js::array_shift(JSContext* cx, unsigned argc, Value* vp)
@@ -2199,7 +2253,8 @@ js::array_shift(JSContext* cx, unsigned argc, Value* vp)
uint32_t newlen = len - 1;
/* Fast paths. */
- DenseElementResult result = ArrayShiftDenseKernel(cx, obj, args.rval());
+ ArrayShiftDenseKernelFunctor functor(cx, obj, args.rval());
+ DenseElementResult result = CallBoxedOrUnboxedSpecialization(functor, obj);
if (result != DenseElementResult::Incomplete) {
if (result == DenseElementResult::Failure)
return false;
@@ -2253,6 +2308,9 @@ js::array_unshift(JSContext* cx, unsigned argc, Value* vp)
if (args.length() > 0) {
/* Slide up the array to make room for all args at the bottom. */
if (length > 0) {
+ // Only include a fast path for boxed arrays. Unboxed arrays can'nt
+ // be optimized here because unshifting temporarily places holes at
+ // the start of the array.
bool optimized = false;
do {
if (!obj->is<ArrayObject>())
@@ -2312,10 +2370,10 @@ js::array_unshift(JSContext* cx, unsigned argc, Value* vp)
}
/*
- * Returns true if this is a dense array whose properties ending at |endIndex|
- * (exclusive) may be accessed (get, set, delete) directly through its
- * contiguous vector of elements without fear of getters, setters, etc. along
- * the prototype chain, or of enumerators requiring notification of
+ * Returns true if this is a dense or unboxed array whose |count| properties
+ * starting from |startingIndex| may be accessed (get, set, delete) directly
+ * through its contiguous vector of elements without fear of getters, setters,
+ * etc. along the prototype chain, or of enumerators requiring notification of
* modifications.
*/
static inline bool
@@ -2326,11 +2384,11 @@ CanOptimizeForDenseStorage(HandleObject arr, uint32_t startingIndex, uint32_t co
return false;
/* There's no optimizing possible if it's not an array. */
- if (!arr->is<ArrayObject>())
+ if (!arr->is<ArrayObject>() && !arr->is<UnboxedArrayObject>())
return false;
/* If it's a frozen array, always pick the slow path */
- if (arr->as<ArrayObject>().denseElementsAreFrozen())
+ if (arr->is<ArrayObject>() && arr->as<ArrayObject>().denseElementsAreFrozen())
return false;
/*
@@ -2362,23 +2420,7 @@ CanOptimizeForDenseStorage(HandleObject arr, uint32_t startingIndex, uint32_t co
* is subsumed by the initializedLength comparison.)
*/
return !ObjectMayHaveExtraIndexedProperties(arr) &&
- startingIndex + count <= arr->as<NativeObject>().getDenseInitializedLength();
-}
-
-static inline DenseElementResult
-CopyDenseElements(JSContext* cx, NativeObject* dst, NativeObject* src,
- uint32_t dstStart, uint32_t srcStart, uint32_t length)
-{
- MOZ_ASSERT(dst->getDenseInitializedLength() == dstStart);
- MOZ_ASSERT(src->getDenseInitializedLength() >= srcStart + length);
- MOZ_ASSERT(dst->getDenseCapacity() >= dstStart + length);
-
- dst->setDenseInitializedLength(dstStart + length);
-
- const Value* vp = src->getDenseElements() + srcStart;
- dst->initDenseElements(dstStart, vp, length);
-
- return DenseElementResult::Success;
+ startingIndex + count <= GetAnyBoxedOrUnboxedInitializedLength(arr);
}
static inline bool
@@ -2472,9 +2514,7 @@ array_splice_impl(JSContext* cx, unsigned argc, Value* vp, bool returnValueIsUse
/* Steps 10-11. */
DebugOnly<DenseElementResult> result =
- CopyDenseElements(cx, &arr->as<NativeObject>(),
- &obj->as<NativeObject>(), 0,
- actualStart, actualDeleteCount);
+ CopyAnyBoxedOrUnboxedDenseElements(cx, arr, obj, 0, actualStart, actualDeleteCount);
MOZ_ASSERT(result.value == DenseElementResult::Success);
/* Step 12 (implicit). */
@@ -2511,13 +2551,14 @@ array_splice_impl(JSContext* cx, unsigned argc, Value* vp, bool returnValueIsUse
if (CanOptimizeForDenseStorage(obj, 0, len, cx)) {
/* Steps 15.a-b. */
DenseElementResult result =
- MoveDenseElements(cx, &obj->as<NativeObject>(), targetIndex, sourceIndex, len - sourceIndex);
+ MoveAnyBoxedOrUnboxedDenseElements(cx, obj, targetIndex, sourceIndex,
+ len - sourceIndex);
MOZ_ASSERT(result != DenseElementResult::Incomplete);
if (result == DenseElementResult::Failure)
return false;
/* Steps 15.c-d. */
- SetInitializedLength(cx, obj.as<NativeObject>(), finalLength);
+ SetAnyBoxedOrUnboxedInitializedLength(cx, obj, finalLength);
} else {
/*
* This is all very slow if the length is very large. We don't yet
@@ -2597,15 +2638,15 @@ array_splice_impl(JSContext* cx, unsigned argc, Value* vp, bool returnValueIsUse
if (CanOptimizeForDenseStorage(obj, len, itemCount - actualDeleteCount, cx)) {
DenseElementResult result =
- MoveDenseElements(cx, &obj->as<NativeObject>(), actualStart + itemCount,
- actualStart + actualDeleteCount,
- len - (actualStart + actualDeleteCount));
+ MoveAnyBoxedOrUnboxedDenseElements(cx, obj, actualStart + itemCount,
+ actualStart + actualDeleteCount,
+ len - (actualStart + actualDeleteCount));
MOZ_ASSERT(result != DenseElementResult::Incomplete);
if (result == DenseElementResult::Failure)
return false;
/* Steps 16.a-b. */
- SetInitializedLength(cx, obj.as<NativeObject>(), len + itemCount - actualDeleteCount);
+ SetAnyBoxedOrUnboxedInitializedLength(cx, obj, len + itemCount - actualDeleteCount);
} else {
RootedValue fromValue(cx);
for (double k = len - actualDeleteCount; k > actualStart; k--) {
@@ -2790,7 +2831,7 @@ SliceSlowly(JSContext* cx, HandleObject obj, HandleObject receiver,
}
static bool
-SliceSparse(JSContext* cx, HandleObject obj, uint32_t begin, uint32_t end, HandleArrayObject result)
+SliceSparse(JSContext* cx, HandleObject obj, uint32_t begin, uint32_t end, HandleObject result)
{
MOZ_ASSERT(begin <= end);
@@ -2840,28 +2881,26 @@ ArraySliceOrdinary(JSContext* cx, HandleObject obj, uint32_t length, uint32_t be
begin = end;
if (!ObjectMayHaveExtraIndexedProperties(obj)) {
- size_t initlen = obj->as<NativeObject>().getDenseInitializedLength();
+ size_t initlen = GetAnyBoxedOrUnboxedInitializedLength(obj);
size_t count = 0;
if (initlen > begin)
count = Min<size_t>(initlen - begin, end - begin);
- RootedArrayObject narr(cx, NewFullyAllocatedArrayTryReuseGroup(cx, obj, count));
+ RootedObject narr(cx, NewFullyAllocatedArrayTryReuseGroup(cx, obj, count));
if (!narr)
return false;
-
- MOZ_ASSERT(count >= narr->as<ArrayObject>().length());
- narr->as<ArrayObject>().setLength(cx, count);
+ SetAnyBoxedOrUnboxedArrayLength(cx, narr, end - begin);
if (count) {
DebugOnly<DenseElementResult> result =
- CopyDenseElements(cx, &narr->as<NativeObject>(), &obj->as<NativeObject>(), 0, begin, count);
+ CopyAnyBoxedOrUnboxedDenseElements(cx, narr, obj, 0, begin, count);
MOZ_ASSERT(result.value == DenseElementResult::Success);
}
arr.set(narr);
return true;
}
- RootedArrayObject narr(cx, NewPartlyAllocatedArrayTryReuseGroup(cx, obj, end - begin));
+ RootedObject narr(cx, NewPartlyAllocatedArrayTryReuseGroup(cx, obj, end - begin));
if (!narr)
return false;
@@ -2978,10 +3017,11 @@ js::array_slice(JSContext* cx, unsigned argc, Value* vp)
return true;
}
-static bool
-ArraySliceDenseKernel(JSContext* cx, ArrayObject* arr, int32_t beginArg, int32_t endArg, ArrayObject* result)
+template <JSValueType Type>
+DenseElementResult
+ArraySliceDenseKernel(JSContext* cx, JSObject* obj, int32_t beginArg, int32_t endArg, JSObject* result)
{
- int32_t length = arr->length();
+ int32_t length = GetAnyBoxedOrUnboxedArrayLength(obj);
uint32_t begin = NormalizeSliceTerm(beginArg, length);
uint32_t end = NormalizeSliceTerm(endArg, length);
@@ -2989,33 +3029,33 @@ ArraySliceDenseKernel(JSContext* cx, ArrayObject* arr, int32_t beginArg, int32_t
if (begin > end)
begin = end;
- size_t initlen = arr->getDenseInitializedLength();
- size_t count = Min<size_t>(initlen - begin, end - begin);
+ size_t initlen = GetBoxedOrUnboxedInitializedLength<Type>(obj);
if (initlen > begin) {
+ size_t count = Min<size_t>(initlen - begin, end - begin);
if (count) {
- if (!result->ensureElements(cx, count))
- return false;
- CopyDenseElements(cx, &result->as<NativeObject>(), &arr->as<NativeObject>(), 0, begin, count);
+ DenseElementResult rv = EnsureBoxedOrUnboxedDenseElements<Type>(cx, result, count);
+ if (rv != DenseElementResult::Success)
+ return rv;
+ CopyBoxedOrUnboxedDenseElements<Type, Type>(cx, result, obj, 0, begin, count);
}
}
- MOZ_ASSERT(count >= result->length());
- result->setLength(cx, count);
-
- return true;
+ SetAnyBoxedOrUnboxedArrayLength(cx, result, end - begin);
+ return DenseElementResult::Success;
}
+DefineBoxedOrUnboxedFunctor5(ArraySliceDenseKernel,
+ JSContext*, JSObject*, int32_t, int32_t, JSObject*);
+
JSObject*
js::array_slice_dense(JSContext* cx, HandleObject obj, int32_t begin, int32_t end,
HandleObject result)
{
if (result && IsArraySpecies(cx, obj)) {
- if (!ArraySliceDenseKernel(cx, &obj->as<ArrayObject>(), begin, end,
- &result->as<ArrayObject>()))
- {
- return nullptr;
- }
- return result;
+ ArraySliceDenseKernelFunctor functor(cx, obj, begin, end, result);
+ DenseElementResult rv = CallBoxedOrUnboxedSpecialization(functor, result);
+ MOZ_ASSERT(rv != DenseElementResult::Incomplete);
+ return rv == DenseElementResult::Success ? result : nullptr;
}
// Slower path if the JIT wasn't able to allocate an object inline.
@@ -3046,7 +3086,7 @@ array_isArray(JSContext* cx, unsigned argc, Value* vp)
static bool
ArrayFromCallArgs(JSContext* cx, CallArgs& args, HandleObject proto = nullptr)
{
- ArrayObject* obj = NewCopiedArrayForCallingAllocationSite(cx, args.array(), args.length(), proto);
+ JSObject* obj = NewCopiedArrayForCallingAllocationSite(cx, args.array(), args.length(), proto);
if (!obj)
return false;
@@ -3220,7 +3260,7 @@ ArrayConstructorImpl(JSContext* cx, CallArgs& args, bool isConstructor)
}
}
- ArrayObject* obj = NewPartlyAllocatedArrayForCallingAllocationSite(cx, length, proto);
+ JSObject* obj = NewPartlyAllocatedArrayForCallingAllocationSite(cx, length, proto);
if (!obj)
return false;
@@ -3246,7 +3286,7 @@ js::array_construct(JSContext* cx, unsigned argc, Value* vp)
return ArrayConstructorImpl(cx, args, /* isConstructor = */ false);
}
-ArrayObject*
+JSObject*
js::ArrayConstructorOneArg(JSContext* cx, HandleObjectGroup group, int32_t lengthInt)
{
if (lengthInt < 0) {
@@ -3541,7 +3581,7 @@ js::NewDenseFullyAllocatedArrayWithTemplate(JSContext* cx, uint32_t length, JSOb
return arr;
}
-ArrayObject*
+JSObject*
js::NewDenseCopyOnWriteArray(JSContext* cx, HandleArrayObject templateObject, gc::InitialHeap heap)
{
MOZ_ASSERT(!gc::IsInsideNursery(templateObject));
@@ -3554,21 +3594,30 @@ js::NewDenseCopyOnWriteArray(JSContext* cx, HandleArrayObject templateObject, gc
return arr;
}
-// Return a new array with the specified length and allocated capacity (up to
-// maxLength), using the specified group if possible. If the specified group
-// cannot be used, ensure that the created array at least has the given
-// [[Prototype]].
+// Return a new boxed or unboxed array with the specified length and allocated
+// capacity (up to maxLength), using the specified group if possible. If the
+// specified group cannot be used, ensure that the created array at least has
+// the given [[Prototype]].
template <uint32_t maxLength>
-static inline ArrayObject*
+static inline JSObject*
NewArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length,
NewObjectKind newKind = GenericObject)
{
MOZ_ASSERT(newKind != SingletonObject);
- if (group->shouldPreTenure())
+ if (group->maybePreliminaryObjects())
+ group->maybePreliminaryObjects()->maybeAnalyze(cx, group);
+
+ if (group->shouldPreTenure() || group->maybePreliminaryObjects())
newKind = TenuredObject;
RootedObject proto(cx, group->proto().toObject());
+ if (group->maybeUnboxedLayout()) {
+ if (length > UnboxedArrayObject::MaximumCapacity)
+ return NewArray<maxLength>(cx, length, proto, newKind);
+ return UnboxedArrayObject::create(cx, group, length, newKind, maxLength);
+ }
+
ArrayObject* res = NewArray<maxLength>(cx, length, proto, newKind);
if (!res)
return nullptr;
@@ -3580,17 +3629,20 @@ NewArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length
if (res->length() > INT32_MAX)
res->setLength(cx, res->length());
+ if (PreliminaryObjectArray* preliminaryObjects = group->maybePreliminaryObjects())
+ preliminaryObjects->registerNewObject(res);
+
return res;
}
-ArrayObject*
+JSObject*
js::NewFullyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length,
NewObjectKind newKind)
{
return NewArrayTryUseGroup<UINT32_MAX>(cx, group, length, newKind);
}
-ArrayObject*
+JSObject*
js::NewPartlyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length)
{
return NewArrayTryUseGroup<ArrayObject::EagerAllocationMaxLength>(cx, group, length);
@@ -3599,13 +3651,16 @@ js::NewPartlyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup g
// Return a new array with the default prototype and specified allocated
// capacity and length. If possible, try to reuse the group of the input
// object. The resulting array will either reuse the input object's group or
-// will have unknown property types.
