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-rw-r--r--js/src/frontend/BytecodeEmitter.cpp277
-rw-r--r--js/src/frontend/BytecodeEmitter.h18
-rw-r--r--js/src/jit/BaselineCompiler.cpp30
-rw-r--r--js/src/jit/BaselineCompiler.h1
-rw-r--r--js/src/jit/IonBuilder.cpp5
-rw-r--r--js/src/jit/MIRGraph.cpp13
-rw-r--r--js/src/jit/MIRGraph.h3
-rw-r--r--js/src/tests/ecma_6/Destructuring/order-super.js727
-rw-r--r--js/src/tests/ecma_6/Destructuring/order.js745
-rw-r--r--js/src/vm/Interpreter.cpp11
-rw-r--r--js/src/vm/Opcodes.h10
11 files changed, 1743 insertions, 97 deletions
diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index a68fe8538..a4cfeb753 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -4325,7 +4325,69 @@ BytecodeEmitter::emitDestructuringDeclsWithEmitter(ParseNode* pattern, NameEmitt
}
bool
-BytecodeEmitter::emitDestructuringLHS(ParseNode* target, DestructuringFlavor flav)
+BytecodeEmitter::emitDestructuringLHSRef(ParseNode* target, size_t* emitted)
+{
+ *emitted = 0;
+
+ if (target->isKind(PNK_SPREAD))
+ target = target->pn_kid;
+ else if (target->isKind(PNK_ASSIGN))
+ target = target->pn_left;
+
+ // No need to recur into PNK_ARRAY and PNK_OBJECT subpatterns here, since
+ // emitSetOrInitializeDestructuring does the recursion when setting or
+ // initializing value. Getting reference doesn't recur.
+ if (target->isKind(PNK_NAME) || target->isKind(PNK_ARRAY) || target->isKind(PNK_OBJECT))
+ return true;
+
+#ifdef DEBUG
+ int depth = stackDepth;
+#endif
+
+ switch (target->getKind()) {
+ case PNK_DOT: {
+ if (target->as<PropertyAccess>().isSuper()) {
+ if (!emitSuperPropLHS(&target->as<PropertyAccess>().expression()))
+ return false;
+ *emitted = 2;
+ } else {
+ if (!emitTree(target->pn_expr))
+ return false;
+ *emitted = 1;
+ }
+ break;
+ }
+
+ case PNK_ELEM: {
+ if (target->as<PropertyByValue>().isSuper()) {
+ if (!emitSuperElemOperands(target, EmitElemOption::Ref))
+ return false;
+ *emitted = 3;
+ } else {
+ if (!emitElemOperands(target, EmitElemOption::Ref))
+ return false;
+ *emitted = 2;
+ }
+ break;
+ }
+
+ case PNK_CALL:
+ MOZ_ASSERT_UNREACHABLE("Parser::reportIfNotValidSimpleAssignmentTarget "
+ "rejects function calls as assignment "
+ "targets in destructuring assignments");
+ break;
+
+ default:
+ MOZ_CRASH("emitDestructuringLHSRef: bad lhs kind");
+ }
+
+ MOZ_ASSERT(stackDepth == depth + int(*emitted));
+
+ return true;
+}
+
+bool
+BytecodeEmitter::emitSetOrInitializeDestructuring(ParseNode* target, DestructuringFlavor flav)
{
// Now emit the lvalue opcode sequence. If the lvalue is a nested
// destructuring initialiser-form, call ourselves to handle it, then pop
@@ -4401,44 +4463,28 @@ BytecodeEmitter::emitDestructuringLHS(ParseNode* target, DestructuringFlavor fla
}
case PNK_DOT: {
- // See the (PNK_NAME, JSOP_SETNAME) case above.
- //
- // In `a.x = b`, `a` is evaluated first, then `b`, then a
- // JSOP_SETPROP instruction.
- //
- // In `[a.x] = [b]`, per spec, `b` is evaluated before `a`. Then we
- // need a property set -- but the operands are on the stack in the
- // wrong order for JSOP_SETPROP, so we have to add a JSOP_SWAP.
+ // The reference is already pushed by emitDestructuringLHSRef.
JSOp setOp;
- if (target->as<PropertyAccess>().isSuper()) {
- if (!emitSuperPropLHS(&target->as<PropertyAccess>().expression()))
- return false;
- if (!emit2(JSOP_PICK, 2))
- return false;
+ if (target->as<PropertyAccess>().isSuper())
setOp = sc->strict() ? JSOP_STRICTSETPROP_SUPER : JSOP_SETPROP_SUPER;
- } else {
- if (!emitTree(target->pn_expr))
- return false;
- if (!emit1(JSOP_SWAP))
- return false;
+ else
setOp = sc->strict() ? JSOP_STRICTSETPROP : JSOP_SETPROP;
- }
if (!emitAtomOp(target, setOp))
return false;
break;
}
case PNK_ELEM: {
- // See the comment at `case PNK_DOT:` above. This case,
- // `[a[x]] = [b]`, is handled much the same way. The JSOP_SWAP
- // is emitted by emitElemOperands.
+ // The reference is already pushed by emitDestructuringLHSRef.
if (target->as<PropertyByValue>().isSuper()) {
JSOp setOp = sc->strict() ? JSOP_STRICTSETELEM_SUPER : JSOP_SETELEM_SUPER;
- if (!emitSuperElemOp(target, setOp))
+ // emitDestructuringLHSRef already did emitSuperElemOperands
+ // part of emitSuperElemOp. Perform remaining part here.
+ if (!emitElemOpBase(setOp))
return false;
} else {
JSOp setOp = sc->strict() ? JSOP_STRICTSETELEM : JSOP_SETELEM;
- if (!emitElemOp(target, setOp))
+ if (!emitElemOpBase(setOp))
return false;
}
break;
@@ -4451,7 +4497,7 @@ BytecodeEmitter::emitDestructuringLHS(ParseNode* target, DestructuringFlavor fla
break;
default:
- MOZ_CRASH("emitDestructuringLHS: bad lhs kind");
+ MOZ_CRASH("emitSetOrInitializeDestructuring: bad lhs kind");
}
// Pop the assigned value.
