diff options
Diffstat (limited to 'js/src/frontend/BytecodeEmitter.h')
| -rw-r--r-- | js/src/frontend/BytecodeEmitter.h | 54 |
1 files changed, 38 insertions, 16 deletions
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h index 1bb4191ee..04307c8c1 100644 --- a/js/src/frontend/BytecodeEmitter.h +++ b/js/src/frontend/BytecodeEmitter.h @@ -43,12 +43,10 @@ class CGConstList { struct CGObjectList { uint32_t length; /* number of emitted so far objects */ - ObjectBox* firstbox; /* first emitted object */ ObjectBox* lastbox; /* last emitted object */ - CGObjectList() : length(0), firstbox(nullptr), lastbox(nullptr) {} + CGObjectList() : length(0), lastbox(nullptr) {} - bool isAdded(ObjectBox* objbox); unsigned add(ObjectBox* objbox); unsigned indexOf(JSObject* obj); void finish(ObjectArray* array); @@ -102,7 +100,9 @@ struct CGScopeNoteList { struct CGYieldOffsetList { Vector<uint32_t> list; - explicit CGYieldOffsetList(ExclusiveContext* cx) : list(cx) {} + uint32_t numYields; + uint32_t numAwaits; + explicit CGYieldOffsetList(ExclusiveContext* cx) : list(cx), numYields(0), numAwaits(0) {} MOZ_MUST_USE bool append(uint32_t offset) { return list.append(offset); } size_t length() const { return list.length(); } @@ -435,7 +435,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter MOZ_MUST_USE bool emitTree(ParseNode* pn, EmitLineNumberNote emitLineNote = EMIT_LINENOTE); // Emit code for the tree rooted at pn with its own TDZ cache. - MOZ_MUST_USE bool emitConditionallyExecutedTree(ParseNode* pn); + MOZ_MUST_USE bool emitTreeInBranch(ParseNode* pn); // Emit global, eval, or module code for tree rooted at body. Always // encompasses the entire source. @@ -454,8 +454,6 @@ struct MOZ_STACK_CLASS BytecodeEmitter JSOp strictifySetNameOp(JSOp op); - MOZ_MUST_USE bool flushPops(int* npops); - MOZ_MUST_USE bool emitCheck(ptrdiff_t delta, ptrdiff_t* offset); // Emit one bytecode. @@ -475,6 +473,9 @@ struct MOZ_STACK_CLASS BytecodeEmitter // Helper to emit JSOP_CHECKISOBJ. MOZ_MUST_USE bool emitCheckIsObj(CheckIsObjectKind kind); + // Helper to emit JSOP_CHECKISCALLABLE. + MOZ_MUST_USE bool emitCheckIsCallable(CheckIsCallableKind kind); + // Emit a bytecode followed by an uint16 immediate operand stored in // big-endian order. MOZ_MUST_USE bool emitUint16Operand(JSOp op, uint32_t operand); @@ -611,7 +612,7 @@ 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); @@ -644,12 +645,18 @@ 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); - MOZ_MUST_USE bool emitConditionallyExecutedDestructuringLHS(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 @@ -675,10 +682,25 @@ struct MOZ_STACK_CLASS BytecodeEmitter // Pops iterator from the top of the stack. Pushes the result of |.next()| // onto the stack. MOZ_MUST_USE bool emitIteratorNext(ParseNode* pn, bool allowSelfHosted = false); + MOZ_MUST_USE bool emitIteratorClose(CompletionKind completionKind = CompletionKind::Normal, + bool allowSelfHosted = false); + + template <typename InnerEmitter> + MOZ_MUST_USE bool wrapWithDestructuringIteratorCloseTryNote(int32_t iterDepth, + InnerEmitter emitter); // Check if the value on top of the stack is "undefined". If so, replace // that value on the stack with the value defined by |defaultExpr|. - MOZ_MUST_USE bool emitDefault(ParseNode* defaultExpr); + // |pattern| is a lhs node of the default expression. If it's an + // identifier and |defaultExpr| is an anonymous function, |SetFunctionName| + // is called at compile time. + MOZ_MUST_USE bool emitDefault(ParseNode* defaultExpr, ParseNode* pattern); + + MOZ_MUST_USE bool setOrEmitSetFunName(ParseNode* maybeFun, HandleAtom name, + FunctionPrefixKind prefixKind); + + MOZ_MUST_USE bool emitInitializer(ParseNode* initializer, ParseNode* pattern); + MOZ_MUST_USE bool emitInitializerInBranch(ParseNode* initializer, ParseNode* pattern); MOZ_MUST_USE bool emitCallSiteObject(ParseNode* pn); MOZ_MUST_USE bool emitTemplateString(ParseNode* pn); @@ -713,7 +735,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter MOZ_MUST_USE bool emitSelfHostedCallFunction(ParseNode* pn); MOZ_MUST_USE bool emitSelfHostedResumeGenerator(ParseNode* pn); MOZ_MUST_USE bool emitSelfHostedForceInterpreter(ParseNode* pn); - MOZ_MUST_USE bool emitSelfHostedAllowContentSpread(ParseNode* pn); + MOZ_MUST_USE bool emitSelfHostedAllowContentIter(ParseNode* pn); MOZ_MUST_USE bool emitComprehensionFor(ParseNode* compFor); MOZ_MUST_USE bool emitComprehensionForIn(ParseNode* pn); |