+// will have unknown property types. Additionally, the result will have the
+// same boxed/unboxed elements representation as the input object, unless
+// |length| is larger than the input object's initialized length (in which case
+// UnboxedArrayObject::MaximumCapacity might be exceeded).
template <uint32_t maxLength>
-static inline ArrayObject*
+static inline JSObject*
NewArrayTryReuseGroup(JSContext* cx, HandleObject obj, size_t length,
NewObjectKind newKind = GenericObject)
{
- if (!obj->is<ArrayObject>())
+ if (!obj->is<ArrayObject>() && !obj->is<UnboxedArrayObject>())
return NewArray<maxLength>(cx, length, nullptr, newKind);
if (obj->staticPrototype() != cx->global()->maybeGetArrayPrototype())
@@ -3618,20 +3673,20 @@ NewArrayTryReuseGroup(JSContext* cx, HandleObject obj, size_t length,
return NewArrayTryUseGroup<maxLength>(cx, group, length, newKind);
}
-ArrayObject*
+JSObject*
js::NewFullyAllocatedArrayTryReuseGroup(JSContext* cx, HandleObject obj, size_t length,
NewObjectKind newKind)
{
return NewArrayTryReuseGroup<UINT32_MAX>(cx, obj, length, newKind);
}
-ArrayObject*
+JSObject*
js::NewPartlyAllocatedArrayTryReuseGroup(JSContext* cx, HandleObject obj, size_t length)
{
return NewArrayTryReuseGroup<ArrayObject::EagerAllocationMaxLength>(cx, obj, length);
}
-ArrayObject*
+JSObject*
js::NewFullyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length,
NewObjectKind newKind)
{
@@ -3641,7 +3696,7 @@ js::NewFullyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length,
return NewArrayTryUseGroup<UINT32_MAX>(cx, group, length, newKind);
}
-ArrayObject*
+JSObject*
js::NewPartlyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length, HandleObject proto)
{
RootedObjectGroup group(cx, ObjectGroup::callingAllocationSiteGroup(cx, JSProto_Array, proto));
@@ -3650,23 +3705,68 @@ js::NewPartlyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length
return NewArrayTryUseGroup<ArrayObject::EagerAllocationMaxLength>(cx, group, length);
}
-ArrayObject*
+bool
+js::MaybeAnalyzeBeforeCreatingLargeArray(ExclusiveContext* cx, HandleObjectGroup group,
+ const Value* vp, size_t length)
+{
+ static const size_t EagerPreliminaryObjectAnalysisThreshold = 800;
+
+ // Force analysis to see if an unboxed array can be used when making a
+ // sufficiently large array, to avoid excessive analysis and copying later
+ // on. If this is the first array of its group that is being created, first
+ // make a dummy array with the initial elements of the array we are about
+ // to make, so there is some basis for the unboxed array analysis.
+ if (length > EagerPreliminaryObjectAnalysisThreshold) {
+ if (PreliminaryObjectArrayWithTemplate* objects = group->maybePreliminaryObjects()) {
+ if (objects->empty()) {
+ size_t nlength = Min<size_t>(length, 100);
+ JSObject* obj = NewFullyAllocatedArrayTryUseGroup(cx, group, nlength);
+ if (!obj)
+ return false;
+ DebugOnly<DenseElementResult> result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, 0, vp, nlength,
+ ShouldUpdateTypes::Update);
+ MOZ_ASSERT(result.value == DenseElementResult::Success);
+ }
+ objects->maybeAnalyze(cx, group, /* forceAnalyze = */ true);
+ }
+ }
+ return true;
+}
+
+JSObject*
js::NewCopiedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group,
const Value* vp, size_t length, NewObjectKind newKind,
ShouldUpdateTypes updateTypes)
{
- ArrayObject* obj = NewFullyAllocatedArrayTryUseGroup(cx, group, length, newKind);
+ if (!MaybeAnalyzeBeforeCreatingLargeArray(cx, group, vp, length))
+ return nullptr;
+
+ JSObject* obj = NewFullyAllocatedArrayTryUseGroup(cx, group, length, newKind);
if (!obj)
return nullptr;
- DenseElementResult result = obj->setOrExtendDenseElements(cx, 0, vp, length, updateTypes);
+ DenseElementResult result =
+ SetOrExtendAnyBoxedOrUnboxedDenseElements(cx, obj, 0, vp, length, updateTypes);
+ if (result == DenseElementResult::Failure)
+ return nullptr;
+ if (result == DenseElementResult::Success)
+ return obj;
+
+ MOZ_ASSERT(obj->is<UnboxedArrayObject>());
+ if (!UnboxedArrayObject::convertToNative(cx->asJSContext(), obj))
+ return nullptr;
+
+ result = SetOrExtendBoxedOrUnboxedDenseElements<JSVAL_TYPE_MAGIC>(cx, obj, 0, vp, length,
+ updateTypes);
+ MOZ_ASSERT(result != DenseElementResult::Incomplete);
if (result == DenseElementResult::Failure)
return nullptr;
- MOZ_ASSERT(result == DenseElementResult::Success);
+
return obj;
}
-ArrayObject*
+JSObject*
js::NewCopiedArrayForCallingAllocationSite(JSContext* cx, const Value* vp, size_t length,
HandleObject proto /* = nullptr */)
{
diff --git a/js/src/jsarray.h b/js/src/jsarray.h
index d0084731f..0ca580ba7 100644
--- a/js/src/jsarray.h
+++ b/js/src/jsarray.h
@@ -72,37 +72,49 @@ extern ArrayObject*
NewDenseFullyAllocatedArrayWithTemplate(JSContext* cx, uint32_t length, JSObject* templateObject);
/* Create a dense array with the same copy-on-write elements as another object. */
-extern ArrayObject*
+extern JSObject*
NewDenseCopyOnWriteArray(JSContext* cx, HandleArrayObject templateObject, gc::InitialHeap heap);
-extern ArrayObject*
+// The methods below can create either boxed or unboxed arrays.
+
+extern JSObject*
NewFullyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length,
NewObjectKind newKind = GenericObject);
-extern ArrayObject*
+extern JSObject*
NewPartlyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length);
-extern ArrayObject*
+extern JSObject*
NewFullyAllocatedArrayTryReuseGroup(JSContext* cx, HandleObject obj, size_t length,
NewObjectKind newKind = GenericObject);
-extern ArrayObject*
+extern JSObject*
NewPartlyAllocatedArrayTryReuseGroup(JSContext* cx, HandleObject obj, size_t length);
-extern ArrayObject*
+extern JSObject*
NewFullyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length,
NewObjectKind newKind = GenericObject);
-extern ArrayObject*
+extern JSObject*
NewPartlyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length, HandleObject proto);
-extern ArrayObject*
+enum class ShouldUpdateTypes
+{
+ Update,
+ DontUpdate
+};
+
+extern bool
+MaybeAnalyzeBeforeCreatingLargeArray(ExclusiveContext* cx, HandleObjectGroup group,
+ const Value* vp, size_t length);
+
+extern JSObject*
NewCopiedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group,
const Value* vp, size_t length,
NewObjectKind newKind = GenericObject,
ShouldUpdateTypes updateTypes = ShouldUpdateTypes::Update);
-extern ArrayObject*
+extern JSObject*
NewCopiedArrayForCallingAllocationSite(JSContext* cx, const Value* vp, size_t length,
HandleObject proto = nullptr);
@@ -117,6 +129,13 @@ NewValuePair(JSContext* cx, const Value& val1, const Value& val2, MutableHandleV
extern bool
WouldDefinePastNonwritableLength(HandleNativeObject obj, uint32_t index);
+/*
+ * Canonicalize |vp| to a uint32_t value potentially suitable for use as an
+ * array length.
+ */
+extern bool
+CanonicalizeArrayLengthValue(JSContext* cx, HandleValue v, uint32_t* canonicalized);
+
extern bool
GetLengthProperty(JSContext* cx, HandleObject obj, uint32_t* lengthp);
@@ -150,7 +169,7 @@ extern bool
array_join(JSContext* cx, unsigned argc, js::Value* vp);
extern void
-ArrayShiftMoveElements(NativeObject* obj);
+ArrayShiftMoveElements(JSObject* obj);
extern bool
array_shift(JSContext* cx, unsigned argc, js::Value* vp);
@@ -182,7 +201,7 @@ extern const JSJitInfo array_splice_info;
extern bool
NewbornArrayPush(JSContext* cx, HandleObject obj, const Value& v);
-extern ArrayObject*
+extern JSObject*
ArrayConstructorOneArg(JSContext* cx, HandleObjectGroup group, int32_t lengthInt);
#ifdef DEBUG
diff --git a/js/src/jsfriendapi.cpp b/js/src/jsfriendapi.cpp
index f818bb290..515f62213 100644
--- a/js/src/jsfriendapi.cpp
+++ b/js/src/jsfriendapi.cpp
@@ -270,7 +270,7 @@ js::GetBuiltinClass(JSContext* cx, HandleObject obj, ESClass* cls)
if (obj->is<PlainObject>() || obj->is<UnboxedPlainObject>())
*cls = ESClass::Object;
- else if (obj->is<ArrayObject>())
+ else if (obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>())
*cls = ESClass::Array;
else if (obj->is<NumberObject>())
*cls = ESClass::Number;
diff --git a/js/src/jsobj.cpp b/js/src/jsobj.cpp
index 3d7f294fe..901a9f505 100644
--- a/js/src/jsobj.cpp
+++ b/js/src/jsobj.cpp
@@ -1136,18 +1136,19 @@ js::CloneObject(JSContext* cx, HandleObject obj, Handle<js::TaggedProto> proto)
}
static bool
-GetScriptArrayObjectElements(JSContext* cx, HandleArrayObject arr, MutableHandle<GCVector<Value>> values)
+GetScriptArrayObjectElements(JSContext* cx, HandleObject obj, MutableHandle<GCVector<Value>> values)
{
- MOZ_ASSERT(!arr->isSingleton());
- MOZ_ASSERT(!arr->isIndexed());
+ MOZ_ASSERT(!obj->isSingleton());
+ MOZ_ASSERT(obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>());
+ MOZ_ASSERT(!obj->isIndexed());
- size_t length = arr->length();
+ size_t length = GetAnyBoxedOrUnboxedArrayLength(obj);
if (!values.appendN(MagicValue(JS_ELEMENTS_HOLE), length))
return false;
- size_t initlen = arr->getDenseInitializedLength();
+ size_t initlen = GetAnyBoxedOrUnboxedInitializedLength(obj);
for (size_t i = 0; i < initlen; i++)
- values[i].set(arr->getDenseElement(i));
+ values[i].set(GetAnyBoxedOrUnboxedDenseElement(obj, i));
return true;
}
@@ -1199,12 +1200,13 @@ js::DeepCloneObjectLiteral(JSContext* cx, HandleObject obj, NewObjectKind newKin
MOZ_ASSERT_IF(obj->isSingleton(),
cx->compartment()->behaviors().getSingletonsAsTemplates());
MOZ_ASSERT(obj->is<PlainObject>() ||
- obj->is<ArrayObject>());
+ obj->is<ArrayObject>() ||
+ obj->is<UnboxedArrayObject>());
MOZ_ASSERT(newKind != SingletonObject);
- if (obj->is<ArrayObject>()) {
+ if (obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>()) {
Rooted<GCVector<Value>> values(cx, GCVector<Value>(cx));
- if (!GetScriptArrayObjectElements(cx, obj.as<ArrayObject>(), &values))
+ if (!GetScriptArrayObjectElements(cx, obj, &values))
return nullptr;
// Deep clone any elements.
@@ -1318,8 +1320,9 @@ js::XDRObjectLiteral(XDRState<mode>* xdr, MutableHandleObject obj)
{
if (mode == XDR_ENCODE) {
MOZ_ASSERT(obj->is<PlainObject>() ||
- obj->is<ArrayObject>());
- isArray = obj->is<ArrayObject>() ? 1 : 0;
+ obj->is<ArrayObject>() ||
+ obj->is<UnboxedArrayObject>());
+ isArray = (obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>()) ? 1 : 0;
}
if (!xdr->codeUint32(&isArray))
@@ -1331,11 +1334,8 @@ js::XDRObjectLiteral(XDRState<mode>* xdr, MutableHandleObject obj)
if (isArray) {
Rooted<GCVector<Value>> values(cx, GCVector<Value>(cx));
- if (mode == XDR_ENCODE) {
- RootedArrayObject arr(cx, &obj->as<ArrayObject>());
- if (!GetScriptArrayObjectElements(cx, arr, &values))
- return false;
- }
+ if (mode == XDR_ENCODE && !GetScriptArrayObjectElements(cx, obj, &values))
+ return false;
uint32_t initialized;
if (mode == XDR_ENCODE)
@@ -2315,6 +2315,11 @@ js::LookupOwnPropertyPure(ExclusiveContext* cx, JSObject* obj, jsid id, Shape**
// us the resolve hook won't define a property with this id.
if (ClassMayResolveId(cx->names(), obj->getClass(), id, obj))
return false;
+ } else if (obj->is<UnboxedArrayObject>()) {
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ MarkNonNativePropertyFound<NoGC>(propp);
+ return true;
+ }
} else if (obj->is<TypedObject>()) {
if (obj->as<TypedObject>().typeDescr().hasProperty(cx->names(), id)) {
MarkNonNativePropertyFound<NoGC>(propp);
@@ -3606,6 +3611,16 @@ JSObject::allocKindForTenure(const js::Nursery& nursery) const
if (IsProxy(this))
return as<ProxyObject>().allocKindForTenure();
+ // Unboxed arrays use inline data if their size is small enough.
+ if (is<UnboxedArrayObject>()) {
+ const UnboxedArrayObject* nobj = &as<UnboxedArrayObject>();
+ size_t nbytes = UnboxedArrayObject::offsetOfInlineElements() +
+ nobj->capacity() * nobj->elementSize();
+ if (nbytes <= JSObject::MAX_BYTE_SIZE)
+ return GetGCObjectKindForBytes(nbytes);
+ return AllocKind::OBJECT0;
+ }
+
// Inlined typed objects are followed by their data, so make sure we copy
// it all over to the new object.
if (is<InlineTypedObject>()) {
diff --git a/js/src/jsobjinlines.h b/js/src/jsobjinlines.h
index 889033143..a82725ee8 100644
--- a/js/src/jsobjinlines.h
+++ b/js/src/jsobjinlines.h
@@ -40,6 +40,8 @@ MaybeConvertUnboxedObjectToNative(ExclusiveContext* cx, JSObject* obj)
{
if (obj->is<UnboxedPlainObject>())
return UnboxedPlainObject::convertToNative(cx->asJSContext(), obj);
+ if (obj->is<UnboxedArrayObject>())
+ return UnboxedArrayObject::convertToNative(cx->asJSContext(), obj);
return true;
}
diff --git a/js/src/jsstr.cpp b/js/src/jsstr.cpp
index 3964ab84e..77c72d243 100644
--- a/js/src/jsstr.cpp
+++ b/js/src/jsstr.cpp
@@ -2373,7 +2373,7 @@ js::str_replace_string_raw(JSContext* cx, HandleString string, HandleString patt
}
// ES 2016 draft Mar 25, 2016 21.1.3.17 steps 4, 8, 12-18.
-static ArrayObject*
+static JSObject*
SplitHelper(JSContext* cx, HandleLinearString str, uint32_t limit, HandleLinearString sep,
HandleObjectGroup group)
{
@@ -2470,7 +2470,7 @@ SplitHelper(JSContext* cx, HandleLinearString str, uint32_t limit, HandleLinearS
}
// Fast-path for splitting a string into a character array via split("").
-static ArrayObject*
+static JSObject*
CharSplitHelper(JSContext* cx, HandleLinearString str, uint32_t limit, HandleObjectGroup group)
{
size_t strLength = str->length();
@@ -2495,7 +2495,7 @@ CharSplitHelper(JSContext* cx, HandleLinearString str, uint32_t limit, HandleObj
}
// ES 2016 draft Mar 25, 2016 21.1.3.17 steps 4, 8, 12-18.