@@ -4732,11 +4778,13 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
//
// let x, y;
// let a, b, c, d;
- // let iter, result, done, value; // stack values
+ // let iter, lref, result, done, value; // stack values
//
// iter = x[Symbol.iterator]();
//
// // ==== emitted by loop for a ====
+ // lref = GetReference(a);
+ //
// result = iter.next();
// done = result.done;
//
@@ -4745,9 +4793,11 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
// else
// value = result.value;
//
- // a = value;
+ // SetOrInitialize(lref, value);
//
// // ==== emitted by loop for b ====
+ // lref = GetReference(b);
+ //
// if (done) {
// value = undefined;
// } else {
@@ -4759,7 +4809,7 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
// value = result.value;
// }
//
- // b = value;
+ // SetOrInitialize(lref, value);
//
// // ==== emitted by loop for elision ====
// if (done) {
@@ -4774,6 +4824,8 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
// }
//
// // ==== emitted by loop for c ====
+ // lref = GetReference(c);
+ //
// if (done) {
// value = undefined;
// } else {
@@ -4788,15 +4840,17 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
// if (value === undefined)
// value = y;
//
- // c = value;
+ // SetOrInitialize(lref, value);
//
// // ==== emitted by loop for d ====
+ // lref = GetReference(d);
+ //
// if (done)
// value = [];
// else
// value = [...iter];
//
- // d = value;
+ // SetOrInitialize(lref, value);
// Use an iterator to destructure the RHS, instead of index lookup. We
// must leave the *original* value on the stack.
@@ -4810,31 +4864,40 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
bool hasNext = !!member->pn_next;
if (member->isKind(PNK_SPREAD)) {
+ size_t emitted = 0;
+ if (!emitDestructuringLHSRef(member, &emitted)) // ... OBJ ITER ?DONE *LREF
+ return false;
+
IfThenElseEmitter ifThenElse(this);
if (!isHead) {
// If spread is not the first element of the pattern,
// iterator can already be completed.
- // ... OBJ ITER DONE
- if (!ifThenElse.emitIfElse()) // ... OBJ ITER
+ // ... OBJ ITER DONE *LREF
+ if (emitted) {
+ if (!emit2(JSOP_PICK, emitted)) // ... OBJ ITER *LREF DONE
+ return false;
+ }
+
+ if (!ifThenElse.emitIfElse()) // ... OBJ ITER *LREF
return false;
- if (!emitUint32Operand(JSOP_NEWARRAY, 0)) // ... OBJ ITER ARRAY
+ if (!emitUint32Operand(JSOP_NEWARRAY, 0)) // ... OBJ ITER *LREF ARRAY
return false;
- if (!ifThenElse.emitElse()) // ... OBJ ITER
+ if (!ifThenElse.emitElse()) // ... OBJ ITER *LREF
return false;
}
// If iterator is not completed, create a new array with the rest
// of the iterator.
- if (!emit1(JSOP_DUP)) // ... OBJ ITER
+ if (!emitDupAt(emitted)) // ... OBJ ITER *LREF ITER
return false;
- if (!emitUint32Operand(JSOP_NEWARRAY, 0)) // ... OBJ ITER ITER ARRAY
+ if (!emitUint32Operand(JSOP_NEWARRAY, 0)) // ... OBJ ITER *LREF ITER ARRAY
return false;
- if (!emitNumberOp(0)) // ... OBJ ITER ITER ARRAY INDEX
+ if (!emitNumberOp(0)) // ... OBJ ITER *LREF ITER ARRAY INDEX
return false;
- if (!emitSpread()) // ... OBJ ITER ARRAY INDEX
+ if (!emitSpread()) // ... OBJ ITER *LREF ARRAY INDEX
return false;
- if (!emit1(JSOP_POP)) // ... OBJ ITER ARRAY
+ if (!emit1(JSOP_POP)) // ... OBJ ITER *LREF ARRAY
return false;
if (!isHead) {
@@ -4843,7 +4906,7 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
MOZ_ASSERT(ifThenElse.pushed() == 1);
}
- if (!emitDestructuringLHS(member, flav)) // ... OBJ ITER
+ if (!emitSetOrInitializeDestructuring(member, flav)) // ... OBJ ITER
return false;
MOZ_ASSERT(!hasNext);
@@ -4861,69 +4924,91 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
MOZ_ASSERT(!subpattern->isKind(PNK_SPREAD));
+ size_t emitted = 0;
+ if (!isElision) {
+ if (!emitDestructuringLHSRef(subpattern, &emitted)) // ... OBJ ITER ?DONE *LREF
+ return false;
+ }
+
IfThenElseEmitter ifAlreadyDone(this);
if (!isHead) {
// If this element is not the first element of the pattern,
// iterator can already be completed.
- // ... OBJ ITER DONE
- if (hasNext) {
- if (!emit1(JSOP_DUP)) // ... OBJ ITER DONE DONE
- return false;
+ // ... OBJ ITER DONE *LREF
+ if (emitted) {
+ if (hasNext) {
+ if (!emitDupAt(emitted)) // ... OBJ ITER DONE *LREF DONE
+ return false;
+ } else {
+ if (!emit2(JSOP_PICK, emitted)) // ... OBJ ITER *LREF DONE
+ return false;
+ }
+ } else {
+ if (hasNext) {
+ // The position of LREF in the following stack comment
+ // isn't accurate for the operation, but it's equivalent
+ // since LREF is nothing
+ if (!emit1(JSOP_DUP)) // ... OBJ ITER DONE *LREF DONE
+ return false;
+ }
}
- if (!ifAlreadyDone.emitIfElse()) // ... OBJ ITER ?DONE
+ if (!ifAlreadyDone.emitIfElse()) // ... OBJ ITER ?DONE *LREF
return false;
- if (!emit1(JSOP_UNDEFINED)) // ... OBJ ITER ?DONE UNDEF
+ if (!emit1(JSOP_UNDEFINED)) // ... OBJ ITER ?DONE *LREF UNDEF
return false;
- if (!emit1(JSOP_NOP_DESTRUCTURING)) // ... OBJ ITER ?DONE UNDEF
+ if (!emit1(JSOP_NOP_DESTRUCTURING)) // ... OBJ ITER ?DONE *LREF UNDEF
return false;
- if (!ifAlreadyDone.emitElse()) // ... OBJ ITER ?DONE
+ if (!ifAlreadyDone.emitElse()) // ... OBJ ITER ?DONE *LREF
return false;
if (hasNext) {
- if (!emit1(JSOP_POP)) // ... OBJ ITER
+ if (emitted) {
+ if (!emit2(JSOP_PICK, emitted)) // ... OBJ ITER *LREF DONE
+ return false;
+ }
+ if (!emit1(JSOP_POP)) // ... OBJ ITER *LREF
return false;
}
}
- if (!emit1(JSOP_DUP)) // ... OBJ ITER ITER
