| // Copyright 2010 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_FULL_CODEGEN_H_ |
| #define V8_FULL_CODEGEN_H_ |
| |
| #include "v8.h" |
| |
| #include "ast.h" |
| #include "code-stubs.h" |
| #include "codegen.h" |
| #include "compiler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Forward declarations. |
| class JumpPatchSite; |
| |
| // AST node visitor which can tell whether a given statement will be breakable |
| // when the code is compiled by the full compiler in the debugger. This means |
| // that there will be an IC (load/store/call) in the code generated for the |
| // debugger to piggybag on. |
| class BreakableStatementChecker: public AstVisitor { |
| public: |
| BreakableStatementChecker() : is_breakable_(false) {} |
| |
| void Check(Statement* stmt); |
| void Check(Expression* stmt); |
| |
| bool is_breakable() { return is_breakable_; } |
| |
| private: |
| // AST node visit functions. |
| #define DECLARE_VISIT(type) virtual void Visit##type(type* node); |
| AST_NODE_LIST(DECLARE_VISIT) |
| #undef DECLARE_VISIT |
| |
| bool is_breakable_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BreakableStatementChecker); |
| }; |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Full code generator. |
| |
| class FullCodeGenerator: public AstVisitor { |
| public: |
| enum State { |
| NO_REGISTERS, |
| TOS_REG |
| }; |
| |
| explicit FullCodeGenerator(MacroAssembler* masm) |
| : masm_(masm), |
| info_(NULL), |
| nesting_stack_(NULL), |
| loop_depth_(0), |
| context_(NULL), |
| bailout_entries_(0), |
| stack_checks_(2), // There's always at least one. |
| forward_bailout_stack_(NULL), |
| forward_bailout_pending_(NULL) { |
| } |
| |
| static bool MakeCode(CompilationInfo* info); |
| |
| void Generate(CompilationInfo* info); |
| void PopulateDeoptimizationData(Handle<Code> code); |
| |
| class StateField : public BitField<State, 0, 8> { }; |
| class PcField : public BitField<unsigned, 8, 32-8> { }; |
| |
| static const char* State2String(State state) { |
| switch (state) { |
| case NO_REGISTERS: return "NO_REGISTERS"; |
| case TOS_REG: return "TOS_REG"; |
| } |
| UNREACHABLE(); |
| return NULL; |
| } |
| |
| private: |
| class Breakable; |
| class Iteration; |
| class TryCatch; |
| class TryFinally; |
| class Finally; |
| class ForIn; |
| |
| class NestedStatement BASE_EMBEDDED { |
| public: |
| explicit NestedStatement(FullCodeGenerator* codegen) : codegen_(codegen) { |
| // Link into codegen's nesting stack. |
| previous_ = codegen->nesting_stack_; |
| codegen->nesting_stack_ = this; |
| } |
| virtual ~NestedStatement() { |
| // Unlink from codegen's nesting stack. |
| ASSERT_EQ(this, codegen_->nesting_stack_); |
| codegen_->nesting_stack_ = previous_; |
| } |
| |
| virtual Breakable* AsBreakable() { return NULL; } |
| virtual Iteration* AsIteration() { return NULL; } |
| virtual TryCatch* AsTryCatch() { return NULL; } |
| virtual TryFinally* AsTryFinally() { return NULL; } |
| virtual Finally* AsFinally() { return NULL; } |
| virtual ForIn* AsForIn() { return NULL; } |
| |
| virtual bool IsContinueTarget(Statement* target) { return false; } |
| virtual bool IsBreakTarget(Statement* target) { return false; } |
| |
| // Generate code to leave the nested statement. This includes |
| // cleaning up any stack elements in use and restoring the |
| // stack to the expectations of the surrounding statements. |
| // Takes a number of stack elements currently on top of the |
| // nested statement's stack, and returns a number of stack |
| // elements left on top of the surrounding statement's stack. |
| // The generated code must preserve the result register (which |
| // contains the value in case of a return). |
| virtual int Exit(int stack_depth) { |
| // Default implementation for the case where there is |
| // nothing to clean up. |
| return stack_depth; |
| } |
| NestedStatement* outer() { return previous_; } |
| protected: |
| MacroAssembler* masm() { return codegen_->masm(); } |