-ArrayObject*
+JSObject*
js::str_split_string(JSContext* cx, HandleObjectGroup group, HandleString str, HandleString sep, uint32_t limit)
{
diff --git a/js/src/jsstr.h b/js/src/jsstr.h
index 68175c826..38fbfa85e 100644
--- a/js/src/jsstr.h
+++ b/js/src/jsstr.h
@@ -465,7 +465,7 @@ FileEscapedString(FILE* fp, const char* chars, size_t length, uint32_t quote)
return res;
}
-ArrayObject*
+JSObject*
str_split_string(JSContext* cx, HandleObjectGroup group, HandleString str, HandleString sep,
uint32_t limit);
diff --git a/js/src/shell/js.cpp b/js/src/shell/js.cpp
index e077bbbf8..35a527c5e 100644
--- a/js/src/shell/js.cpp
+++ b/js/src/shell/js.cpp
@@ -317,6 +317,7 @@ static bool enableIon = false;
static bool enableAsmJS = false;
static bool enableWasm = false;
static bool enableNativeRegExp = false;
+static bool enableUnboxedArrays = false;
static bool enableSharedMemory = SHARED_MEMORY_DEFAULT;
static bool enableWasmAlwaysBaseline = false;
static bool enableArrayProtoValues = true;
@@ -7262,6 +7263,7 @@ SetContextOptions(JSContext* cx, const OptionParser& op)
enableAsmJS = !op.getBoolOption("no-asmjs");
enableWasm = !op.getBoolOption("no-wasm");
enableNativeRegExp = !op.getBoolOption("no-native-regexp");
+ enableUnboxedArrays = op.getBoolOption("unboxed-arrays");
enableWasmAlwaysBaseline = op.getBoolOption("wasm-always-baseline");
enableArrayProtoValues = !op.getBoolOption("no-array-proto-values");
@@ -7271,6 +7273,7 @@ SetContextOptions(JSContext* cx, const OptionParser& op)
.setWasm(enableWasm)
.setWasmAlwaysBaseline(enableWasmAlwaysBaseline)
.setNativeRegExp(enableNativeRegExp)
+ .setUnboxedArrays(enableUnboxedArrays)
.setArrayProtoValues(enableArrayProtoValues);
if (op.getBoolOption("wasm-check-bce"))
@@ -7710,6 +7713,7 @@ main(int argc, char** argv, char** envp)
|| !op.addBoolOption('\0', "no-wasm", "Disable WebAssembly compilation")
|| !op.addBoolOption('\0', "no-native-regexp", "Disable native regexp compilation")
|| !op.addBoolOption('\0', "no-unboxed-objects", "Disable creating unboxed plain objects")
+ || !op.addBoolOption('\0', "unboxed-arrays", "Allow creating unboxed arrays")
|| !op.addBoolOption('\0', "wasm-always-baseline", "Enable wasm baseline compiler when possible")
|| !op.addBoolOption('\0', "wasm-check-bce", "Always generate wasm bounds check, even redundant ones.")
|| !op.addBoolOption('\0', "no-array-proto-values", "Remove Array.prototype.values")
diff --git a/js/src/vm/Interpreter-inl.h b/js/src/vm/Interpreter-inl.h
index acfa8f74b..adefa6e93 100644
--- a/js/src/vm/Interpreter-inl.h
+++ b/js/src/vm/Interpreter-inl.h
@@ -593,7 +593,7 @@ InitArrayElemOperation(JSContext* cx, jsbytecode* pc, HandleObject obj, uint32_t
JSOp op = JSOp(*pc);
MOZ_ASSERT(op == JSOP_INITELEM_ARRAY || op == JSOP_INITELEM_INC);
- MOZ_ASSERT(obj->is<ArrayObject>());
+ MOZ_ASSERT(obj->is<ArrayObject>() || obj->is<UnboxedArrayObject>());
if (op == JSOP_INITELEM_INC && index == INT32_MAX) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_SPREAD_TOO_LARGE);
diff --git a/js/src/vm/Interpreter.cpp b/js/src/vm/Interpreter.cpp
index b87d12924..834084c4d 100644
--- a/js/src/vm/Interpreter.cpp
+++ b/js/src/vm/Interpreter.cpp
@@ -1939,7 +1939,6 @@ CASE(EnableInterruptsPseudoOpcode)
/* Various 1-byte no-ops. */
CASE(JSOP_NOP)
CASE(JSOP_NOP_DESTRUCTURING)
-CASE(JSOP_UNUSED126)
CASE(JSOP_UNUSED211)
CASE(JSOP_TRY_DESTRUCTURING_ITERCLOSE)
CASE(JSOP_UNUSED221)
@@ -3682,6 +3681,7 @@ CASE(JSOP_NEWINIT)
END_CASE(JSOP_NEWINIT)
CASE(JSOP_NEWARRAY)
+CASE(JSOP_SPREADCALLARRAY)
{
uint32_t length = GET_UINT32(REGS.pc);
JSObject* obj = NewArrayOperation(cx, script, REGS.pc, length);
@@ -4979,7 +4979,7 @@ js::NewObjectOperation(JSContext* cx, HandleScript script, jsbytecode* pc,
newKind = TenuredObject;
}
- RootedPlainObject obj(cx);
+ RootedObject obj(cx);
if (*pc == JSOP_NEWOBJECT) {
RootedPlainObject baseObject(cx, &script->getObject(pc)->as<PlainObject>());
@@ -5047,6 +5047,9 @@ js::NewArrayOperation(JSContext* cx, HandleScript script, jsbytecode* pc, uint32
if (group->shouldPreTenure() || group->maybePreliminaryObjects())
newKind = TenuredObject;
+
+ if (group->maybeUnboxedLayout())
+ return UnboxedArrayObject::create(cx, group, length, newKind);
}
ArrayObject* obj = NewDenseFullyAllocatedArray(cx, length, nullptr, newKind);
@@ -5057,6 +5060,9 @@ js::NewArrayOperation(JSContext* cx, HandleScript script, jsbytecode* pc, uint32
MOZ_ASSERT(obj->isSingleton());
} else {
obj->setGroup(group);
+
+ if (PreliminaryObjectArray* preliminaryObjects = group->maybePreliminaryObjects())
+ preliminaryObjects->registerNewObject(obj);
}
return obj;
@@ -5069,6 +5075,12 @@ js::NewArrayOperationWithTemplate(JSContext* cx, HandleObject templateObject)
NewObjectKind newKind = templateObject->group()->shouldPreTenure() ? TenuredObject : GenericObject;
+ if (templateObject->is<UnboxedArrayObject>()) {
+ uint32_t length = templateObject->as<UnboxedArrayObject>().length();
+ RootedObjectGroup group(cx, templateObject->group());
+ return UnboxedArrayObject::create(cx, group, length, newKind);
+ }
+
ArrayObject* obj = NewDenseFullyAllocatedArray(cx, templateObject->as<ArrayObject>().length(),
nullptr, newKind);
if (!obj)
diff --git a/js/src/vm/JSONParser.cpp b/js/src/vm/JSONParser.cpp
index e50da3bc4..01883bb15 100644
--- a/js/src/vm/JSONParser.cpp
+++ b/js/src/vm/JSONParser.cpp
@@ -606,8 +606,8 @@ JSONParserBase::finishArray(MutableHandleValue vp, ElementVector& elements)
{
MOZ_ASSERT(&elements == &stack.back().elements());
- ArrayObject* obj = ObjectGroup::newArrayObject(cx, elements.begin(), elements.length(),
- GenericObject);
+ JSObject* obj = ObjectGroup::newArrayObject(cx, elements.begin(), elements.length(),
+ GenericObject);
if (!obj)
return false;
diff --git a/js/src/vm/NativeObject-inl.h b/js/src/vm/NativeObject-inl.h
index 030d92c12..205d99aa2 100644
--- a/js/src/vm/NativeObject-inl.h
+++ b/js/src/vm/NativeObject-inl.h
@@ -235,38 +235,6 @@ NativeObject::ensureDenseElements(ExclusiveContext* cx, uint32_t index, uint32_t
return DenseElementResult::Success;
}
-inline DenseElementResult
-NativeObject::setOrExtendDenseElements(ExclusiveContext* cx, uint32_t start, const Value* vp,
- uint32_t count,
- ShouldUpdateTypes updateTypes)
-{
- if (denseElementsAreFrozen())
- return DenseElementResult::Incomplete;
-
- if (is<ArrayObject>() &&
- !as<ArrayObject>().lengthIsWritable() &&
- start + count >= as<ArrayObject>().length())
- {
- return DenseElementResult::Incomplete;
- }
-
- DenseElementResult result = ensureDenseElements(cx, start, count);
- if (result != DenseElementResult::Success)
- return result;
-
- if (is<ArrayObject>() && start + count >= as<ArrayObject>().length())
- as<ArrayObject>().setLengthInt32(start + count);
-
- if (updateTypes == ShouldUpdateTypes::DontUpdate && !shouldConvertDoubleElements()) {
- copyDenseElements(start, vp, count);
- } else {
- for (size_t i = 0; i < count; i++)
- setDenseElementWithType(cx, start + i, vp[i]);
- }
-
- return DenseElementResult::Success;
-}
-
inline Value
NativeObject::getDenseOrTypedArrayElement(uint32_t idx)
{
diff --git a/js/src/vm/NativeObject.h b/js/src/vm/NativeObject.h
index 6595703dc..107fade8c 100644
--- a/js/src/vm/NativeObject.h
+++ b/js/src/vm/NativeObject.h
@@ -339,19 +339,16 @@ IsObjectValueInCompartment(const Value& v, JSCompartment* comp);
#endif
// Operations which change an object's dense elements can either succeed, fail,
-// or be unable to complete. The latter is used when the object's elements must
-// become sparse instead. The enum below is used for such operations.
+// or be unable to complete. For native objects, the latter is used when the
+// object's elements must become sparse instead. The enum below is used for
+// such operations, and for similar operations on unboxed arrays and methods
+// that work on both kinds of objects.
enum class DenseElementResult {
Failure,
Success,
Incomplete
};
-enum class ShouldUpdateTypes {
- Update,
- DontUpdate
-};
-
/*
* NativeObject specifies the internal implementation of a native object.
*
@@ -1154,10 +1151,6 @@ class NativeObject : public ShapedObject
elementsRangeWriteBarrierPost(dstStart, count);
}
- inline DenseElementResult
- setOrExtendDenseElements(ExclusiveContext* cx, uint32_t start, const Value* vp, uint32_t count,
- ShouldUpdateTypes updateTypes = ShouldUpdateTypes::Update);
-
bool shouldConvertDoubleElements() {
return getElementsHeader()->shouldConvertDoubleElements();
}
diff --git a/js/src/vm/ObjectGroup.cpp b/js/src/vm/ObjectGroup.cpp
index 95fcada94..d05a48646 100644
--- a/js/src/vm/ObjectGroup.cpp
+++ b/js/src/vm/ObjectGroup.cpp
@@ -777,7 +777,7 @@ GetValueTypeForTable(const Value& v)
return type;
}
-/* static */ ArrayObject*
+/* static */ JSObject*
ObjectGroup::newArrayObject(ExclusiveContext* cx,
const Value* vp, size_t length,
NewObjectKind newKind, NewArrayKind arrayKind)
@@ -841,13 +841,56 @@ ObjectGroup::newArrayObject(ExclusiveContext* cx,
AddTypePropertyId(cx, group, nullptr, JSID_VOID, elementType);
+ if (elementType != TypeSet::UnknownType()) {
+ // Keep track of the initial objects we create with this type.
+ // If the initial ones have a consistent shape and property types, we
+ // will try to use an unboxed layout for the group.
+ PreliminaryObjectArrayWithTemplate* preliminaryObjects =
+ cx->new_<PreliminaryObjectArrayWithTemplate>(nullptr);
+ if (!preliminaryObjects)
+ return nullptr;
+ group->setPreliminaryObjects(preliminaryObjects);
+ }
+
if (!p.add(cx, *table, ObjectGroupCompartment::ArrayObjectKey(elementType), group))
return nullptr;
}
// The type of the elements being added will already be reflected in type
- // information.
+ // information, but make sure when creating an unboxed array that the
+ // common element type is suitable for the unboxed representation.
ShouldUpdateTypes updateTypes = ShouldUpdateTypes::DontUpdate;
+ if (!MaybeAnalyzeBeforeCreatingLargeArray(cx, group, vp, length))
+ return nullptr;
+ if (group->maybePreliminaryObjects())
+ group->maybePreliminaryObjects()->maybeAnalyze(cx, group);
+ if (group->maybeUnboxedLayout()) {
+ switch (group->unboxedLayout().elementType()) {
+ case JSVAL_TYPE_BOOLEAN:
+ if (elementType != TypeSet::BooleanType())
+ updateTypes = ShouldUpdateTypes::Update;
+ break;
+ case JSVAL_TYPE_INT32:
+ if (elementType != TypeSet::Int32Type())
+ updateTypes = ShouldUpdateTypes::Update;
+ break;
+ case JSVAL_TYPE_DOUBLE:
+ if (elementType != TypeSet::Int32Type() && elementType != TypeSet::DoubleType())
+ updateTypes = ShouldUpdateTypes::Update;
+ break;
+ case JSVAL_TYPE_STRING:
+ if (elementType != TypeSet::StringType())
+ updateTypes = ShouldUpdateTypes::Update;
+ break;
+ case JSVAL_TYPE_OBJECT:
+ if (elementType != TypeSet::NullType() && !elementType.get().isObjectUnchecked())
+ updateTypes = ShouldUpdateTypes::Update;
+ break;
+ default:
+ MOZ_CRASH();
+ }
+ }
+
return NewCopiedArrayTryUseGroup(cx, group, vp, length, newKind, updateTypes);
}
@@ -857,15 +900,49 @@ GiveObjectGroup(ExclusiveContext* cx, JSObject* source, JSObject* target)
{
MOZ_ASSERT(source->group() != target->group());
- if (!target->is<ArrayObject>() || !source->is<ArrayObject>()) {
+ if (!target->is<ArrayObject>() && !target->is<UnboxedArrayObject>())
return true;
+
+ if (target->group()->maybePreliminaryObjects()) {
+ bool force = IsInsideNursery(source);
+ target->group()->maybePreliminaryObjects()->maybeAnalyze(cx, target->group(), force);
}
- source->setGroup(target->group());
+ if (target->is<ArrayObject>()) {
+ ObjectGroup* sourceGroup = source->group();
- for (size_t i = 0; i < source->as<ArrayObject>().getDenseInitializedLength(); i++) {
- Value v = source->as<ArrayObject>().getDenseElement(i);
- AddTypePropertyId(cx, source->group(), source, JSID_VOID, v);
+ if (source->is<UnboxedArrayObject>()) {
+ Shape* shape = target->as<ArrayObject>().lastProperty();
+ if (!UnboxedArrayObject::convertToNativeWithGroup(cx, source, target->group(), shape))
+ return false;
+ } else if (source->is<ArrayObject>()) {
+ source->setGroup(target->group());
+ } else {
+ return true;
+ }
+
+ if (sourceGroup->maybePreliminaryObjects())
+ sourceGroup->maybePreliminaryObjects()->unregisterObject(source);
+ if (target->group()->maybePreliminaryObjects())
+ target->group()->maybePreliminaryObjects()->registerNewObject(source);
+
+ for (size_t i = 0; i < source->as<ArrayObject>().getDenseInitializedLength(); i++) {
+ Value v = source->as<ArrayObject>().getDenseElement(i);
+ AddTypePropertyId(cx, source->group(), source, JSID_VOID, v);
+ }
+
+ return true;
+ }
+
+ if (target->is<UnboxedArrayObject>()) {
+ if (!source->is<UnboxedArrayObject>())
+ return true;
+ if (source->as<UnboxedArrayObject>().elementType() != JSVAL_TYPE_INT32)
+ return true;
+ if (target->as<UnboxedArrayObject>().elementType() != JSVAL_TYPE_DOUBLE)
+ return true;
+
+ return source->as<UnboxedArrayObject>().convertInt32ToDouble(cx, target->group());
}
return true;
@@ -1429,6 +1506,18 @@ ObjectGroup::allocationSiteGroup(JSContext* cx, JSScript* scriptArg, jsbytecode*
}
}
+ if (kind == JSProto_Array &&
+ (JSOp(*pc) == JSOP_NEWARRAY || IsCallPC(pc)) &&
+ cx->options().unboxedArrays())
+ {
+ PreliminaryObjectArrayWithTemplate* preliminaryObjects =
+ cx->new_<PreliminaryObjectArrayWithTemplate>(nullptr);
+ if (preliminaryObjects)
+ res->setPreliminaryObjects(preliminaryObjects);
+ else
+ cx->recoverFromOutOfMemory();
+ }
+
if (!table->add(p, key, res)) {
ReportOutOfMemory(cx);
return nullptr;
diff --git a/js/src/vm/ObjectGroup.h b/js/src/vm/ObjectGroup.h
index 553cb8366..4e24de9f1 100644
--- a/js/src/vm/ObjectGroup.h
+++ b/js/src/vm/ObjectGroup.h
@@ -505,11 +505,11 @@ class ObjectGroup : public gc::TenuredCell
UnknownIndex // Make an array with an unknown element type.
};
- // Create an ArrayObject with the specified elements and a group specialized
- // for the elements.