- return false;
- if (!emitIteratorNext(pattern)) // ... OBJ ITER RESULT
+ if (emitted) {
+ if (!emitDupAt(emitted)) // ... OBJ ITER *LREF ITER
+ return false;
+ } else {
+ if (!emit1(JSOP_DUP)) // ... OBJ ITER *LREF ITER
+ return false;
+ }
+ if (!emitIteratorNext(pattern)) // ... OBJ ITER *LREF RESULT
return false;
- if (!emit1(JSOP_DUP)) // ... OBJ ITER RESULT RESULT
+ if (!emit1(JSOP_DUP)) // ... OBJ ITER *LREF RESULT RESULT
return false;
- if (!emitAtomOp(cx->names().done, JSOP_GETPROP)) // ... OBJ ITER RESULT DONE
+ if (!emitAtomOp(cx->names().done, JSOP_GETPROP)) // ... OBJ ITER *LREF RESULT DONE
return false;
if (hasNext) {
- if (!emit1(JSOP_DUP)) // ... OBJ ITER RESULT DONE DONE
+ if (!emit1(JSOP_DUP)) // ... OBJ ITER *LREF RESULT DONE DONE
+ return false;
+ if (!emit2(JSOP_UNPICK, emitted + 2)) // ... OBJ ITER DONE *LREF RESULT DONE
return false;
}
IfThenElseEmitter ifDone(this);
- if (!ifDone.emitIfElse()) // ... OBJ ITER RESULT ?DONE
+ if (!ifDone.emitIfElse()) // ... OBJ ITER ?DONE *LREF RESULT
return false;
- if (hasNext) {
- if (!emit1(JSOP_SWAP)) // ... OBJ ITER ?DONE RESULT
- return false;
- }
- if (!emit1(JSOP_POP)) // ... OBJ ITER ?DONE
+ if (!emit1(JSOP_POP)) // ... OBJ ITER ?DONE *LREF
return false;
- if (!emit1(JSOP_UNDEFINED)) // ... OBJ ITER ?DONE UNDEF
+ if (!emit1(JSOP_UNDEFINED)) // ... OBJ ITER ?DONE *LREF UNDEF
return false;
- if (!emit1(JSOP_NOP_DESTRUCTURING)) // ... OBJ ITER ?DONE UNDEF
+ if (!emit1(JSOP_NOP_DESTRUCTURING)) // ... OBJ ITER ?DONE *LREF UNDEF
return false;
- if (!ifDone.emitElse()) // ... OBJ ITER RESULT ?DONE
+ if (!ifDone.emitElse()) // ... OBJ ITER ?DONE *LREF RESULT
return false;
- if (hasNext) {
- if (!emit1(JSOP_SWAP)) // ... OBJ ITER ?DONE RESULT
- return false;
- }
- if (!emitAtomOp(cx->names().value, JSOP_GETPROP)) // ... OBJ ITER ?DONE VALUE
+ if (!emitAtomOp(cx->names().value, JSOP_GETPROP)) // ... OBJ ITER ?DONE *LREF VALUE
return false;
if (!ifDone.emitEnd())
@@ -4937,13 +5022,16 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav
}
if (pndefault) {
- if (!emitDefault(pndefault, subpattern)) // ... OBJ ITER ?DONE VALUE
+ if (!emitDefault(pndefault, subpattern)) // ... OBJ ITER ?DONE *LREF VALUE
return false;
}
if (!isElision) {
- if (!emitDestructuringLHS(subpattern, flav)) // ... OBJ ITER ?DONE
+ if (!emitSetOrInitializeDestructuring(subpattern,
+ flav)) // ... OBJ ITER ?DONE
+ {
return false;
+ }
} else {
if (!emit1(JSOP_POP)) // ... OBJ ITER ?DONE
return false;
@@ -4975,27 +5063,43 @@ BytecodeEmitter::emitDestructuringOpsObject(ParseNode* pattern, DestructuringFla
return false;
for (ParseNode* member = pattern->pn_head; member; member = member->pn_next) {
- // Duplicate the value being destructured to use as a reference base.
- if (!emit1(JSOP_DUP)) // ... RHS RHS
+ ParseNode* subpattern;
+ if (member->isKind(PNK_MUTATEPROTO))
+ subpattern = member->pn_kid;
+ else
+ subpattern = member->pn_right;
+ ParseNode* lhs = subpattern;
+ if (lhs->isKind(PNK_ASSIGN))
+ lhs = lhs->pn_left;
+
+ size_t emitted;
+ if (!emitDestructuringLHSRef(lhs, &emitted)) // ... RHS *LREF
return false;
+ // Duplicate the value being destructured to use as a reference base.
+ if (emitted) {
+ if (!emitDupAt(emitted)) // ... RHS *LREF RHS
+ return false;
+ } else {
+ if (!emit1(JSOP_DUP)) // ... RHS RHS
+ return false;
+ }
+
// Now push the property name currently being matched, which is the
// current property name "label" on the left of a colon in the object
// initialiser.
bool needsGetElem = true;
- ParseNode* subpattern;
if (member->isKind(PNK_MUTATEPROTO)) {
- if (!emitAtomOp(cx->names().proto, JSOP_GETPROP)) // ... RHS PROP
+ if (!emitAtomOp(cx->names().proto, JSOP_GETPROP)) // ... RHS *LREF PROP
return false;
needsGetElem = false;
- subpattern = member->pn_kid;
} else {
MOZ_ASSERT(member->isKind(PNK_COLON) || member->isKind(PNK_SHORTHAND));
ParseNode* key = member->pn_left;
if (key->isKind(PNK_NUMBER)) {
- if (!emitNumberOp(key->pn_dval)) // ... RHS RHS KEY
+ if (!emitNumberOp(key->pn_dval)) // ... RHS *LREF RHS KEY
return false;
} else if (key->isKind(PNK_OBJECT_PROPERTY_NAME) || key->isKind(PNK_STRING)) {
PropertyName* name = key->pn_atom->asPropertyName();
@@ -5005,33 +5109,30 @@ BytecodeEmitter::emitDestructuringOpsObject(ParseNode* pattern, DestructuringFla
// as indexes for simplification of downstream analysis.
jsid id = NameToId(name);
if (id != IdToTypeId(id)) {
- if (!emitTree(key)) // ... RHS RHS KEY
+ if (!emitTree(key)) // ... RHS *LREF RHS KEY
return false;
} else {
- if (!emitAtomOp(name, JSOP_GETPROP)) // ...RHS PROP
+ if (!emitAtomOp(name, JSOP_GETPROP)) // ... RHS *LREF PROP
return false;
needsGetElem = false;
}
} else {
- if (!emitComputedPropertyName(key)) // ... RHS RHS KEY
+ if (!emitComputedPropertyName(key)) // ... RHS *LREF RHS KEY
return false;
}
-
- subpattern = member->pn_right;
}
// Get the property value if not done already.
- if (needsGetElem && !emitElemOpBase(JSOP_GETELEM)) // ... RHS PROP
+ if (needsGetElem && !emitElemOpBase(JSOP_GETELEM)) // ... RHS *LREF PROP
return false;
if (subpattern->isKind(PNK_ASSIGN)) {
- if (!emitDefault(subpattern->pn_right, subpattern->pn_left))
+ if (!emitDefault(subpattern->pn_right, lhs)) // ... RHS *LREF VALUE
return false;
- subpattern = subpattern->pn_left;
}
- // Destructure PROP per this member's subpattern.
- if (!emitDestructuringLHS(subpattern, flav))
+ // Destructure PROP per this member's lhs.
+ if (!emitSetOrInitializeDestructuring(subpattern, flav)) // ... RHS
return false;
}
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h
index f09b529ed..066c06672 100644
--- a/js/src/frontend/BytecodeEmitter.h
+++ b/js/src/frontend/BytecodeEmitter.h
@@ -609,7 +609,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter
// Emit bytecode to put operands for a JSOP_GETELEM/CALLELEM/SETELEM/DELELEM
// opcode onto the stack in the right order. In the case of SETELEM, the
// value to be assigned must already be pushed.
- enum class EmitElemOption { Get, Set, Call, IncDec, CompoundAssign };
+ enum class EmitElemOption { Get, Set, Call, IncDec, CompoundAssign, Ref };
MOZ_MUST_USE bool emitElemOperands(ParseNode* pn, EmitElemOption opts);
MOZ_MUST_USE bool emitElemOpBase(JSOp op);
@@ -642,10 +642,18 @@ struct MOZ_STACK_CLASS BytecodeEmitter
DestructuringAssignment
};
- // emitDestructuringLHS assumes the to-be-destructured value has been pushed on
- // the stack and emits code to destructure a single lhs expression (either a
- // name or a compound []/{} expression).
- MOZ_MUST_USE bool emitDestructuringLHS(ParseNode* target, DestructuringFlavor flav);
+ // emitDestructuringLHSRef emits the lhs expression's reference.
+ // If the lhs expression is object property |OBJ.prop|, it emits |OBJ|.
+ // If it's object element |OBJ[ELEM]|, it emits |OBJ| and |ELEM|.
+ // If there's nothing to evaluate for the reference, it emits nothing.
+ // |emitted| parameter receives the number of values pushed onto the stack.
+ MOZ_MUST_USE bool emitDestructuringLHSRef(ParseNode* target, size_t* emitted);
+
+ // emitSetOrInitializeDestructuring assumes the lhs expression's reference
+ // and the to-be-destructured value has been pushed on the stack. It emits
+ // code to destructure a single lhs expression (either a name or a compound
+ // []/{} expression).
+ MOZ_MUST_USE bool emitSetOrInitializeDestructuring(ParseNode* target, DestructuringFlavor flav);
// emitDestructuringOps assumes the to-be-destructured value has been
// pushed on the stack and emits code to destructure each part of a [] or
diff --git a/js/src/jit/BaselineCompiler.cpp b/js/src/jit/BaselineCompiler.cpp
index 4dcc10b61..2f0d41707 100644
--- a/js/src/jit/BaselineCompiler.cpp
+++ b/js/src/jit/BaselineCompiler.cpp
@@ -1147,7 +1147,7 @@ BaselineCompiler::emit_JSOP_PICK()
// after : A B D E C
// First, move value at -(amount + 1) into R0.
- int depth = -(GET_INT8(pc) + 1);
+ int32_t depth = -(GET_INT8(pc) + 1);
masm.loadValue(frame.addressOfStackValue(frame.peek(depth)), R0);
// Move the other values down.
@@ -1166,6 +1166,34 @@ BaselineCompiler::emit_JSOP_PICK()
}
bool
+BaselineCompiler::emit_JSOP_UNPICK()
+{
+ frame.syncStack(0);
+
+ // Pick takes the top of the stack value and moves it under the nth value.
+ // For instance, unpick 2:
+ // before: A B C D E
+ // after : A B E C D
+
+ // First, move value at -1 into R0.
+ masm.loadValue(frame.addressOfStackValue(frame.peek(-1)), R0);
+
+ // Move the other values up.
+ int32_t depth = -(GET_INT8(pc) + 1);
+ for (int32_t i = -1; i > depth; i--) {
+ Address source = frame.addressOfStackValue(frame.peek(i - 1));
+ Address dest = frame.addressOfStackValue(frame.peek(i));
+ masm.loadValue(source, R1);
+ masm.storeValue(R1, dest);
+ }
+
+ // Store R0 under the nth value.
+ Address dest = frame.addressOfStackValue(frame.peek(depth));
+ masm.storeValue(R0, dest);
+ return true;
+}
+
+bool
BaselineCompiler::emit_JSOP_GOTO()
{
frame.syncStack(0);
diff --git a/js/src/jit/BaselineCompiler.h b/js/src/jit/BaselineCompiler.h
index 77f4dd005..60dac0966 100644
--- a/js/src/jit/BaselineCompiler.h
+++ b/js/src/jit/BaselineCompiler.h
@@ -42,6 +42,7 @@ namespace jit {
_(JSOP_DUP2) \
_(JSOP_SWAP) \
_(JSOP_PICK) \
+ _(JSOP_UNPICK) \
_(JSOP_GOTO) \
_(JSOP_IFEQ) \
_(JSOP_IFNE) \
diff --git a/js/src/jit/IonBuilder.cpp b/js/src/jit/IonBuilder.cpp
index 2e7784ff4..c4df415a4 100644
--- a/js/src/jit/IonBuilder.cpp
+++ b/js/src/jit/IonBuilder.cpp
@@ -1563,6 +1563,7 @@ IonBuilder::traverseBytecode()
case JSOP_DUP:
case JSOP_DUP2:
case JSOP_PICK:
+ case JSOP_UNPICK:
case JSOP_SWAP:
case JSOP_SETARG:
case JSOP_SETLOCAL:
@@ -2017,6 +2018,10 @@ IonBuilder::inspectOpcode(JSOp op)
current->pick(-GET_INT8(pc));
return true;
+ case JSOP_UNPICK:
+ current->unpick(-GET_INT8(pc));
+ return true;
+
case JSOP_GETALIASEDVAR:
return jsop_getaliasedvar(EnvironmentCoordinate(pc));
diff --git a/js/src/jit/MIRGraph.cpp b/js/src/jit/MIRGraph.cpp
index 3a363a5bf..d6e0fa8ff 100644
--- a/js/src/jit/MIRGraph.cpp
+++ b/js/src/jit/MIRGraph.cpp
@@ -790,6 +790,19 @@ MBasicBlock::pick(int32_t depth)
}
void
+MBasicBlock::unpick(int32_t depth)
+{
+ // unpick take the top of the stack element and move it under the depth-th
+ // element;
+ // unpick(-2):
+ // A B C D E
+ // A B C E D [ swapAt(-1) ]
+ // A B E C D [ swapAt(-2) ]
+ for (int32_t n = -1; n >= depth; n--)
+ swapAt(n);
+}
+
+void
MBasicBlock::swapAt(int32_t depth)
{
uint32_t lhsDepth = stackPosition_ + depth - 1;
diff --git a/js/src/jit/MIRGraph.h b/js/src/jit/MIRGraph.h
index b986218f4..705d70fa1 100644
--- a/js/src/jit/MIRGraph.h
+++ b/js/src/jit/MIRGraph.h
@@ -142,6 +142,9 @@ class MBasicBlock : public TempObject, public InlineListNode<MBasicBlock>
// Move the definition to the top of the stack.
void pick(int32_t depth);
+ // Move the top of the stack definition under the depth-th stack value.