- static ArrayObject* newArrayObject(ExclusiveContext* cx, const Value* vp, size_t length,
- NewObjectKind newKind,
- NewArrayKind arrayKind = NewArrayKind::Normal);
+ // Create an ArrayObject or UnboxedArrayObject with the specified elements
+ // and a group specialized for the elements.
+ static JSObject* newArrayObject(ExclusiveContext* cx, const Value* vp, size_t length,
+ NewObjectKind newKind,
+ NewArrayKind arrayKind = NewArrayKind::Normal);
// Create a PlainObject or UnboxedPlainObject with the specified properties
// and a group specialized for those properties.
diff --git a/js/src/vm/Opcodes.h b/js/src/vm/Opcodes.h
index e13cd6221..b26336815 100644
--- a/js/src/vm/Opcodes.h
+++ b/js/src/vm/Opcodes.h
@@ -1281,7 +1281,17 @@
* Stack: receiver, obj, propval => obj[propval]
*/ \
macro(JSOP_GETELEM_SUPER, 125, "getelem-super", NULL, 1, 3, 1, JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC) \
- macro(JSOP_UNUSED126, 126, "unused126", NULL, 5, 0, 1, JOF_UINT32) \
+ /*
+ * Pushes newly created array for a spread call onto the stack. This has
+ * the same semantics as JSOP_NEWARRAY, but is distinguished to avoid
+ * using unboxed arrays in spread calls, which would make compiling spread
+ * calls in baseline more complex.
+ * Category: Literals
+ * Type: Array
+ * Operands: uint32_t length
+ * Stack: => obj
+ */ \
+ macro(JSOP_SPREADCALLARRAY, 126, "spreadcallarray", NULL, 5, 0, 1, JOF_UINT32) \
\
/*
* Defines the given function on the current scope.
diff --git a/js/src/vm/ReceiverGuard.cpp b/js/src/vm/ReceiverGuard.cpp
index e37bf8ee5..11c2d0727 100644
--- a/js/src/vm/ReceiverGuard.cpp
+++ b/js/src/vm/ReceiverGuard.cpp
@@ -19,7 +19,7 @@ ReceiverGuard::ReceiverGuard(JSObject* obj)
group = obj->group();
if (UnboxedExpandoObject* expando = obj->as<UnboxedPlainObject>().maybeExpando())
shape = expando->lastProperty();
- } else if (obj->is<TypedObject>()) {
+ } else if (obj->is<UnboxedArrayObject>() || obj->is<TypedObject>()) {
group = obj->group();
} else {
shape = obj->maybeShape();
@@ -34,7 +34,7 @@ ReceiverGuard::ReceiverGuard(ObjectGroup* group, Shape* shape)
const Class* clasp = group->clasp();
if (clasp == &UnboxedPlainObject::class_) {
// Keep both group and shape.
- } else if (IsTypedObjectClass(clasp)) {
+ } else if (clasp == &UnboxedArrayObject::class_ || IsTypedObjectClass(clasp)) {
this->shape = nullptr;
} else {
this->group = nullptr;
@@ -49,8 +49,8 @@ HeapReceiverGuard::keyBits(JSObject* obj)
// Both the group and shape need to be guarded for unboxed plain objects.
return obj->as<UnboxedPlainObject>().maybeExpando() ? 0 : 1;
}
- if (obj->is<TypedObject>()) {
- // Only the group needs to be guarded for typed objects.
+ if (obj->is<UnboxedArrayObject>() || obj->is<TypedObject>()) {
+ // Only the group needs to be guarded for unboxed arrays and typed objects.
return 2;
}
// Other objects only need the shape to be guarded.
diff --git a/js/src/vm/Stack.cpp b/js/src/vm/Stack.cpp
index 95940eeaf..7eb8f4ab8 100644
--- a/js/src/vm/Stack.cpp
+++ b/js/src/vm/Stack.cpp
@@ -82,7 +82,7 @@ InterpreterFrame::isNonGlobalEvalFrame() const
return isEvalFrame() && script()->bodyScope()->as<EvalScope>().isNonGlobal();
}
-ArrayObject*
+JSObject*
InterpreterFrame::createRestParameter(JSContext* cx)
{
MOZ_ASSERT(script()->hasRest());
diff --git a/js/src/vm/Stack.h b/js/src/vm/Stack.h
index fe04a00f2..d08544213 100644
--- a/js/src/vm/Stack.h
+++ b/js/src/vm/Stack.h
@@ -523,7 +523,7 @@ class InterpreterFrame
ArgumentsObject& argsObj() const;
void initArgsObj(ArgumentsObject& argsobj);
- ArrayObject* createRestParameter(JSContext* cx);
+ JSObject* createRestParameter(JSContext* cx);
/*
* Environment chain
diff --git a/js/src/vm/TypeInference.cpp b/js/src/vm/TypeInference.cpp
index 39206539b..ee5bbef5d 100644
--- a/js/src/vm/TypeInference.cpp
+++ b/js/src/vm/TypeInference.cpp
@@ -2509,7 +2509,7 @@ TemporaryTypeSet::propertyNeedsBarrier(CompilerConstraintList* constraints, jsid
bool
js::ClassCanHaveExtraProperties(const Class* clasp)
{
- if (clasp == &UnboxedPlainObject::class_)
+ if (clasp == &UnboxedPlainObject::class_ || clasp == &UnboxedArrayObject::class_)
return false;
return clasp->getResolve()
|| clasp->getOpsLookupProperty()
@@ -3400,7 +3400,7 @@ JSFunction::setTypeForScriptedFunction(ExclusiveContext* cx, HandleFunction fun,
/////////////////////////////////////////////////////////////////////
void
-PreliminaryObjectArray::registerNewObject(PlainObject* res)
+PreliminaryObjectArray::registerNewObject(JSObject* res)
{
// The preliminary object pointers are weak, and won't be swept properly
// during nursery collections, so the preliminary objects need to be
@@ -3418,7 +3418,7 @@ PreliminaryObjectArray::registerNewObject(PlainObject* res)
}
void
-PreliminaryObjectArray::unregisterObject(PlainObject* obj)
+PreliminaryObjectArray::unregisterObject(JSObject* obj)
{
for (size_t i = 0; i < COUNT; i++) {
if (objects[i] == obj) {
diff --git a/js/src/vm/TypeInference.h b/js/src/vm/TypeInference.h
index fd021fc96..537baa21f 100644
--- a/js/src/vm/TypeInference.h
+++ b/js/src/vm/TypeInference.h
@@ -871,8 +871,8 @@ class PreliminaryObjectArray
public:
PreliminaryObjectArray() = default;
- void registerNewObject(PlainObject* res);
- void unregisterObject(PlainObject* obj);
+ void registerNewObject(JSObject* res);
+ void unregisterObject(JSObject* obj);
JSObject* get(size_t i) const {
MOZ_ASSERT(i < COUNT);
diff --git a/js/src/vm/UnboxedObject-inl.h b/js/src/vm/UnboxedObject-inl.h
index c1468a5b1..93ad7bf28 100644
--- a/js/src/vm/UnboxedObject-inl.h
+++ b/js/src/vm/UnboxedObject-inl.h
@@ -172,6 +172,669 @@ UnboxedPlainObject::layout() const
return group()->unboxedLayout();
}
+/////////////////////////////////////////////////////////////////////
+// UnboxedArrayObject
+/////////////////////////////////////////////////////////////////////
+
+inline const UnboxedLayout&
+UnboxedArrayObject::layout() const
+{
+ return group()->unboxedLayout();
+}
+
+inline void
+UnboxedArrayObject::setLength(ExclusiveContext* cx, uint32_t length)
+{
+ if (length > INT32_MAX) {
+ // Track objects with overflowing lengths in type information.
+ MarkObjectGroupFlags(cx, this, OBJECT_FLAG_LENGTH_OVERFLOW);
+ }
+
+ length_ = length;
+}
+
+inline void
+UnboxedArrayObject::setInitializedLength(uint32_t initlen)
+{
+ if (initlen < initializedLength()) {
+ switch (elementType()) {
+ case JSVAL_TYPE_STRING:
+ for (size_t i = initlen; i < initializedLength(); i++)
+ triggerPreBarrier<JSVAL_TYPE_STRING>(i);
+ break;
+ case JSVAL_TYPE_OBJECT:
+ for (size_t i = initlen; i < initializedLength(); i++)
+ triggerPreBarrier<JSVAL_TYPE_OBJECT>(i);
+ break;
+ default:
+ MOZ_ASSERT(!UnboxedTypeNeedsPreBarrier(elementType()));
+ }
+ }
+ setInitializedLengthNoBarrier(initlen);
+}
+
+template <JSValueType Type>
+inline bool
+UnboxedArrayObject::setElementSpecific(ExclusiveContext* cx, size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ MOZ_ASSERT(Type == elementType());
+ uint8_t* p = elements() + index * UnboxedTypeSize(Type);
+ return SetUnboxedValue(cx, this, JSID_VOID, p, elementType(), v, /* preBarrier = */ true);
+}
+
+template <JSValueType Type>
+inline void
+UnboxedArrayObject::setElementNoTypeChangeSpecific(size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ MOZ_ASSERT(Type == elementType());
+ uint8_t* p = elements() + index * UnboxedTypeSize(Type);
+ return SetUnboxedValueNoTypeChange(this, p, elementType(), v, /* preBarrier = */ true);
+}
+
+template <JSValueType Type>
+inline bool
+UnboxedArrayObject::initElementSpecific(ExclusiveContext* cx, size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ MOZ_ASSERT(Type == elementType());
+ uint8_t* p = elements() + index * UnboxedTypeSize(Type);
+ return SetUnboxedValue(cx, this, JSID_VOID, p, elementType(), v, /* preBarrier = */ false);
+}
+
+template <JSValueType Type>
+inline void
+UnboxedArrayObject::initElementNoTypeChangeSpecific(size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ MOZ_ASSERT(Type == elementType());
+ uint8_t* p = elements() + index * UnboxedTypeSize(Type);
+ return SetUnboxedValueNoTypeChange(this, p, elementType(), v, /* preBarrier = */ false);
+}
+
+template <JSValueType Type>
+inline Value
+UnboxedArrayObject::getElementSpecific(size_t index)
+{
+ MOZ_ASSERT(index < initializedLength());
+ MOZ_ASSERT(Type == elementType());
+ uint8_t* p = elements() + index * UnboxedTypeSize(Type);
+ return GetUnboxedValue(p, Type, /* maybeUninitialized = */ false);
+}
+
+template <JSValueType Type>
+inline void
+UnboxedArrayObject::triggerPreBarrier(size_t index)
+{
+ MOZ_ASSERT(UnboxedTypeNeedsPreBarrier(Type));
+
+ uint8_t* p = elements() + index * UnboxedTypeSize(Type);
+
+ switch (Type) {
+ case JSVAL_TYPE_STRING: {
+ JSString** np = reinterpret_cast<JSString**>(p);
+ JSString::writeBarrierPre(*np);
+ break;
+ }
+
+ case JSVAL_TYPE_OBJECT: {
+ JSObject** np = reinterpret_cast<JSObject**>(p);
+ JSObject::writeBarrierPre(*np);
+ break;
+ }
+
+ default:
+ MOZ_CRASH("Bad type");
+ }
+}
+
+/////////////////////////////////////////////////////////////////////
+// Combined methods for NativeObject and UnboxedArrayObject accesses.
+/////////////////////////////////////////////////////////////////////
+
+static inline bool
+HasAnyBoxedOrUnboxedDenseElements(JSObject* obj)
+{
+ return obj->isNative() || obj->is<UnboxedArrayObject>();
+}
+
+static inline size_t
+GetAnyBoxedOrUnboxedInitializedLength(JSObject* obj)
+{
+ if (obj->isNative())
+ return obj->as<NativeObject>().getDenseInitializedLength();
+ if (obj->is<UnboxedArrayObject>())
+ return obj->as<UnboxedArrayObject>().initializedLength();
+ return 0;
+}
+
+static inline size_t
+GetAnyBoxedOrUnboxedCapacity(JSObject* obj)
+{
+ if (obj->isNative())
+ return obj->as<NativeObject>().getDenseCapacity();
+ if (obj->is<UnboxedArrayObject>())
+ return obj->as<UnboxedArrayObject>().capacity();
+ return 0;
+}
+
+static inline Value
+GetAnyBoxedOrUnboxedDenseElement(JSObject* obj, size_t index)
+{
+ if (obj->isNative())
+ return obj->as<NativeObject>().getDenseElement(index);
+ return obj->as<UnboxedArrayObject>().getElement(index);
+}
+
+static inline size_t
+GetAnyBoxedOrUnboxedArrayLength(JSObject* obj)
+{
+ if (obj->is<ArrayObject>())
+ return obj->as<ArrayObject>().length();
+ return obj->as<UnboxedArrayObject>().length();
+}
+
+static inline void
+SetAnyBoxedOrUnboxedArrayLength(JSContext* cx, JSObject* obj, size_t length)
+{
+ if (obj->is<ArrayObject>()) {
+ MOZ_ASSERT(length >= obj->as<ArrayObject>().length());
+ obj->as<ArrayObject>().setLength(cx, length);
+ } else {
+ MOZ_ASSERT(length >= obj->as<UnboxedArrayObject>().length());
+ obj->as<UnboxedArrayObject>().setLength(cx, length);
+ }
+}
+
+static inline bool
+SetAnyBoxedOrUnboxedDenseElement(JSContext* cx, JSObject* obj, size_t index, const Value& value)
+{
+ if (obj->isNative()) {
+ obj->as<NativeObject>().setDenseElementWithType(cx, index, value);
+ return true;
+ }
+ return obj->as<UnboxedArrayObject>().setElement(cx, index, value);
+}
+
+static inline bool
+InitAnyBoxedOrUnboxedDenseElement(JSContext* cx, JSObject* obj, size_t index, const Value& value)
+{
+ if (obj->isNative()) {
+ obj->as<NativeObject>().initDenseElementWithType(cx, index, value);
+ return true;
+ }
+ return obj->as<UnboxedArrayObject>().initElement(cx, index, value);
+}
+
+/////////////////////////////////////////////////////////////////////
+// Template methods for NativeObject and UnboxedArrayObject accesses.