+ void unpick(int32_t depth);
+
// Exchange 2 stack slots at the defined depth
void swapAt(int32_t depth);
diff --git a/js/src/tests/ecma_6/Destructuring/order-super.js b/js/src/tests/ecma_6/Destructuring/order-super.js
new file mode 100644
index 000000000..afe11e2d9
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/order-super.js
@@ -0,0 +1,727 @@
+var BUGNUMBER = 1204028;
+var summary = "Destructuring should evaluate lhs reference before rhs in super property";
+
+if (typeof assertEq === "undefined") {
+ assertEq = function(a, b) {
+ if (a !== b)
+ throw new Error(`expected ${b}, got ${a}\n${new Error().stack}`);
+ };
+}
+
+print(BUGNUMBER + ": " + summary);
+
+let logs = [];
+function log(x) {
+ logs.push(x);
+}
+
+let unwrapMap = new Map();
+function unwrap(maybeWrapped) {
+ if (unwrapMap.has(maybeWrapped))
+ return unwrapMap.get(maybeWrapped);
+ return maybeWrapped;
+}
+function ToString(name) {
+ if (name == Symbol.iterator)
+ return "@@iterator";
+ return String(name);
+}
+function logger(obj, prefix=[]) {
+ let wrapped = new Proxy(obj, {
+ get(that, name) {
+ if (name == "return") {
+ // FIXME: Bug 1147371.
+ // We ignore IteratorClose for now.
+ return obj[name];
+ }
+
+ let names = prefix.concat(ToString(name));
+ log("rhs get " + names.join("::"));
+ let v = obj[name];
+ if (typeof v === "object" || typeof v === "function")
+ return logger(v, names);
+ return v;
+ },
+ apply(that, thisArg, args) {
+ let names = prefix.slice();
+ log("rhs call " + names.join("::"));
+ let v = obj.apply(unwrap(thisArg), args);
+ if (typeof v === "object" || typeof v === "function") {
+ names[names.length - 1] += "()";
+ return logger(v, names);
+ }
+ return v;
+ }
+ });
+ unwrapMap.set(wrapped, obj);
+ return wrapped;
+}
+
+class C1 {
+ constructor() {
+ this.clear();
+ }
+ clear() {
+ this.values = {};
+ }
+}
+for (let name of [
+ "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
+ "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
+ "0", "1", "length"
+]) {
+ Object.defineProperty(C1.prototype, name, {
+ set: function(value) {
+ log("lhs set " + name);
+ this.values[name] = value;
+ }
+ });
+}
+class C2 extends C1 {
+ constructor() {
+ super();
+
+ let clear = () => {
+ logs = [];
+ this.clear();
+ };
+
+ // Array.
+
+ clear();
+ [
+ super.a
+ ] = logger(["A"]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a, "A");
+
+ clear();
+ [
+ super[ (log("lhs before name a"), "a") ]
+ ] = logger(["A"]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before name a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a, "A");
+
+ // Array rest.
+
+ clear();
+ [
+ ...super.a
+ ] = logger(["A", "B", "C"]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a.join(","), "A,B,C");
+
+ clear();
+ [
+ ...super[ (log("lhs before name a"), "a") ]
+ ] = logger(["A", "B", "C"]);;
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before name a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a.join(","), "A,B,C");
+
+ // Array combined.
+
+ clear();
+ [
+ super.a,
+ super[ (log("lhs before name b"), "b") ],
+ ...super[ (log("lhs before name c"), "c") ]
+ ] = logger(["A", "B", "C"]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+
+ "lhs before name b",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set b",
+
+ "lhs before name c",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "lhs set c",
+ ].join(","));
+ assertEq(this.values.a, "A");
+ assertEq(this.values.b, "B");
+ assertEq(this.values.c.join(","), "C");
+
+ // Object.
+
+ clear();
+ ({
+ a: super.a
+ } = logger({a: "A"}));
+ assertEq(logs.join(","),
+ [
+ "rhs get a",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a, "A");
+
+ clear();
+ ({
+ a: super[ (log("lhs before name a"), "a") ]
+ } = logger({a: "A"}));
+ assertEq(logs.join(","),
+ [
+ "lhs before name a",
+ "rhs get a",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a, "A");
+
+ // Object combined.
+
+ clear();
+ ({
+ a: super.a,
+ b: super[ (log("lhs before name b"), "b") ]
+ } = logger({a: "A", b: "B"}));
+ assertEq(logs.join(","),
+ [
+ "rhs get a",
+ "lhs set a",
+
+ "lhs before name b",
+ "rhs get b",
+ "lhs set b",
+ ].join(","));
+ assertEq(this.values.a, "A");
+ assertEq(this.values.b, "B");
+
+ // == Nested ==
+
+ // Array -> Array
+
+ clear();
+ [
+ [
+ super[ (log("lhs before name a"), "a") ],
+ ...super[ (log("lhs before name b"), "b") ]
+ ]
+ ] = logger([["A", "B"]]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before name a",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set a",
+
+ "lhs before name b",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "lhs set b",
+ ].join(","));
+ assertEq(this.values.a, "A");
+ assertEq(this.values.b.length, 1);
+ assertEq(this.values.b[0], "B");
+
+ // Array rest -> Array
+
+ clear();
+ [
+ ...[
+ super[ (log("lhs before name a"), "a") ],
+ ...super[ (log("lhs before name b"), "b") ]
+ ]
+ ] = logger(["A", "B"]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+
+ "lhs before name a",
+ "lhs set a",
+
+ "lhs before name b",
+ "lhs set b",
+ ].join(","));
+ assertEq(this.values.a, "A");
+ assertEq(this.values.b.join(","), "B");
+
+ // Array -> Object
+ clear();
+ [
+ {
+ a: super[ (log("lhs before name a"), "a") ]
+ }
+ ] = logger([{a: "A"}]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+
+ "lhs before name a",
+ "rhs get @@iterator()::next()::value::a",
+ "lhs set a",
+ ].join(","));
+ assertEq(this.values.a, "A");
+
+ // Array rest -> Object
+ clear();
+ [
+ ...{
+ 0: super[ (log("lhs before name 0"), "0") ],
+ 1: super[ (log("lhs before name 1"), "1") ],
+ length: super[ (log("lhs before name length"), "length") ],
+ }
+ ] = logger(["A", "B"]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+
+ "lhs before name 0",
+ "lhs set 0",
+
+ "lhs before name 1",
+ "lhs set 1",
+
+ "lhs before name length",
+ "lhs set length",
+ ].join(","));
+ assertEq(this.values["0"], "A");
+ assertEq(this.values["1"], "B");
+ assertEq(this.values.length, 2);
+
+ // Object -> Array
+ clear();
+ ({
+ a: [
+ super[ (log("lhs before name b"), "b") ]
+ ]
+ } = logger({a: ["B"]}));
+ assertEq(logs.join(","),
+ [
+ "rhs get a",
+ "rhs get a::@@iterator",
+ "rhs call a::@@iterator",
+
+ "lhs before name b",
+ "rhs get a::@@iterator()::next",
+ "rhs call a::@@iterator()::next",
+ "rhs get a::@@iterator()::next()::done",
+ "rhs get a::@@iterator()::next()::value",
+ "lhs set b",
+ ].join(","));
+ assertEq(this.values.b, "B");
+
+ // Object -> Object
+ clear();
+ ({
+ a: {
+ b: super[ (log("lhs before name b"), "b") ]
+ }
+ } = logger({a: {b: "B"}}));
+ assertEq(logs.join(","),
+ [
+ "rhs get a",
+ "lhs before name b",
+ "rhs get a::b",
+ "lhs set b",
+ ].join(","));
+ assertEq(this.values.b, "B");
+
+ // All combined
+
+ clear();
+ [
+ super[ (log("lhs before name a"), "a") ],
+ [
+ super[ (log("lhs before name b"), "b") ],
+ {
+ c: super[ (log("lhs before name c"), "c") ],
+ d: {
+ e: super[ (log("lhs before name e"), "e") ],
+ f: [
+ super[ (log("lhs before name g"), "g") ]
+ ]
+ }
+ }
+ ],
+ {
+ h: super[ (log("lhs before name h"), "h") ],
+ i: [
+ super[ (log("lhs before name j"), "j") ],
+ {
+ k: [
+ super[ (log("lhs before name l"), "l") ]
+ ]
+ }
+ ]
+ },
+ ...[
+ super[ (log("lhs before name m"), "m") ],
+ [
+ super[ (log("lhs before name n"), "n") ],
+ {
+ o: super[ (log("lhs before name o"), "o") ],
+ p: {
+ q: super[ (log("lhs before name q"), "q") ],
+ r: [
+ super[ (log("lhs before name s"), "s") ]
+ ]
+ }
+ }
+ ],
+ ...{
+ 0: super[ (log("lhs before name t"), "t") ],
+ 1: [
+ super[ (log("lhs before name u"), "u") ],
+ {
+ v: super[ (log("lhs before name v"), "v") ],
+ w: {
+ x: super[ (log("lhs before name x"), "x") ],
+ y: [
+ super[ (log("lhs before name z"), "z") ]
+ ]
+ }
+ }
+ ],
+ length: super[ (log("lhs before name length"), "length") ],
+ }
+ ]
+ ] = logger(["A",
+ ["B", {c: "C", d: {e: "E", f: ["G"]}}],
+ {h: "H", i: ["J", {k: ["L"]}]},
+ "M",
+ ["N", {o: "O", p: {q: "Q", r: ["S"]}}],
+ "T", ["U", {v: "V", w: {x: "X", y: ["Z"]}}]]);
+ assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before name a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before name b",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set b",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+ "lhs before name c",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::c",
+ "lhs set c",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d",
+
+ "lhs before name e",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::e",
+ "lhs set e",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+
+ "lhs before name g",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::value",
+ "lhs set g",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+
+ "lhs before name h",
+ "rhs get @@iterator()::next()::value::h",
+ "lhs set h",
+
+ "rhs get @@iterator()::next()::value::i",
+ "rhs get @@iterator()::next()::value::i::@@iterator",
+ "rhs call @@iterator()::next()::value::i::@@iterator",
+
+ "lhs before name j",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+ "lhs set j",
+
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+
+ "lhs before name l",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::value",
+ "lhs set l",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+
+ "lhs before name m",
+ "lhs set m",
+
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before name n",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set n",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+ "lhs before name o",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::o",
+ "lhs set o",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p",
+
+ "lhs before name q",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::q",
+ "lhs set q",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+
+ "lhs before name s",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::value",
+ "lhs set s",
+
+ "lhs before name t",
+ "lhs set t",
+
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before name u",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set u",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+ "lhs before name v",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::v",
+ "lhs set v",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w",
+
+ "lhs before name x",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::x",
+ "lhs set x",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+
+ "lhs before name z",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::value",
+ "lhs set z",
+
+ "lhs before name length",
+ "lhs set length",
+ ].join(","));
+ assertEq(this.values.a, "A");
+ assertEq(this.values.b, "B");
+ assertEq(this.values.c, "C");
+ assertEq(this.values.e, "E");
+ assertEq(this.values.g, "G");
+ assertEq(this.values.h, "H");
+ assertEq(this.values.j, "J");
+ assertEq(this.values.l, "L");
+ assertEq(this.values.m, "M");
+ assertEq(this.values.n, "N");
+ assertEq(this.values.o, "O");
+ assertEq(this.values.q, "Q");
+ assertEq(this.values.s, "S");
+ assertEq(this.values.t, "T");
+ assertEq(this.values.u, "U");
+ assertEq(this.values.v, "V");
+ assertEq(this.values.x, "X");
+ assertEq(this.values.z, "Z");
+ assertEq(this.values.length, 2);
+ }
+}
+
+new C2();
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Destructuring/order.js b/js/src/tests/ecma_6/Destructuring/order.js
new file mode 100644
index 000000000..4eb48cd2b
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/order.js
@@ -0,0 +1,745 @@
+var BUGNUMBER = 1204028;
+var summary = "Destructuring should evaluate lhs reference before rhs";
+
+print(BUGNUMBER + ": " + summary);
+
+let storage = {
+ clear() {
+ this.values = {};
+ }
+};
+storage.clear();
+let obj = new Proxy(storage, {
+ set(that, name, value) {
+ log("lhs set " + name);
+ storage.values[name] = value;
+ }
+});
+
+let logs = [];
+function log(x) {
+ logs.push(x);
+}
+
+function clear() {
+ logs = [];
+ storage.clear();
+}
+
+let unwrapMap = new Map();
+function unwrap(maybeWrapped) {
+ if (unwrapMap.has(maybeWrapped))
+ return unwrapMap.get(maybeWrapped);
+ return maybeWrapped;
+}
+function ToString(name) {
+ if (name == Symbol.iterator)
+ return "@@iterator";
+ return String(name);
+}
+function logger(obj, prefix=[]) {
+ let wrapped = new Proxy(obj, {
+ get(that, name) {
+ if (name == "return") {
+ // FIXME: Bug 1147371.
+ // We ignore IteratorClose for now.