+/////////////////////////////////////////////////////////////////////
+
+static inline JSValueType
+GetBoxedOrUnboxedType(JSObject* obj)
+{
+ if (obj->isNative())
+ return JSVAL_TYPE_MAGIC;
+ return obj->as<UnboxedArrayObject>().elementType();
+}
+
+template <JSValueType Type>
+static inline bool
+HasBoxedOrUnboxedDenseElements(JSObject* obj)
+{
+ if (Type == JSVAL_TYPE_MAGIC)
+ return obj->isNative();
+ return obj->is<UnboxedArrayObject>() && obj->as<UnboxedArrayObject>().elementType() == Type;
+}
+
+template <JSValueType Type>
+static inline size_t
+GetBoxedOrUnboxedInitializedLength(JSObject* obj)
+{
+ if (Type == JSVAL_TYPE_MAGIC)
+ return obj->as<NativeObject>().getDenseInitializedLength();
+ return obj->as<UnboxedArrayObject>().initializedLength();
+}
+
+template <JSValueType Type>
+static inline DenseElementResult
+SetBoxedOrUnboxedInitializedLength(JSContext* cx, JSObject* obj, size_t initlen)
+{
+ size_t oldInitlen = GetBoxedOrUnboxedInitializedLength<Type>(obj);
+ if (Type == JSVAL_TYPE_MAGIC) {
+ obj->as<NativeObject>().setDenseInitializedLength(initlen);
+ if (initlen < oldInitlen)
+ obj->as<NativeObject>().shrinkElements(cx, initlen);
+ } else {
+ obj->as<UnboxedArrayObject>().setInitializedLength(initlen);
+ if (initlen < oldInitlen)
+ obj->as<UnboxedArrayObject>().shrinkElements(cx, initlen);
+ }
+ return DenseElementResult::Success;
+}
+
+template <JSValueType Type>
+static inline size_t
+GetBoxedOrUnboxedCapacity(JSObject* obj)
+{
+ if (Type == JSVAL_TYPE_MAGIC)
+ return obj->as<NativeObject>().getDenseCapacity();
+ return obj->as<UnboxedArrayObject>().capacity();
+}
+
+template <JSValueType Type>
+static inline Value
+GetBoxedOrUnboxedDenseElement(JSObject* obj, size_t index)
+{
+ if (Type == JSVAL_TYPE_MAGIC)
+ return obj->as<NativeObject>().getDenseElement(index);
+ return obj->as<UnboxedArrayObject>().getElementSpecific<Type>(index);
+}
+
+template <JSValueType Type>
+static inline void
+SetBoxedOrUnboxedDenseElementNoTypeChange(JSObject* obj, size_t index, const Value& value)
+{
+ if (Type == JSVAL_TYPE_MAGIC)
+ obj->as<NativeObject>().setDenseElement(index, value);
+ else
+ obj->as<UnboxedArrayObject>().setElementNoTypeChangeSpecific<Type>(index, value);
+}
+
+template <JSValueType Type>
+static inline bool
+SetBoxedOrUnboxedDenseElement(JSContext* cx, JSObject* obj, size_t index, const Value& value)
+{
+ if (Type == JSVAL_TYPE_MAGIC) {
+ obj->as<NativeObject>().setDenseElementWithType(cx, index, value);
+ return true;
+ }
+ return obj->as<UnboxedArrayObject>().setElementSpecific<Type>(cx, index, value);
+}
+
+template <JSValueType Type>
+static inline DenseElementResult
+EnsureBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* obj, size_t count)
+{
+ if (Type == JSVAL_TYPE_MAGIC) {
+ if (!obj->as<ArrayObject>().ensureElements(cx, count))
+ return DenseElementResult::Failure;
+ } else {
+ if (obj->as<UnboxedArrayObject>().capacity() < count) {
+ if (!obj->as<UnboxedArrayObject>().growElements(cx, count))
+ return DenseElementResult::Failure;
+ }
+ }
+ return DenseElementResult::Success;
+}
+
+template <JSValueType Type>
+static inline DenseElementResult
+SetOrExtendBoxedOrUnboxedDenseElements(ExclusiveContext* cx, JSObject* obj,
+ uint32_t start, const Value* vp, uint32_t count,
+ ShouldUpdateTypes updateTypes = ShouldUpdateTypes::Update)
+{
+ if (Type == JSVAL_TYPE_MAGIC) {
+ NativeObject* nobj = &obj->as<NativeObject>();
+
+ if (nobj->denseElementsAreFrozen())
+ return DenseElementResult::Incomplete;
+
+ if (obj->is<ArrayObject>() &&
+ !obj->as<ArrayObject>().lengthIsWritable() &&
+ start + count >= obj->as<ArrayObject>().length())
+ {
+ return DenseElementResult::Incomplete;
+ }
+
+ DenseElementResult result = nobj->ensureDenseElements(cx, start, count);
+ if (result != DenseElementResult::Success)
+ return result;
+
+ if (obj->is<ArrayObject>() && start + count >= obj->as<ArrayObject>().length())
+ obj->as<ArrayObject>().setLengthInt32(start + count);
+
+ if (updateTypes == ShouldUpdateTypes::DontUpdate && !nobj->shouldConvertDoubleElements()) {
+ nobj->copyDenseElements(start, vp, count);
+ } else {
+ for (size_t i = 0; i < count; i++)
+ nobj->setDenseElementWithType(cx, start + i, vp[i]);
+ }
+
+ return DenseElementResult::Success;
+ }
+
+ UnboxedArrayObject* nobj = &obj->as<UnboxedArrayObject>();
+
+ if (start > nobj->initializedLength())
+ return DenseElementResult::Incomplete;
+
+ if (start + count >= UnboxedArrayObject::MaximumCapacity)
+ return DenseElementResult::Incomplete;
+
+ if (start + count > nobj->capacity() && !nobj->growElements(cx, start + count))
+ return DenseElementResult::Failure;
+
+ size_t oldInitlen = nobj->initializedLength();
+
+ // Overwrite any existing elements covered by the new range. If we fail
+ // after this point due to some incompatible type being written to the
+ // object's elements, afterwards the contents will be different from when
+ // we started. The caller must retry the operation using a generic path,
+ // which will overwrite the already-modified elements as well as the ones
+ // that were left alone.
+ size_t i = 0;
+ if (updateTypes == ShouldUpdateTypes::DontUpdate) {
+ for (size_t j = start; i < count && j < oldInitlen; i++, j++)
+ nobj->setElementNoTypeChangeSpecific<Type>(j, vp[i]);
+ } else {
+ for (size_t j = start; i < count && j < oldInitlen; i++, j++) {
+ if (!nobj->setElementSpecific<Type>(cx, j, vp[i]))
+ return DenseElementResult::Incomplete;
+ }
+ }
+
+ if (i != count) {
+ obj->as<UnboxedArrayObject>().setInitializedLength(start + count);
+ if (updateTypes == ShouldUpdateTypes::DontUpdate) {
+ for (; i < count; i++)
+ nobj->initElementNoTypeChangeSpecific<Type>(start + i, vp[i]);
+ } else {
+ for (; i < count; i++) {
+ if (!nobj->initElementSpecific<Type>(cx, start + i, vp[i])) {
+ nobj->setInitializedLengthNoBarrier(oldInitlen);
+ return DenseElementResult::Incomplete;
+ }
+ }
+ }
+ }
+
+ if (start + count >= nobj->length())
+ nobj->setLength(cx, start + count);
+
+ return DenseElementResult::Success;
+}
+
+template <JSValueType Type>
+static inline DenseElementResult
+MoveBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* obj, uint32_t dstStart, uint32_t srcStart,
+ uint32_t length)
+{
+ MOZ_ASSERT(HasBoxedOrUnboxedDenseElements<Type>(obj));
+
+ if (Type == JSVAL_TYPE_MAGIC) {
+ if (obj->as<NativeObject>().denseElementsAreFrozen())
+ return DenseElementResult::Incomplete;
+
+ if (!obj->as<NativeObject>().maybeCopyElementsForWrite(cx))
+ return DenseElementResult::Failure;
+ obj->as<NativeObject>().moveDenseElements(dstStart, srcStart, length);
+ } else {
+ uint8_t* data = obj->as<UnboxedArrayObject>().elements();
+ size_t elementSize = UnboxedTypeSize(Type);
+
+ if (UnboxedTypeNeedsPreBarrier(Type) &&
+ JS::shadow::Zone::asShadowZone(obj->zone())->needsIncrementalBarrier())
+ {
+ // Trigger pre barriers on any elements we are overwriting. See
+ // NativeObject::moveDenseElements. No post barrier is needed as
+ // only whole cell post barriers are used with unboxed objects.
+ for (size_t i = 0; i < length; i++)
+ obj->as<UnboxedArrayObject>().triggerPreBarrier<Type>(dstStart + i);
+ }
+
+ memmove(data + dstStart * elementSize,
+ data + srcStart * elementSize,
+ length * elementSize);
+ }
+
+ return DenseElementResult::Success;
+}
+
+template <JSValueType DstType, JSValueType SrcType>
+static inline DenseElementResult
+CopyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* dst, JSObject* src,
+ uint32_t dstStart, uint32_t srcStart, uint32_t length)
+{
+ MOZ_ASSERT(HasBoxedOrUnboxedDenseElements<SrcType>(src));
+ MOZ_ASSERT(HasBoxedOrUnboxedDenseElements<DstType>(dst));
+ MOZ_ASSERT(GetBoxedOrUnboxedInitializedLength<DstType>(dst) == dstStart);
+ MOZ_ASSERT(GetBoxedOrUnboxedInitializedLength<SrcType>(src) >= srcStart + length);
+ MOZ_ASSERT(GetBoxedOrUnboxedCapacity<DstType>(dst) >= dstStart + length);
+
+ SetBoxedOrUnboxedInitializedLength<DstType>(cx, dst, dstStart + length);
+
+ if (DstType == JSVAL_TYPE_MAGIC) {
+ if (SrcType == JSVAL_TYPE_MAGIC) {
+ const Value* vp = src->as<NativeObject>().getDenseElements() + srcStart;
+ dst->as<NativeObject>().initDenseElements(dstStart, vp, length);
+ } else {
+ for (size_t i = 0; i < length; i++) {
+ Value v = GetBoxedOrUnboxedDenseElement<SrcType>(src, srcStart + i);
+ dst->as<NativeObject>().initDenseElement(dstStart + i, v);
+ }
+ }
+ } else if (DstType == SrcType) {
+ uint8_t* dstData = dst->as<UnboxedArrayObject>().elements();
+ uint8_t* srcData = src->as<UnboxedArrayObject>().elements();
+ size_t elementSize = UnboxedTypeSize(DstType);
+
+ memcpy(dstData + dstStart * elementSize,
+ srcData + srcStart * elementSize,
+ length * elementSize);
+
+ // Add a store buffer entry if we might have copied a nursery pointer to dst.
+ if (UnboxedTypeNeedsPostBarrier(DstType) && !IsInsideNursery(dst))
+ dst->runtimeFromMainThread()->gc.storeBuffer.putWholeCell(dst);
+ } else if (DstType == JSVAL_TYPE_DOUBLE && SrcType == JSVAL_TYPE_INT32) {
+ uint8_t* dstData = dst->as<UnboxedArrayObject>().elements();
+ uint8_t* srcData = src->as<UnboxedArrayObject>().elements();
+
+ for (size_t i = 0; i < length; i++) {
+ int32_t v = *reinterpret_cast<int32_t*>(srcData + (srcStart + i) * sizeof(int32_t));
+ *reinterpret_cast<double*>(dstData + (dstStart + i) * sizeof(double)) = v;
+ }
+ } else {
+ for (size_t i = 0; i < length; i++) {
+ Value v = GetBoxedOrUnboxedDenseElement<SrcType>(src, srcStart + i);
+ dst->as<UnboxedArrayObject>().initElementNoTypeChangeSpecific<DstType>(dstStart + i, v);
+ }
+ }
+
+ return DenseElementResult::Success;
+}
+
+/////////////////////////////////////////////////////////////////////
+// Dispatch to specialized methods based on the type of an object.
+/////////////////////////////////////////////////////////////////////
+
+// Goop to fix MSVC. See DispatchTraceKindTyped in TraceKind.h.
+// The clang-cl front end defines _MSC_VER, but still requires the explicit
+// template declaration, so we must test for __clang__ here as well.
+#if defined(_MSC_VER) && !defined(__clang__)
+# define DEPENDENT_TEMPLATE_HINT
+#else
+# define DEPENDENT_TEMPLATE_HINT template
+#endif
+
+// Function to dispatch a method specialized to whatever boxed or unboxed dense
+// elements which an input object has.
+template <typename F>
+DenseElementResult
+CallBoxedOrUnboxedSpecialization(F f, JSObject* obj)
+{
+ if (!HasAnyBoxedOrUnboxedDenseElements(obj))
+ return DenseElementResult::Incomplete;
+ switch (GetBoxedOrUnboxedType(obj)) {
+ case JSVAL_TYPE_MAGIC:
+ return f. DEPENDENT_TEMPLATE_HINT operator()<JSVAL_TYPE_MAGIC>();
+ case JSVAL_TYPE_BOOLEAN:
+ return f. DEPENDENT_TEMPLATE_HINT operator()<JSVAL_TYPE_BOOLEAN>();
+ case JSVAL_TYPE_INT32:
+ return f. DEPENDENT_TEMPLATE_HINT operator()<JSVAL_TYPE_INT32>();
+ case JSVAL_TYPE_DOUBLE:
+ return f. DEPENDENT_TEMPLATE_HINT operator()<JSVAL_TYPE_DOUBLE>();
+ case JSVAL_TYPE_STRING:
+ return f. DEPENDENT_TEMPLATE_HINT operator()<JSVAL_TYPE_STRING>();
+ case JSVAL_TYPE_OBJECT:
+ return f. DEPENDENT_TEMPLATE_HINT operator()<JSVAL_TYPE_OBJECT>();
+ default:
+ MOZ_CRASH();
+ }
+}
+
+// As above, except the specialization can reflect the unboxed type of two objects.
+template <typename F>
+DenseElementResult
+CallBoxedOrUnboxedSpecialization(F f, JSObject* obj1, JSObject* obj2)
+{
+ if (!HasAnyBoxedOrUnboxedDenseElements(obj1) || !HasAnyBoxedOrUnboxedDenseElements(obj2))
+ return DenseElementResult::Incomplete;
+
+#define SPECIALIZE_OBJ2(TYPE) \
+ switch (GetBoxedOrUnboxedType(obj2)) { \
+ case JSVAL_TYPE_MAGIC: \
+ return f. DEPENDENT_TEMPLATE_HINT operator()<TYPE, JSVAL_TYPE_MAGIC>(); \
+ case JSVAL_TYPE_BOOLEAN: \
+ return f. DEPENDENT_TEMPLATE_HINT operator()<TYPE, JSVAL_TYPE_BOOLEAN>(); \
+ case JSVAL_TYPE_INT32: \
+ return f. DEPENDENT_TEMPLATE_HINT operator()<TYPE, JSVAL_TYPE_INT32>(); \
+ case JSVAL_TYPE_DOUBLE: \
+ return f. DEPENDENT_TEMPLATE_HINT operator()<TYPE, JSVAL_TYPE_DOUBLE>(); \
+ case JSVAL_TYPE_STRING: \
+ return f. DEPENDENT_TEMPLATE_HINT operator()<TYPE, JSVAL_TYPE_STRING>(); \
+ case JSVAL_TYPE_OBJECT: \
+ return f. DEPENDENT_TEMPLATE_HINT operator()<TYPE, JSVAL_TYPE_OBJECT>(); \
+ default: \
+ MOZ_CRASH(); \
+ }
+
+ switch (GetBoxedOrUnboxedType(obj1)) {
+ case JSVAL_TYPE_MAGIC:
+ SPECIALIZE_OBJ2(JSVAL_TYPE_MAGIC)
+ case JSVAL_TYPE_BOOLEAN:
+ SPECIALIZE_OBJ2(JSVAL_TYPE_BOOLEAN)
+ case JSVAL_TYPE_INT32:
+ SPECIALIZE_OBJ2(JSVAL_TYPE_INT32)
+ case JSVAL_TYPE_DOUBLE:
+ SPECIALIZE_OBJ2(JSVAL_TYPE_DOUBLE)
+ case JSVAL_TYPE_STRING:
+ SPECIALIZE_OBJ2(JSVAL_TYPE_STRING)
+ case JSVAL_TYPE_OBJECT:
+ SPECIALIZE_OBJ2(JSVAL_TYPE_OBJECT)
+ default:
+ MOZ_CRASH();
+ }
+
+#undef SPECIALIZE_OBJ2
+}
+
+#undef DEPENDENT_TEMPLATE_HINT
+
+#define DefineBoxedOrUnboxedFunctor1(Signature, A) \
+struct Signature ## Functor { \
+ A a; \
+ explicit Signature ## Functor(A a) \
+ : a(a) \
+ {} \
+ template <JSValueType Type> \
+ DenseElementResult operator()() { \
+ return Signature<Type>(a); \
+ } \
+}
+
+#define DefineBoxedOrUnboxedFunctor3(Signature, A, B, C) \
+struct Signature ## Functor { \
+ A a; B b; C c; \
+ Signature ## Functor(A a, B b, C c) \
+ : a(a), b(b), c(c) \
+ {} \
+ template <JSValueType Type> \
+ DenseElementResult operator()() { \
+ return Signature<Type>(a, b, c); \
+ } \
+}
+
+#define DefineBoxedOrUnboxedFunctor4(Signature, A, B, C, D) \
+struct Signature ## Functor { \
+ A a; B b; C c; D d; \
+ Signature ## Functor(A a, B b, C c, D d) \
+ : a(a), b(b), c(c), d(d) \
+ {} \
+ template <JSValueType Type> \
+ DenseElementResult operator()() { \
+ return Signature<Type>(a, b, c, d); \
+ } \
+}
+
+#define DefineBoxedOrUnboxedFunctorPair4(Signature, A, B, C, D) \
+struct Signature ## Functor { \
+ A a; B b; C c; D d; \
+ Signature ## Functor(A a, B b, C c, D d) \
+ : a(a), b(b), c(c), d(d) \
+ {} \
+ template <JSValueType TypeOne, JSValueType TypeTwo> \
+ DenseElementResult operator()() { \
+ return Signature<TypeOne, TypeTwo>(a, b, c, d); \
+ } \
+}
+
+#define DefineBoxedOrUnboxedFunctor5(Signature, A, B, C, D, E) \
+struct Signature ## Functor { \
+ A a; B b; C c; D d; E e; \
+ Signature ## Functor(A a, B b, C c, D d, E e) \
+ : a(a), b(b), c(c), d(d), e(e) \
+ {} \
+ template <JSValueType Type> \
+ DenseElementResult operator()() { \
+ return Signature<Type>(a, b, c, d, e); \
+ } \
+}
+
+#define DefineBoxedOrUnboxedFunctor6(Signature, A, B, C, D, E, F) \
+struct Signature ## Functor { \
+ A a; B b; C c; D d; E e; F f; \
+ Signature ## Functor(A a, B b, C c, D d, E e, F f) \
+ : a(a), b(b), c(c), d(d), e(e), f(f) \
+ {} \
+ template <JSValueType Type> \
+ DenseElementResult operator()() { \
+ return Signature<Type>(a, b, c, d, e, f); \
+ } \
+}
+
+#define DefineBoxedOrUnboxedFunctorPair6(Signature, A, B, C, D, E, F) \
+struct Signature ## Functor { \
+ A a; B b; C c; D d; E e; F f; \
+ Signature ## Functor(A a, B b, C c, D d, E e, F f) \
+ : a(a), b(b), c(c), d(d), e(e), f(f) \
+ {} \
+ template <JSValueType TypeOne, JSValueType TypeTwo> \
+ DenseElementResult operator()() { \
+ return Signature<TypeOne, TypeTwo>(a, b, c, d, e, f); \
+ } \
+}
+
+DenseElementResult
+SetOrExtendAnyBoxedOrUnboxedDenseElements(ExclusiveContext* cx, JSObject* obj,
+ uint32_t start, const Value* vp, uint32_t count,
+ ShouldUpdateTypes updateTypes = ShouldUpdateTypes::Update);
+
+DenseElementResult
+MoveAnyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* obj,
+ uint32_t dstStart, uint32_t srcStart, uint32_t length);
+
+DenseElementResult
+CopyAnyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* dst, JSObject* src,
+ uint32_t dstStart, uint32_t srcStart, uint32_t length);
+
+void
+SetAnyBoxedOrUnboxedInitializedLength(JSContext* cx, JSObject* obj, size_t initlen);
+
+DenseElementResult
+EnsureAnyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* obj, size_t count);
+
} // namespace js
#endif // vm_UnboxedObject_inl_h
diff --git a/js/src/vm/UnboxedObject.cpp b/js/src/vm/UnboxedObject.cpp
index 2e017ca3b..059293a2d 100644
--- a/js/src/vm/UnboxedObject.cpp
+++ b/js/src/vm/UnboxedObject.cpp
@@ -417,6 +417,8 @@ UnboxedLayout::makeNativeGroup(JSContext* cx, ObjectGroup* group)
RootedObjectGroup replacementGroup(cx);
+ const Class* clasp = layout.isArray() ? &ArrayObject::class_ : &PlainObject::class_;
+
// Immediately clear any new script on the group. This is done by replacing
// the existing new script with one for a replacement default new group.
// This is done so that the size of the replacment group's objects is the
@@ -424,6 +426,8 @@ UnboxedLayout::makeNativeGroup(JSContext* cx, ObjectGroup* group)
// slot accesses later on for sites that see converted objects from this
// group and objects that were allocated using the replacement new group.
if (layout.newScript()) {
+ MOZ_ASSERT(!layout.isArray());
+
replacementGroup = ObjectGroupCompartment::makeGroup(cx, &PlainObject::class_, proto);
if (!replacementGroup)
return false;
@@ -449,14 +453,15 @@ UnboxedLayout::makeNativeGroup(JSContext* cx, ObjectGroup* group)
RootedScript script(cx, layout.allocationScript());
jsbytecode* pc = layout.allocationPc();
- replacementGroup = ObjectGroupCompartment::makeGroup(cx, &PlainObject::class_, proto);
+ replacementGroup = ObjectGroupCompartment::makeGroup(cx, clasp, proto);
if (!replacementGroup)
return false;
PlainObject* templateObject = &script->getObject(pc)->as<PlainObject>();
replacementGroup->addDefiniteProperties(cx, templateObject->lastProperty());
- cx->compartment()->objectGroups.replaceAllocationSiteGroup(script, pc, JSProto_Object,
+ JSProtoKey key = layout.isArray() ? JSProto_Array : JSProto_Object;
+ cx->compartment()->objectGroups.replaceAllocationSiteGroup(script, pc, key,
replacementGroup);
// Clear any baseline information at this opcode which might use the old group.
@@ -472,12 +477,22 @@ UnboxedLayout::makeNativeGroup(JSContext* cx, ObjectGroup* group)
}
}
- size_t nfixed = gc::GetGCKindSlots(layout.getAllocKind());
+ size_t nfixed = layout.isArray() ? 0 : gc::GetGCKindSlots(layout.getAllocKind());
+
+ if (layout.isArray()) {
+ // The length shape to use for arrays is cached via a modified initial
+ // shape for array objects. Create an array now to make sure this entry
+ // is instantiated.
+ if (!NewDenseEmptyArray(cx))
+ return false;
+ }
- RootedShape shape(cx, EmptyShape::getInitialShape(cx, &PlainObject::class_, proto, nfixed, 0));
+ RootedShape shape(cx, EmptyShape::getInitialShape(cx, clasp, proto, nfixed, 0));
if (!shape)
return false;
+ MOZ_ASSERT_IF(layout.isArray(), !shape->isEmptyShape() && shape->slotSpan() == 0);
+
// Add shapes for each property, if this is for a plain object.
for (size_t i = 0; i < layout.properties().length(); i++) {
const UnboxedLayout::Property& property = layout.properties()[i];
@@ -490,7 +505,7 @@ UnboxedLayout::makeNativeGroup(JSContext* cx, ObjectGroup* group)
}
ObjectGroup* nativeGroup =
- ObjectGroupCompartment::makeGroup(cx, &PlainObject::class_, proto,
+ ObjectGroupCompartment::makeGroup(cx, clasp, proto,
group->flags() & OBJECT_FLAG_DYNAMIC_MASK);
if (!nativeGroup)
return false;
@@ -498,19 +513,24 @@ UnboxedLayout::makeNativeGroup(JSContext* cx, ObjectGroup* group)
// No sense propagating if we don't know what we started with.
if (!group->unknownProperties()) {
// Propagate all property types from the old group to the new group.
- for (size_t i = 0; i < layout.properties().length(); i++) {
- const UnboxedLayout::Property& property = layout.properties()[i];
- jsid id = NameToId(property.name);
- if (!PropagatePropertyTypes(cx, id, group, nativeGroup))
+ if (layout.isArray()) {
+ if (!PropagatePropertyTypes(cx, JSID_VOID, group, nativeGroup))
return false;
+ } else {
+ for (size_t i = 0; i < layout.properties().length(); i++) {
+ const UnboxedLayout::Property& property = layout.properties()[i];
+ jsid id = NameToId(property.name);
+ if (!PropagatePropertyTypes(cx, id, group, nativeGroup))
+ return false;
- // If we are OOM we may not be able to propagate properties.
- if (nativeGroup->unknownProperties())
- break;
+ // If we are OOM we may not be able to propagate properties.
+ if (nativeGroup->unknownProperties())
+ break;
- HeapTypeSet* nativeProperty = nativeGroup->maybeGetProperty(id);
- if (nativeProperty && nativeProperty->canSetDefinite(i))
- nativeProperty->setDefinite(i);
+ HeapTypeSet* nativeProperty = nativeGroup->maybeGetProperty(id);
+ if (nativeProperty && nativeProperty->canSetDefinite(i))
+ nativeProperty->setDefinite(i);
+ }
}
} else {
// If we skip, though, the new group had better agree.
@@ -926,6 +946,692 @@ const Class UnboxedPlainObject::class_ = {
};
/////////////////////////////////////////////////////////////////////
+// UnboxedArrayObject
+/////////////////////////////////////////////////////////////////////
+
+template <JSValueType Type>
+DenseElementResult
+AppendUnboxedDenseElements(UnboxedArrayObject* obj, uint32_t initlen,
+ MutableHandle<GCVector<Value>> values)
+{
+ for (size_t i = 0; i < initlen; i++)
+ values.infallibleAppend(obj->getElementSpecific<Type>(i));
+ return DenseElementResult::Success;
+}
+
+DefineBoxedOrUnboxedFunctor3(AppendUnboxedDenseElements,
+ UnboxedArrayObject*, uint32_t, MutableHandle<GCVector<Value>>);
+
+/* static */ bool
+UnboxedArrayObject::convertToNativeWithGroup(ExclusiveContext* cx, JSObject* obj,
+ ObjectGroup* group, Shape* shape)
+{
+ size_t length = obj->as<UnboxedArrayObject>().length();
+ size_t initlen = obj->as<UnboxedArrayObject>().initializedLength();
+
+ Rooted<GCVector<Value>> values(cx, GCVector<Value>(cx));
+ if (!values.reserve(initlen))
+ return false;
+
+ AppendUnboxedDenseElementsFunctor functor(&obj->as<UnboxedArrayObject>(), initlen, &values);
+ DebugOnly<DenseElementResult> result = CallBoxedOrUnboxedSpecialization(functor, obj);
+ MOZ_ASSERT(result.value == DenseElementResult::Success);
+
+ obj->setGroup(group);
+
+ ArrayObject* aobj = &obj->as<ArrayObject>();
+ aobj->setLastPropertyMakeNative(cx, shape);
+
+ // Make sure there is at least one element, so that this array does not
+ // use emptyObjectElements / emptyObjectElementsShared.
+ if (!aobj->ensureElements(cx, Max<size_t>(initlen, 1)))
+ return false;
+
+ MOZ_ASSERT(!aobj->getDenseInitializedLength());
+ aobj->setDenseInitializedLength(initlen);
+ aobj->initDenseElements(0, values.begin(), initlen);
+ aobj->setLengthInt32(length);
+
+ return true;
+}
+
+/* static */ bool
+UnboxedArrayObject::convertToNative(JSContext* cx, JSObject* obj)
+{
+ const UnboxedLayout& layout = obj->as<UnboxedArrayObject>().layout();
+
+ if (!layout.nativeGroup()) {
+ if (!UnboxedLayout::makeNativeGroup(cx, obj->group()))
+ return false;
+ }
+
+ return convertToNativeWithGroup(cx, obj, layout.nativeGroup(), layout.nativeShape());
+}
+
+bool
+UnboxedArrayObject::convertInt32ToDouble(ExclusiveContext* cx, ObjectGroup* group)
+{
+ MOZ_ASSERT(elementType() == JSVAL_TYPE_INT32);
+ MOZ_ASSERT(group->unboxedLayout().elementType() == JSVAL_TYPE_DOUBLE);
+
+ Vector<int32_t> values(cx);
+ if (!values.reserve(initializedLength()))
+ return false;
+ for (size_t i = 0; i < initializedLength(); i++)
+ values.infallibleAppend(getElementSpecific<JSVAL_TYPE_INT32>(i).toInt32());
+
+ uint8_t* newElements;
+ if (hasInlineElements()) {
+ newElements = AllocateObjectBuffer<uint8_t>(cx, this, capacity() * sizeof(double));
+ } else {
+ newElements = ReallocateObjectBuffer<uint8_t>(cx, this, elements(),
+ capacity() * sizeof(int32_t),
+ capacity() * sizeof(double));
+ }
+ if (!newElements)
+ return false;
+
+ setGroup(group);
+ elements_ = newElements;
+
+ for (size_t i = 0; i < initializedLength(); i++)
+ setElementNoTypeChangeSpecific<JSVAL_TYPE_DOUBLE>(i, DoubleValue(values[i]));
+
+ return true;
+}
+
+/* static */ UnboxedArrayObject*
+UnboxedArrayObject::create(ExclusiveContext* cx, HandleObjectGroup group, uint32_t length,
+ NewObjectKind newKind, uint32_t maxLength)
+{
+ MOZ_ASSERT(length <= MaximumCapacity);
+
+ MOZ_ASSERT(group->clasp() == &class_);
+ uint32_t elementSize = UnboxedTypeSize(group->unboxedLayout().elementType());
+ uint32_t capacity = Min(length, maxLength);
+ uint32_t nbytes = offsetOfInlineElements() + elementSize * capacity;
+
+ UnboxedArrayObject* res;
+ if (nbytes <= JSObject::MAX_BYTE_SIZE) {
+ gc::AllocKind allocKind = gc::GetGCObjectKindForBytes(nbytes);
+
+ // If there was no provided length information, pick an allocation kind
+ // to accommodate small arrays (as is done for normal native arrays).
+ if (capacity == 0)
+ allocKind = gc::AllocKind::OBJECT8;
+
+ res = NewObjectWithGroup<UnboxedArrayObject>(cx, group, allocKind, newKind);
+ if (!res)
+ return nullptr;
+ res->setInitializedLengthNoBarrier(0);
+ res->setInlineElements();
+
+ size_t actualCapacity = (GetGCKindBytes(allocKind) - offsetOfInlineElements()) / elementSize;
+ MOZ_ASSERT(actualCapacity >= capacity);
+ res->setCapacityIndex(exactCapacityIndex(actualCapacity));
+ } else {
+ res = NewObjectWithGroup<UnboxedArrayObject>(cx, group, gc::AllocKind::OBJECT0, newKind);
+ if (!res)
+ return nullptr;
+ res->setInitializedLengthNoBarrier(0);
+
+ uint32_t capacityIndex = (capacity == length)
+ ? CapacityMatchesLengthIndex
+ : chooseCapacityIndex(capacity, length);
+ uint32_t actualCapacity = computeCapacity(capacityIndex, length);
+
+ res->elements_ = AllocateObjectBuffer<uint8_t>(cx, res, actualCapacity * elementSize);
+ if (!res->elements_) {
+ // Make the object safe for GC.
+ res->setInlineElements();
+ return nullptr;
+ }
+
+ res->setCapacityIndex(capacityIndex);
+ }
+
+ res->setLength(cx, length);
+ return res;
+}
+
+bool
+UnboxedArrayObject::setElement(ExclusiveContext* cx, size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ uint8_t* p = elements() + index * elementSize();
+ return SetUnboxedValue(cx, this, JSID_VOID, p, elementType(), v, /* preBarrier = */ true);
+}
+
+bool
+UnboxedArrayObject::initElement(ExclusiveContext* cx, size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ uint8_t* p = elements() + index * elementSize();
+ return SetUnboxedValue(cx, this, JSID_VOID, p, elementType(), v, /* preBarrier = */ false);
+}
+
+void
+UnboxedArrayObject::initElementNoTypeChange(size_t index, const Value& v)
+{
+ MOZ_ASSERT(index < initializedLength());
+ uint8_t* p = elements() + index * elementSize();
+ if (UnboxedTypeNeedsPreBarrier(elementType()))
+ *reinterpret_cast<void**>(p) = nullptr;
+ SetUnboxedValueNoTypeChange(this, p, elementType(), v, /* preBarrier = */ false);
+}
+
+Value
+UnboxedArrayObject::getElement(size_t index)
+{
+ MOZ_ASSERT(index < initializedLength());
+ uint8_t* p = elements() + index * elementSize();
+ return GetUnboxedValue(p, elementType(), /* maybeUninitialized = */ false);
+}
+
+/* static */ void
+UnboxedArrayObject::trace(JSTracer* trc, JSObject* obj)
+{
+ JSValueType type = obj->as<UnboxedArrayObject>().elementType();
+ if (!UnboxedTypeNeedsPreBarrier(type))
+ return;
+
+ MOZ_ASSERT(obj->as<UnboxedArrayObject>().elementSize() == sizeof(uintptr_t));
+ size_t initlen = obj->as<UnboxedArrayObject>().initializedLength();
+ void** elements = reinterpret_cast<void**>(obj->as<UnboxedArrayObject>().elements());
+
+ switch (type) {
+ case JSVAL_TYPE_OBJECT:
+ for (size_t i = 0; i < initlen; i++) {
+ GCPtrObject* heap = reinterpret_cast<GCPtrObject*>(elements + i);
+ TraceNullableEdge(trc, heap, "unboxed_object");
+ }
+ break;
+
+ case JSVAL_TYPE_STRING:
+ for (size_t i = 0; i < initlen; i++) {
+ GCPtrString* heap = reinterpret_cast<GCPtrString*>(elements + i);
+ TraceEdge(trc, heap, "unboxed_string");
+ }
+ break;
+
+ default:
+ MOZ_CRASH();
+ }
+}
+
+/* static */ void
+UnboxedArrayObject::objectMoved(JSObject* obj, const JSObject* old)
+{
+ UnboxedArrayObject& dst = obj->as<UnboxedArrayObject>();
+ const UnboxedArrayObject& src = old->as<UnboxedArrayObject>();
+
+ // Fix up possible inline data pointer.