+ return obj[name];
+ }
+
+ let names = prefix.concat(ToString(name));
+ log("rhs get " + names.join("::"));
+ let v = obj[name];
+ if (typeof v === "object" || typeof v === "function")
+ return logger(v, names);
+ return v;
+ },
+ apply(that, thisArg, args) {
+ let names = prefix.slice();
+ log("rhs call " + names.join("::"));
+ let v = obj.apply(unwrap(thisArg), args);
+ if (typeof v === "object" || typeof v === "function") {
+ names[names.length - 1] += "()";
+ return logger(v, names);
+ }
+ return v;
+ }
+ });
+ unwrapMap.set(wrapped, obj);
+ return wrapped;
+}
+
+// Array.
+
+clear();
+[
+ ( log("lhs before obj a"), obj ).a
+] = logger(["A"]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before obj a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a, "A");
+
+clear();
+[
+ ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+] = logger(["A"]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before obj a",
+ "lhs before name a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a, "A");
+
+// Array rest.
+
+clear();
+[
+ ...( log("lhs before obj a"), obj ).a
+] = logger(["A", "B", "C"]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before obj a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a.join(","), "A,B,C");
+
+clear();
+[
+ ...( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+] = logger(["A", "B", "C"]);;
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before obj a",
+ "lhs before name a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a.join(","), "A,B,C");
+
+// Array combined.
+
+clear();
+[
+ ( log("lhs before obj a"), obj ).a,
+ ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ],
+ ...( log("lhs before obj c"), obj )[ (log("lhs before name c"), "c") ]
+] = logger(["A", "B", "C"]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before obj a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+
+ "lhs before obj b",
+ "lhs before name b",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set b",
+
+ "lhs before obj c",
+ "lhs before name c",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "lhs set c",
+ ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b, "B");
+assertEq(storage.values.c.join(","), "C");
+
+// Object.
+
+clear();
+({
+ a: ( log("lhs before obj a"), obj ).a
+} = logger({a: "A"}));
+assertEq(logs.join(","),
+ [
+ "lhs before obj a",
+ "rhs get a",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a, "A");
+
+clear();
+({
+ a: ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+} = logger({a: "A"}));
+assertEq(logs.join(","),
+ [
+ "lhs before obj a",
+ "lhs before name a",
+ "rhs get a",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a, "A");
+
+// Object combined.
+
+clear();
+({
+ a: ( log("lhs before obj a"), obj ).a,
+ b: ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+} = logger({a: "A", b: "B"}));
+assertEq(logs.join(","),
+ [
+ "lhs before obj a",
+ "rhs get a",
+ "lhs set a",
+
+ "lhs before obj b",
+ "lhs before name b",
+ "rhs get b",
+ "lhs set b",
+ ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b, "B");
+
+// == Nested ==
+
+// Array -> Array
+
+clear();
+[
+ [
+ ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ],
+ ...( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+ ]
+] = logger([["A", "B"]]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before obj a",
+ "lhs before name a",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set a",
+
+ "lhs before obj b",
+ "lhs before name b",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "lhs set b",
+ ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b.length, 1);
+assertEq(storage.values.b[0], "B");
+
+// Array rest -> Array
+
+clear();
+[
+ ...[
+ ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ],
+ ...( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+ ]
+] = logger(["A", "B"]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+
+ "lhs before obj a",
+ "lhs before name a",
+ "lhs set a",
+
+ "lhs before obj b",
+ "lhs before name b",
+ "lhs set b",
+ ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b.join(","), "B");
+
+// Array -> Object
+clear();
+[
+ {
+ a: ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+ }
+] = logger([{a: "A"}]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+
+ "lhs before obj a",
+ "lhs before name a",
+ "rhs get @@iterator()::next()::value::a",
+ "lhs set a",
+ ].join(","));
+assertEq(storage.values.a, "A");
+
+// Array rest -> Object
+clear();
+[
+ ...{
+ 0: ( log("lhs before obj 0"), obj )[ (log("lhs before name 0"), "0") ],
+ 1: ( log("lhs before obj 1"), obj )[ (log("lhs before name 1"), "1") ],
+ length: ( log("lhs before obj length"), obj )[ (log("lhs before name length"), "length") ],
+ }
+] = logger(["A", "B"]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+
+ "lhs before obj 0",
+ "lhs before name 0",
+ "lhs set 0",
+
+ "lhs before obj 1",
+ "lhs before name 1",
+ "lhs set 1",
+
+ "lhs before obj length",
+ "lhs before name length",
+ "lhs set length",
+ ].join(","));
+assertEq(storage.values["0"], "A");
+assertEq(storage.values["1"], "B");
+assertEq(storage.values.length, 2);
+
+// Object -> Array
+clear();
+({
+ a: [
+ ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+ ]
+} = logger({a: ["B"]}));
+assertEq(logs.join(","),
+ [
+ "rhs get a",
+ "rhs get a::@@iterator",
+ "rhs call a::@@iterator",
+
+ "lhs before obj b",
+ "lhs before name b",
+ "rhs get a::@@iterator()::next",
+ "rhs call a::@@iterator()::next",
+ "rhs get a::@@iterator()::next()::done",
+ "rhs get a::@@iterator()::next()::value",
+ "lhs set b",
+ ].join(","));
+assertEq(storage.values.b, "B");
+
+// Object -> Object
+clear();
+({
+ a: {
+ b: ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+ }
+} = logger({a: {b: "B"}}));
+assertEq(logs.join(","),
+ [
+ "rhs get a",
+ "lhs before obj b",
+ "lhs before name b",
+ "rhs get a::b",
+ "lhs set b",
+ ].join(","));
+assertEq(storage.values.b, "B");
+
+// All combined
+
+clear();
+[
+ ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ],
+ [
+ ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ],
+ {
+ c: ( log("lhs before obj c"), obj )[ (log("lhs before name c"), "c") ],
+ d: {
+ e: ( log("lhs before obj e"), obj )[ (log("lhs before name e"), "e") ],
+ f: [
+ ( log("lhs before obj g"), obj )[ (log("lhs before name g"), "g") ]
+ ]
+ }
+ }
+ ],
+ {
+ h: ( log("lhs before obj h"), obj )[ (log("lhs before name h"), "h") ],
+ i: [
+ ( log("lhs before obj j"), obj )[ (log("lhs before name j"), "j") ],
+ {
+ k: [
+ ( log("lhs before obj l"), obj )[ (log("lhs before name l"), "l") ]
+ ]
+ }
+ ]
+ },
+ ...[
+ ( log("lhs before obj m"), obj )[ (log("lhs before name m"), "m") ],