+ if (src.hasInlineElements())
+ dst.setInlineElements();
+}
+
+/* static */ void
+UnboxedArrayObject::finalize(FreeOp* fop, JSObject* obj)
+{
+ MOZ_ASSERT(!IsInsideNursery(obj));
+ if (!obj->as<UnboxedArrayObject>().hasInlineElements())
+ js_free(obj->as<UnboxedArrayObject>().elements());
+}
+
+/* static */ size_t
+UnboxedArrayObject::objectMovedDuringMinorGC(JSTracer* trc, JSObject* dst, JSObject* src,
+ gc::AllocKind allocKind)
+{
+ UnboxedArrayObject* ndst = &dst->as<UnboxedArrayObject>();
+ UnboxedArrayObject* nsrc = &src->as<UnboxedArrayObject>();
+ MOZ_ASSERT(ndst->elements() == nsrc->elements());
+
+ Nursery& nursery = trc->runtime()->gc.nursery;
+
+ if (!nursery.isInside(nsrc->elements())) {
+ nursery.removeMallocedBuffer(nsrc->elements());
+ return 0;
+ }
+
+ // Determine if we can use inline data for the target array. If this is
+ // possible, the nursery will have picked an allocation size that is large
+ // enough.
+ size_t nbytes = nsrc->capacity() * nsrc->elementSize();
+ if (offsetOfInlineElements() + nbytes <= GetGCKindBytes(allocKind)) {
+ ndst->setInlineElements();
+ } else {
+ MOZ_ASSERT(allocKind == gc::AllocKind::OBJECT0);
+
+ AutoEnterOOMUnsafeRegion oomUnsafe;
+ uint8_t* data = nsrc->zone()->pod_malloc<uint8_t>(nbytes);
+ if (!data)
+ oomUnsafe.crash("Failed to allocate unboxed array elements while tenuring.");
+ ndst->elements_ = data;
+ }
+
+ PodCopy(ndst->elements(), nsrc->elements(), nsrc->initializedLength() * nsrc->elementSize());
+
+ // Set a forwarding pointer for the element buffers in case they were
+ // preserved on the stack by Ion.
+ bool direct = nsrc->capacity() * nsrc->elementSize() >= sizeof(uintptr_t);
+ nursery.maybeSetForwardingPointer(trc, nsrc->elements(), ndst->elements(), direct);
+
+ return ndst->hasInlineElements() ? 0 : nbytes;
+}
+
+// Possible capacities for unboxed arrays. Some of these capacities might seem
+// a little weird, but were chosen to allow the inline data of objects of each
+// size to be fully utilized for arrays of the various types on both 32 bit and
+// 64 bit platforms.
+//
+// To find the possible inline capacities, the following script was used:
+//
+// var fixedSlotCapacities = [0, 2, 4, 8, 12, 16];
+// var dataSizes = [1, 4, 8];
+// var header32 = 4 * 2 + 4 * 2;
+// var header64 = 8 * 2 + 4 * 2;
+//
+// for (var i = 0; i < fixedSlotCapacities.length; i++) {
+// var nfixed = fixedSlotCapacities[i];
+// var size32 = 4 * 4 + 8 * nfixed - header32;
+// var size64 = 8 * 4 + 8 * nfixed - header64;
+// for (var j = 0; j < dataSizes.length; j++) {
+// print(size32 / dataSizes[j]);
+// print(size64 / dataSizes[j]);
+// }
+// }
+//
+/* static */ const uint32_t
+UnboxedArrayObject::CapacityArray[] = {
+ UINT32_MAX, // For CapacityMatchesLengthIndex.
+ 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 16, 17, 18, 24, 26, 32, 34, 40, 64, 72, 96, 104, 128, 136,
+ 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288,
+ 1048576, 2097152, 3145728, 4194304, 5242880, 6291456, 7340032, 8388608, 9437184, 11534336,
+ 13631488, 15728640, 17825792, 20971520, 24117248, 27262976, 31457280, 35651584, 40894464,
+ 46137344, 52428800, 59768832, MaximumCapacity
+};
+
+static const uint32_t
+Pow2CapacityIndexes[] = {
+ 2, // 1
+ 3, // 2
+ 5, // 4
+ 8, // 8
+ 13, // 16
+ 18, // 32
+ 21, // 64
+ 25, // 128
+ 27, // 256
+ 28, // 512
+ 29, // 1024
+ 30, // 2048
+ 31, // 4096
+ 32, // 8192
+ 33, // 16384
+ 34, // 32768
+ 35, // 65536
+ 36, // 131072
+ 37, // 262144
+ 38, // 524288
+ 39 // 1048576
+};
+
+static const uint32_t MebiCapacityIndex = 39;
+
+/* static */ uint32_t
+UnboxedArrayObject::chooseCapacityIndex(uint32_t capacity, uint32_t length)
+{
+ // Note: the structure and behavior of this method follow along with
+ // NativeObject::goodAllocated. Changes to the allocation strategy in one
+ // should generally be matched by the other.
+
+ // Make sure we have enough space to store all possible values for the capacity index.
+ // This ought to be a static_assert, but MSVC doesn't like that.
+ MOZ_ASSERT(mozilla::ArrayLength(CapacityArray) - 1 <= (CapacityMask >> CapacityShift));
+
+ // The caller should have ensured the capacity is possible for an unboxed array.
+ MOZ_ASSERT(capacity <= MaximumCapacity);
+
+ static const uint32_t Mebi = 1024 * 1024;
+
+ if (capacity <= Mebi) {
+ capacity = mozilla::RoundUpPow2(capacity);
+
+ // When the required capacity is close to the array length, then round
+ // up to the array length itself, as for NativeObject.
+ if (length >= capacity && capacity > (length / 3) * 2)
+ return CapacityMatchesLengthIndex;
+
+ if (capacity < MinimumDynamicCapacity)
+ capacity = MinimumDynamicCapacity;
+
+ uint32_t bit = mozilla::FloorLog2Size(capacity);
+ MOZ_ASSERT(capacity == uint32_t(1 << bit));
+ MOZ_ASSERT(bit <= 20);
+ MOZ_ASSERT(mozilla::ArrayLength(Pow2CapacityIndexes) == 21);
+
+ uint32_t index = Pow2CapacityIndexes[bit];
+ MOZ_ASSERT(CapacityArray[index] == capacity);
+
+ return index;
+ }
+
+ MOZ_ASSERT(CapacityArray[MebiCapacityIndex] == Mebi);
+
+ for (uint32_t i = MebiCapacityIndex + 1;; i++) {
+ if (CapacityArray[i] >= capacity)
+ return i;
+ }
+
+ MOZ_CRASH("Invalid capacity");
+}
+
+/* static */ uint32_t
+UnboxedArrayObject::exactCapacityIndex(uint32_t capacity)
+{
+ for (size_t i = CapacityMatchesLengthIndex + 1; i < ArrayLength(CapacityArray); i++) {
+ if (CapacityArray[i] == capacity)
+ return i;
+ }
+ MOZ_CRASH();
+}
+
+bool
+UnboxedArrayObject::growElements(ExclusiveContext* cx, size_t cap)
+{
+ // The caller should have checked if this capacity is possible for an
+ // unboxed array, so the only way this call can fail is from OOM.
+ MOZ_ASSERT(cap <= MaximumCapacity);
+
+ uint32_t oldCapacity = capacity();
+ uint32_t newCapacityIndex = chooseCapacityIndex(cap, length());
+ uint32_t newCapacity = computeCapacity(newCapacityIndex, length());
+
+ MOZ_ASSERT(oldCapacity < cap);
+ MOZ_ASSERT(cap <= newCapacity);
+
+ // The allocation size computation below cannot have integer overflows.
+ JS_STATIC_ASSERT(MaximumCapacity < UINT32_MAX / sizeof(double));
+
+ uint8_t* newElements;
+ if (hasInlineElements()) {
+ newElements = AllocateObjectBuffer<uint8_t>(cx, this, newCapacity * elementSize());
+ if (!newElements)
+ return false;
+ js_memcpy(newElements, elements(), initializedLength() * elementSize());
+ } else {
+ newElements = ReallocateObjectBuffer<uint8_t>(cx, this, elements(),
+ oldCapacity * elementSize(),
+ newCapacity * elementSize());
+ if (!newElements)
+ return false;
+ }
+
+ elements_ = newElements;
+ setCapacityIndex(newCapacityIndex);
+
+ return true;
+}
+
+void
+UnboxedArrayObject::shrinkElements(ExclusiveContext* cx, size_t cap)
+{
+ if (hasInlineElements())
+ return;
+
+ uint32_t oldCapacity = capacity();
+ uint32_t newCapacityIndex = chooseCapacityIndex(cap, 0);
+ uint32_t newCapacity = computeCapacity(newCapacityIndex, 0);
+
+ MOZ_ASSERT(cap < oldCapacity);
+ MOZ_ASSERT(cap <= newCapacity);
+
+ if (newCapacity >= oldCapacity)
+ return;
+
+ uint8_t* newElements = ReallocateObjectBuffer<uint8_t>(cx, this, elements(),
+ oldCapacity * elementSize(),
+ newCapacity * elementSize());
+ if (!newElements)
+ return;
+
+ elements_ = newElements;
+ setCapacityIndex(newCapacityIndex);
+}
+
+bool
+UnboxedArrayObject::containsProperty(ExclusiveContext* cx, jsid id)
+{
+ if (JSID_IS_INT(id) && uint32_t(JSID_TO_INT(id)) < initializedLength())
+ return true;
+ if (JSID_IS_ATOM(id) && JSID_TO_ATOM(id) == cx->names().length)
+ return true;
+ return false;
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_lookupProperty(JSContext* cx, HandleObject obj,
+ HandleId id, MutableHandleObject objp,
+ MutableHandleShape propp)
+{
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ MarkNonNativePropertyFound<CanGC>(propp);
+ objp.set(obj);
+ return true;
+ }
+
+ RootedObject proto(cx, obj->staticPrototype());
+ if (!proto) {
+ objp.set(nullptr);
+ propp.set(nullptr);
+ return true;
+ }
+
+ return LookupProperty(cx, proto, id, objp, propp);
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_defineProperty(JSContext* cx, HandleObject obj, HandleId id,
+ Handle<PropertyDescriptor> desc,
+ ObjectOpResult& result)
+{
+ if (JSID_IS_INT(id) && !desc.getter() && !desc.setter() && desc.attributes() == JSPROP_ENUMERATE) {
+ UnboxedArrayObject* nobj = &obj->as<UnboxedArrayObject>();
+
+ uint32_t index = JSID_TO_INT(id);
+ if (index < nobj->initializedLength()) {
+ if (nobj->setElement(cx, index, desc.value()))
+ return result.succeed();
+ } else if (index == nobj->initializedLength() && index < MaximumCapacity) {
+ if (nobj->initializedLength() == nobj->capacity()) {
+ if (!nobj->growElements(cx, index + 1))
+ return false;
+ }
+ nobj->setInitializedLength(index + 1);
+ if (nobj->initElement(cx, index, desc.value())) {
+ if (nobj->length() <= index)
+ nobj->setLengthInt32(index + 1);
+ return result.succeed();
+ }
+ nobj->setInitializedLengthNoBarrier(index);
+ }
+ }
+
+ if (!convertToNative(cx, obj))
+ return false;
+
+ return DefineProperty(cx, obj, id, desc, result);
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_hasProperty(JSContext* cx, HandleObject obj, HandleId id, bool* foundp)
+{
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ *foundp = true;
+ return true;
+ }
+
+ RootedObject proto(cx, obj->staticPrototype());
+ if (!proto) {
+ *foundp = false;
+ return true;
+ }
+
+ return HasProperty(cx, proto, id, foundp);
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_getProperty(JSContext* cx, HandleObject obj, HandleValue receiver,
+ HandleId id, MutableHandleValue vp)
+{
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ if (JSID_IS_INT(id))
+ vp.set(obj->as<UnboxedArrayObject>().getElement(JSID_TO_INT(id)));
+ else
+ vp.set(Int32Value(obj->as<UnboxedArrayObject>().length()));
+ return true;
+ }
+
+ RootedObject proto(cx, obj->staticPrototype());
+ if (!proto) {
+ vp.setUndefined();
+ return true;
+ }
+
+ return GetProperty(cx, proto, receiver, id, vp);
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_setProperty(JSContext* cx, HandleObject obj, HandleId id, HandleValue v,
+ HandleValue receiver, ObjectOpResult& result)
+{
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ if (receiver.isObject() && obj == &receiver.toObject()) {
+ if (JSID_IS_INT(id)) {
+ if (obj->as<UnboxedArrayObject>().setElement(cx, JSID_TO_INT(id), v))
+ return result.succeed();
+ } else {
+ uint32_t len;
+ if (!CanonicalizeArrayLengthValue(cx, v, &len))
+ return false;
+ UnboxedArrayObject* nobj = &obj->as<UnboxedArrayObject>();
+ if (len < nobj->initializedLength()) {
+ nobj->setInitializedLength(len);
+ nobj->shrinkElements(cx, len);
+ }
+ nobj->setLength(cx, len);
+ return result.succeed();
+ }
+
+ if (!convertToNative(cx, obj))
+ return false;
+ return SetProperty(cx, obj, id, v, receiver, result);
+ }
+
+ return SetPropertyByDefining(cx, id, v, receiver, result);
+ }
+
+ return SetPropertyOnProto(cx, obj, id, v, receiver, result);
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_getOwnPropertyDescriptor(JSContext* cx, HandleObject obj, HandleId id,
+ MutableHandle<PropertyDescriptor> desc)
+{
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ if (JSID_IS_INT(id)) {
+ desc.value().set(obj->as<UnboxedArrayObject>().getElement(JSID_TO_INT(id)));
+ desc.setAttributes(JSPROP_ENUMERATE);
+ } else {
+ desc.value().set(Int32Value(obj->as<UnboxedArrayObject>().length()));
+ desc.setAttributes(JSPROP_PERMANENT);
+ }
+ desc.object().set(obj);
+ return true;
+ }
+
+ desc.object().set(nullptr);
+ return true;
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_deleteProperty(JSContext* cx, HandleObject obj, HandleId id,
+ ObjectOpResult& result)
+{
+ if (obj->as<UnboxedArrayObject>().containsProperty(cx, id)) {
+ size_t initlen = obj->as<UnboxedArrayObject>().initializedLength();
+ if (JSID_IS_INT(id) && JSID_TO_INT(id) == int32_t(initlen - 1)) {
+ obj->as<UnboxedArrayObject>().setInitializedLength(initlen - 1);
+ obj->as<UnboxedArrayObject>().shrinkElements(cx, initlen - 1);
+ return result.succeed();
+ }
+ }
+
+ if (!convertToNative(cx, obj))
+ return false;
+ return DeleteProperty(cx, obj, id, result);
+}
+
+/* static */ bool
+UnboxedArrayObject::obj_enumerate(JSContext* cx, HandleObject obj, AutoIdVector& properties,
+ bool enumerableOnly)
+{
+ for (size_t i = 0; i < obj->as<UnboxedArrayObject>().initializedLength(); i++) {
+ if (!properties.append(INT_TO_JSID(i)))
+ return false;
+ }
+
+ if (!enumerableOnly && !properties.append(NameToId(cx->names().length)))
+ return false;
+
+ return true;
+}
+
+static const ClassOps UnboxedArrayObjectClassOps = {
+ nullptr, /* addProperty */
+ nullptr, /* delProperty */
+ nullptr, /* getProperty */
+ nullptr, /* setProperty */
+ nullptr, /* enumerate */
+ nullptr, /* resolve */
+ nullptr, /* mayResolve */
+ UnboxedArrayObject::finalize,
+ nullptr, /* call */
+ nullptr, /* hasInstance */
+ nullptr, /* construct */
+ UnboxedArrayObject::trace,
+};
+
+static const ClassExtension UnboxedArrayObjectClassExtension = {
+ nullptr, /* weakmapKeyDelegateOp */
+ UnboxedArrayObject::objectMoved
+};
+
+static const ObjectOps UnboxedArrayObjectObjectOps = {
+ UnboxedArrayObject::obj_lookupProperty,
+ UnboxedArrayObject::obj_defineProperty,
+ UnboxedArrayObject::obj_hasProperty,
+ UnboxedArrayObject::obj_getProperty,
+ UnboxedArrayObject::obj_setProperty,
+ UnboxedArrayObject::obj_getOwnPropertyDescriptor,
+ UnboxedArrayObject::obj_deleteProperty,
+ nullptr, /* getElements */
+ UnboxedArrayObject::obj_enumerate,
+ nullptr /* funToString */
+};
+
+const Class UnboxedArrayObject::class_ = {
+ "Array",
+ Class::NON_NATIVE |
+ JSCLASS_SKIP_NURSERY_FINALIZE |
+ JSCLASS_BACKGROUND_FINALIZE,
+ &UnboxedArrayObjectClassOps,
+ JS_NULL_CLASS_SPEC,
+ &UnboxedArrayObjectClassExtension,
+ &UnboxedArrayObjectObjectOps
+};
+
+/////////////////////////////////////////////////////////////////////
// API
/////////////////////////////////////////////////////////////////////
@@ -936,6 +1642,31 @@ NextValue(Handle<GCVector<Value>> values, size_t* valueCursor)
}
void
+UnboxedArrayObject::fillAfterConvert(ExclusiveContext* cx,
+ Handle<GCVector<Value>> values, size_t* valueCursor)
+{
+ MOZ_ASSERT(CapacityArray[1] == 0);
+ setCapacityIndex(1);
+ setInitializedLengthNoBarrier(0);
+ setInlineElements();
+
+ setLength(cx, NextValue(values, valueCursor).toInt32());
+
+ int32_t initlen = NextValue(values, valueCursor).toInt32();
+ if (!initlen)
+ return;
+
+ AutoEnterOOMUnsafeRegion oomUnsafe;
+ if (!growElements(cx, initlen))
+ oomUnsafe.crash("UnboxedArrayObject::fillAfterConvert");
+
+ setInitializedLength(initlen);
+
+ for (size_t i = 0; i < size_t(initlen); i++)
+ JS_ALWAYS_TRUE(initElement(cx, i, NextValue(values, valueCursor)));
+}
+
+void
UnboxedPlainObject::fillAfterConvert(ExclusiveContext* cx,
Handle<GCVector<Value>> values, size_t* valueCursor)
{
@@ -944,3 +1675,58 @@ UnboxedPlainObject::fillAfterConvert(ExclusiveContext* cx,
for (size_t i = 0; i < layout().properties().length(); i++)
JS_ALWAYS_TRUE(setValue(cx, layout().properties()[i], NextValue(values, valueCursor)));
}
+
+DefineBoxedOrUnboxedFunctor6(SetOrExtendBoxedOrUnboxedDenseElements,
+ ExclusiveContext*, JSObject*, uint32_t, const Value*, uint32_t,
+ ShouldUpdateTypes);
+
+DenseElementResult
+js::SetOrExtendAnyBoxedOrUnboxedDenseElements(ExclusiveContext* cx, JSObject* obj,
+ uint32_t start, const Value* vp, uint32_t count,
+ ShouldUpdateTypes updateTypes)
+{
+ SetOrExtendBoxedOrUnboxedDenseElementsFunctor functor(cx, obj, start, vp, count, updateTypes);
+ return CallBoxedOrUnboxedSpecialization(functor, obj);
+};
+
+DefineBoxedOrUnboxedFunctor5(MoveBoxedOrUnboxedDenseElements,
+ JSContext*, JSObject*, uint32_t, uint32_t, uint32_t);
+
+DenseElementResult
+js::MoveAnyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* obj,
+ uint32_t dstStart, uint32_t srcStart, uint32_t length)
+{
+ MoveBoxedOrUnboxedDenseElementsFunctor functor(cx, obj, dstStart, srcStart, length);
+ return CallBoxedOrUnboxedSpecialization(functor, obj);
+}
+
+DefineBoxedOrUnboxedFunctorPair6(CopyBoxedOrUnboxedDenseElements,
+ JSContext*, JSObject*, JSObject*, uint32_t, uint32_t, uint32_t);
+
+DenseElementResult
+js::CopyAnyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* dst, JSObject* src,
+ uint32_t dstStart, uint32_t srcStart, uint32_t length)
+{
+ CopyBoxedOrUnboxedDenseElementsFunctor functor(cx, dst, src, dstStart, srcStart, length);
+ return CallBoxedOrUnboxedSpecialization(functor, dst, src);
+}
+
+DefineBoxedOrUnboxedFunctor3(SetBoxedOrUnboxedInitializedLength,
+ JSContext*, JSObject*, size_t);
+
+void
+js::SetAnyBoxedOrUnboxedInitializedLength(JSContext* cx, JSObject* obj, size_t initlen)
+{
+ SetBoxedOrUnboxedInitializedLengthFunctor functor(cx, obj, initlen);
+ JS_ALWAYS_TRUE(CallBoxedOrUnboxedSpecialization(functor, obj) == DenseElementResult::Success);
+}
+
+DefineBoxedOrUnboxedFunctor3(EnsureBoxedOrUnboxedDenseElements,
+ JSContext*, JSObject*, size_t);
+
+DenseElementResult
+js::EnsureAnyBoxedOrUnboxedDenseElements(JSContext* cx, JSObject* obj, size_t initlen)
+{
+ EnsureBoxedOrUnboxedDenseElementsFunctor functor(cx, obj, initlen);
+ return CallBoxedOrUnboxedSpecialization(functor, obj);
+}
diff --git a/js/src/vm/UnboxedObject.h b/js/src/vm/UnboxedObject.h
index ba66434bc..779dd14c7 100644
--- a/js/src/vm/UnboxedObject.h
+++ b/js/src/vm/UnboxedObject.h
@@ -96,11 +96,17 @@ class UnboxedLayout : public mozilla::LinkedListElement<UnboxedLayout>
// from an array of values.
GCPtrJitCode constructorCode_;
+ // The following members are only used for unboxed arrays.
+
+ // The type of array elements.
+ JSValueType elementType_;
+
public:
UnboxedLayout()
: nativeGroup_(nullptr), nativeShape_(nullptr),
allocationScript_(nullptr), allocationPc_(nullptr), replacementGroup_(nullptr),
- size_(0), newScript_(nullptr), traceList_(nullptr), constructorCode_(nullptr)
+ size_(0), newScript_(nullptr), traceList_(nullptr), constructorCode_(nullptr),
+ elementType_(JSVAL_TYPE_MAGIC)
{}
bool initProperties(const PropertyVector& properties, size_t size) {
@@ -108,6 +114,10 @@ class UnboxedLayout : public mozilla::LinkedListElement<UnboxedLayout>
return properties_.appendAll(properties);
}
+ void initArray(JSValueType elementType) {
+ elementType_ = elementType;
+ }
+
~UnboxedLayout() {
if (newScript_)
newScript_->clear();
@@ -120,6 +130,10 @@ class UnboxedLayout : public mozilla::LinkedListElement<UnboxedLayout>
constructorCode_.init(nullptr);
}
+ bool isArray() const {
+ return elementType_ != JSVAL_TYPE_MAGIC;
+ }
+
void detachFromCompartment();
const PropertyVector& properties() const {
@@ -187,6 +201,10 @@ class UnboxedLayout : public mozilla::LinkedListElement<UnboxedLayout>
constructorCode_ = code;
}
+ JSValueType elementType() const {
+ return elementType_;
+ }
+
inline gc::AllocKind getAllocKind() const;
void trace(JSTracer* trc);
@@ -306,6 +324,193 @@ UnboxedLayout::getAllocKind() const
return gc::GetGCObjectKindForBytes(UnboxedPlainObject::offsetOfData() + size());
}
+// Class for an array object using an unboxed representation.
+class UnboxedArrayObject : public JSObject
+{
+ // Elements pointer for the object.
+ uint8_t* elements_;
+
+ // The nominal array length. This always fits in an int32_t.
+ uint32_t length_;
+
+ // Value indicating the allocated capacity and initialized length of the
+ // array. The top CapacityBits bits are an index into CapacityArray, which
+ // indicates the elements capacity. The low InitializedLengthBits store the
+ // initialized length of the array.
+ uint32_t capacityIndexAndInitializedLength_;
+
+ // If the elements are inline, they will point here.
+ uint8_t inlineElements_[1];
+
+ public:
+ static const uint32_t CapacityBits = 6;
+ static const uint32_t CapacityShift = 26;
+
+ static const uint32_t CapacityMask = uint32_t(-1) << CapacityShift;
+ static const uint32_t InitializedLengthMask = (1 << CapacityShift) - 1;
+
+ static const uint32_t MaximumCapacity = InitializedLengthMask;
+ static const uint32_t MinimumDynamicCapacity = 8;
+
+ static const uint32_t CapacityArray[];
+
+ // Capacity index which indicates the array's length is also its capacity.
+ static const uint32_t CapacityMatchesLengthIndex = 0;
+
+ private:
+ static inline uint32_t computeCapacity(uint32_t index, uint32_t length) {
+ if (index == CapacityMatchesLengthIndex)
+ return length;
+ return CapacityArray[index];
+ }
+
+ static uint32_t chooseCapacityIndex(uint32_t capacity, uint32_t length);
+ static uint32_t exactCapacityIndex(uint32_t capacity);
+
+ public:
+ static const Class class_;
+
+ static bool obj_lookupProperty(JSContext* cx, HandleObject obj,
+ HandleId id, MutableHandleObject objp,
+ MutableHandleShape propp);
+
+ static bool obj_defineProperty(JSContext* cx, HandleObject obj, HandleId id,
+ Handle<PropertyDescriptor> desc,
+ ObjectOpResult& result);
+
+ static bool obj_hasProperty(JSContext* cx, HandleObject obj, HandleId id, bool* foundp);
+
+ static bool obj_getProperty(JSContext* cx, HandleObject obj, HandleValue receiver,
+ HandleId id, MutableHandleValue vp);
+
+ static bool obj_setProperty(JSContext* cx, HandleObject obj, HandleId id, HandleValue v,
+ HandleValue receiver, ObjectOpResult& result);
+
+ static bool obj_getOwnPropertyDescriptor(JSContext* cx, HandleObject obj, HandleId id,
+ MutableHandle<PropertyDescriptor> desc);
+
+ static bool obj_deleteProperty(JSContext* cx, HandleObject obj, HandleId id,
+ ObjectOpResult& result);
+
+ static bool obj_enumerate(JSContext* cx, HandleObject obj, AutoIdVector& properties,
+ bool enumerableOnly);
+ static bool obj_watch(JSContext* cx, HandleObject obj, HandleId id, HandleObject callable);
+
+ inline const UnboxedLayout& layout() const;
+
+ const UnboxedLayout& layoutDontCheckGeneration() const {
+ return group()->unboxedLayoutDontCheckGeneration();
+ }
+
+ JSValueType elementType() const {
+ return layoutDontCheckGeneration().elementType();
+ }
+
+ uint32_t elementSize() const {
+ return UnboxedTypeSize(elementType());
+ }
+
+ static bool convertToNative(JSContext* cx, JSObject* obj);
+ static UnboxedArrayObject* create(ExclusiveContext* cx, HandleObjectGroup group,
+ uint32_t length, NewObjectKind newKind,
+ uint32_t maxLength = MaximumCapacity);
+
+ static bool convertToNativeWithGroup(ExclusiveContext* cx, JSObject* obj,
+ ObjectGroup* group, Shape* shape);
+ bool convertInt32ToDouble(ExclusiveContext* cx, ObjectGroup* group);
+
+ void fillAfterConvert(ExclusiveContext* cx,
+ Handle<GCVector<Value>> values, size_t* valueCursor);
+
+ static void trace(JSTracer* trc, JSObject* object);
+ static void objectMoved(JSObject* obj, const JSObject* old);
+ static void finalize(FreeOp* fop, JSObject* obj);
+
+ static size_t objectMovedDuringMinorGC(JSTracer* trc, JSObject* dst, JSObject* src,
+ gc::AllocKind allocKind);
+
+ uint8_t* elements() {
+ return elements_;
+ }
+
+ bool hasInlineElements() const {
+ return elements_ == &inlineElements_[0];
+ }
+
+ uint32_t length() const {
+ return length_;
+ }
+
+ uint32_t initializedLength() const {
+ return capacityIndexAndInitializedLength_ & InitializedLengthMask;
+ }
+
+ uint32_t capacityIndex() const {
+ return (capacityIndexAndInitializedLength_ & CapacityMask) >> CapacityShift;
+ }
+
+ uint32_t capacity() const {
+ return computeCapacity(capacityIndex(), length());
+ }
+
+ bool containsProperty(ExclusiveContext* cx, jsid id);
+
+ bool setElement(ExclusiveContext* cx, size_t index, const Value& v);
+ bool initElement(ExclusiveContext* cx, size_t index, const Value& v);
+ void initElementNoTypeChange(size_t index, const Value& v);
+ Value getElement(size_t index);
+
+ template <JSValueType Type> inline bool setElementSpecific(ExclusiveContext* cx, size_t index,
+ const Value& v);
+ template <JSValueType Type> inline void setElementNoTypeChangeSpecific(size_t index, const Value& v);
+ template <JSValueType Type> inline bool initElementSpecific(ExclusiveContext* cx, size_t index,
+ const Value& v);
+ template <JSValueType Type> inline void initElementNoTypeChangeSpecific(size_t index, const Value& v);
+ template <JSValueType Type> inline Value getElementSpecific(size_t index);
+ template <JSValueType Type> inline void triggerPreBarrier(size_t index);
+
+ bool growElements(ExclusiveContext* cx, size_t cap);
+ void shrinkElements(ExclusiveContext* cx, size_t cap);
+
+ static uint32_t offsetOfElements() {
+ return offsetof(UnboxedArrayObject, elements_);
+ }
+ static uint32_t offsetOfLength() {
+ return offsetof(UnboxedArrayObject, length_);
+ }
+ static uint32_t offsetOfCapacityIndexAndInitializedLength() {
+ return offsetof(UnboxedArrayObject, capacityIndexAndInitializedLength_);
+ }
+ static uint32_t offsetOfInlineElements() {
+ return offsetof(UnboxedArrayObject, inlineElements_);
+ }
+
+ void setLengthInt32(uint32_t length) {
+ MOZ_ASSERT(length <= INT32_MAX);
+ length_ = length;
+ }
+
+ inline void setLength(ExclusiveContext* cx, uint32_t len);
+ inline void setInitializedLength(uint32_t initlen);
+
+ inline void setInitializedLengthNoBarrier(uint32_t initlen) {
+ MOZ_ASSERT(initlen <= InitializedLengthMask);
+ capacityIndexAndInitializedLength_ =
+ (capacityIndexAndInitializedLength_ & CapacityMask) | initlen;
+ }
+
+ private:
+ void setInlineElements() {
+ elements_ = &inlineElements_[0];
+ }
+
+ void setCapacityIndex(uint32_t index) {
+ MOZ_ASSERT(index <= (CapacityMask >> CapacityShift));
+ capacityIndexAndInitializedLength_ =
+ (index << CapacityShift) | initializedLength();
+ }
+};
+
} // namespace js
namespace JS {