+ [
+ ( log("lhs before obj n"), obj )[ (log("lhs before name n"), "n") ],
+ {
+ o: ( log("lhs before obj o"), obj )[ (log("lhs before name o"), "o") ],
+ p: {
+ q: ( log("lhs before obj q"), obj )[ (log("lhs before name q"), "q") ],
+ r: [
+ ( log("lhs before obj s"), obj )[ (log("lhs before name s"), "s") ]
+ ]
+ }
+ }
+ ],
+ ...{
+ 0: ( log("lhs before obj t"), obj )[ (log("lhs before name t"), "t") ],
+ 1: [
+ ( log("lhs before obj u"), obj )[ (log("lhs before name u"), "u") ],
+ {
+ v: ( log("lhs before obj v"), obj )[ (log("lhs before name v"), "v") ],
+ w: {
+ x: ( log("lhs before obj x"), obj )[ (log("lhs before name x"), "x") ],
+ y: [
+ ( log("lhs before obj z"), obj )[ (log("lhs before name z"), "z") ]
+ ]
+ }
+ }
+ ],
+ length: ( log("lhs before obj length"), obj )[ (log("lhs before name length"), "length") ],
+ }
+ ]
+] = logger(["A",
+ ["B", {c: "C", d: {e: "E", f: ["G"]}}],
+ {h: "H", i: ["J", {k: ["L"]}]},
+ "M",
+ ["N", {o: "O", p: {q: "Q", r: ["S"]}}],
+ "T", ["U", {v: "V", w: {x: "X", y: ["Z"]}}]]);
+assertEq(logs.join(","),
+ [
+ "rhs get @@iterator",
+ "rhs call @@iterator",
+
+ "lhs before obj a",
+ "lhs before name a",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "lhs set a",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before obj b",
+ "lhs before name b",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set b",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+ "lhs before obj c",
+ "lhs before name c",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::c",
+ "lhs set c",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d",
+
+ "lhs before obj e",
+ "lhs before name e",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::e",
+ "lhs set e",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+
+ "lhs before obj g",
+ "lhs before name g",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::value",
+ "lhs set g",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+
+ "lhs before obj h",
+ "lhs before name h",
+ "rhs get @@iterator()::next()::value::h",
+ "lhs set h",
+
+ "rhs get @@iterator()::next()::value::i",
+ "rhs get @@iterator()::next()::value::i::@@iterator",
+ "rhs call @@iterator()::next()::value::i::@@iterator",
+
+ "lhs before obj j",
+ "lhs before name j",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+ "lhs set j",
+
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+
+ "lhs before obj l",
+ "lhs before name l",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::value",
+ "lhs set l",
+
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value",
+ "rhs get @@iterator()::next",
+ "rhs call @@iterator()::next",
+ "rhs get @@iterator()::next()::done",
+
+ "lhs before obj m",
+ "lhs before name m",
+ "lhs set m",
+
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before obj n",
+ "lhs before name n",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set n",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+ "lhs before obj o",
+ "lhs before name o",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::o",
+ "lhs set o",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p",
+
+ "lhs before obj q",
+ "lhs before name q",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::q",
+ "lhs set q",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+
+ "lhs before obj s",
+ "lhs before name s",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::value",
+ "lhs set s",
+
+ "lhs before obj t",
+ "lhs before name t",
+ "lhs set t",
+
+ "rhs get @@iterator()::next()::value::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator",
+
+ "lhs before obj u",
+ "lhs before name u",
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+ "lhs set u",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+ "lhs before obj v",
+ "lhs before name v",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::v",
+ "lhs set v",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w",
+
+ "lhs before obj x",
+ "lhs before name x",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::x",
+ "lhs set x",
+
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+
+ "lhs before obj z",
+ "lhs before name z",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+ "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::done",
+ "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::value",
+ "lhs set z",
+
+ "lhs before obj length",
+ "lhs before name length",
+ "lhs set length",
+ ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b, "B");
+assertEq(storage.values.c, "C");
+assertEq(storage.values.e, "E");
+assertEq(storage.values.g, "G");
+assertEq(storage.values.h, "H");
+assertEq(storage.values.j, "J");
+assertEq(storage.values.l, "L");
+assertEq(storage.values.m, "M");
+assertEq(storage.values.n, "N");
+assertEq(storage.values.o, "O");
+assertEq(storage.values.q, "Q");
+assertEq(storage.values.s, "S");
+assertEq(storage.values.t, "T");
+assertEq(storage.values.u, "U");
+assertEq(storage.values.v, "V");
+assertEq(storage.values.x, "X");
+assertEq(storage.values.z, "Z");
+assertEq(storage.values.length, 2);
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);
diff --git a/js/src/vm/Interpreter.cpp b/js/src/vm/Interpreter.cpp
index 9cba1f4dc..8ae9c43b0 100644
--- a/js/src/vm/Interpreter.cpp
+++ b/js/src/vm/Interpreter.cpp
@@ -1860,7 +1860,6 @@ CASE(EnableInterruptsPseudoOpcode)
/* Various 1-byte no-ops. */
CASE(JSOP_NOP)
CASE(JSOP_NOP_DESTRUCTURING)
-CASE(JSOP_UNUSED183)
CASE(JSOP_UNUSED187)
CASE(JSOP_UNUSED192)
CASE(JSOP_UNUSED209)
@@ -2193,6 +2192,16 @@ CASE(JSOP_PICK)
}
END_CASE(JSOP_PICK)
+CASE(JSOP_UNPICK)
+{
+ int i = GET_UINT8(REGS.pc);
+ MOZ_ASSERT(REGS.stackDepth() >= unsigned(i) + 1);
+ Value lval = REGS.sp[-1];
+ memmove(REGS.sp - i, REGS.sp - (i + 1), sizeof(Value) * i);
+ REGS.sp[-(i + 1)] = lval;
+}
+END_CASE(JSOP_UNPICK)
+
CASE(JSOP_BINDGNAME)
CASE(JSOP_BINDNAME)
{
diff --git a/js/src/vm/Opcodes.h b/js/src/vm/Opcodes.h
index f6636004d..b59b9388c 100644
--- a/js/src/vm/Opcodes.h
+++ b/js/src/vm/Opcodes.h
@@ -1880,8 +1880,14 @@
* Stack: fun, name => fun
*/ \
macro(JSOP_SETFUNNAME, 182,"setfunname", NULL, 2, 2, 1, JOF_UINT8) \
- macro(JSOP_UNUSED183, 183,"unused183", NULL, 1, 0, 0, JOF_BYTE) \
- \
+ /*
+ * Moves the top of the stack value under the nth element of the stack.
+ * Category: Operators
+ * Type: Stack Operations
+ * Operands: uint8_t n
+ * Stack: v[n], v[n-1], ..., v[1], v[0] => v[0], v[n], v[n-1], ..., v[1]
+ */ \
+ macro(JSOP_UNPICK, 183,"unpick", NULL, 2, 0, 0, JOF_UINT8) \
/*
* Pops the top of stack value, pushes property of it onto the stack.
*
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 12:49:27 +0000