| private: |
| FullCodeGenerator* codegen_; |
| NestedStatement* previous_; |
| DISALLOW_COPY_AND_ASSIGN(NestedStatement); |
| }; |
| |
| class Breakable : public NestedStatement { |
| public: |
| Breakable(FullCodeGenerator* codegen, |
| BreakableStatement* break_target) |
| : NestedStatement(codegen), |
| target_(break_target) {} |
| virtual ~Breakable() {} |
| virtual Breakable* AsBreakable() { return this; } |
| virtual bool IsBreakTarget(Statement* statement) { |
| return target_ == statement; |
| } |
| BreakableStatement* statement() { return target_; } |
| Label* break_target() { return &break_target_label_; } |
| private: |
| BreakableStatement* target_; |
| Label break_target_label_; |
| DISALLOW_COPY_AND_ASSIGN(Breakable); |
| }; |
| |
| class Iteration : public Breakable { |
| public: |
| Iteration(FullCodeGenerator* codegen, |
| IterationStatement* iteration_statement) |
| : Breakable(codegen, iteration_statement) {} |
| virtual ~Iteration() {} |
| virtual Iteration* AsIteration() { return this; } |
| virtual bool IsContinueTarget(Statement* statement) { |
| return this->statement() == statement; |
| } |
| Label* continue_target() { return &continue_target_label_; } |
| private: |
| Label continue_target_label_; |
| DISALLOW_COPY_AND_ASSIGN(Iteration); |
| }; |
| |
| // The environment inside the try block of a try/catch statement. |
| class TryCatch : public NestedStatement { |
| public: |
| explicit TryCatch(FullCodeGenerator* codegen, Label* catch_entry) |
| : NestedStatement(codegen), catch_entry_(catch_entry) { } |
| virtual ~TryCatch() {} |
| virtual TryCatch* AsTryCatch() { return this; } |
| Label* catch_entry() { return catch_entry_; } |
| virtual int Exit(int stack_depth); |
| private: |
| Label* catch_entry_; |
| DISALLOW_COPY_AND_ASSIGN(TryCatch); |
| }; |
| |
| // The environment inside the try block of a try/finally statement. |
| class TryFinally : public NestedStatement { |
| public: |
| explicit TryFinally(FullCodeGenerator* codegen, Label* finally_entry) |
| : NestedStatement(codegen), finally_entry_(finally_entry) { } |
| virtual ~TryFinally() {} |
| virtual TryFinally* AsTryFinally() { return this; } |
| Label* finally_entry() { return finally_entry_; } |
| virtual int Exit(int stack_depth); |
| private: |
| Label* finally_entry_; |
| DISALLOW_COPY_AND_ASSIGN(TryFinally); |
| }; |
| |
| // A FinallyEnvironment represents being inside a finally block. |
| // Abnormal termination of the finally block needs to clean up |
| // the block's parameters from the stack. |
| class Finally : public NestedStatement { |
| public: |
| explicit Finally(FullCodeGenerator* codegen) : NestedStatement(codegen) { } |
| virtual ~Finally() {} |
| virtual Finally* AsFinally() { return this; } |
| virtual int Exit(int stack_depth) { |
| return stack_depth + kFinallyStackElementCount; |
| } |
| private: |
| // Number of extra stack slots occupied during a finally block. |
| static const int kFinallyStackElementCount = 2; |
| DISALLOW_COPY_AND_ASSIGN(Finally); |
| }; |
| |
| // A ForInEnvironment represents being inside a for-in loop. |
| // Abnormal termination of the for-in block needs to clean up |
| // the block's temporary storage from the stack. |
| class ForIn : public Iteration { |
| public: |
| ForIn(FullCodeGenerator* codegen, |
| ForInStatement* statement) |
| : Iteration(codegen, statement) { } |
| virtual ~ForIn() {} |
| virtual ForIn* AsForIn() { return this; } |
| virtual int Exit(int stack_depth) { |
| return stack_depth + kForInStackElementCount; |
| } |
| private: |
| static const int kForInStackElementCount = 5; |
| DISALLOW_COPY_AND_ASSIGN(ForIn); |
| }; |
| |
| // The forward bailout stack keeps track of the expressions that can |
| // bail out to just before the control flow is split in a child |
| // node. The stack elements are linked together through the parent |
| // link when visiting expressions in test contexts after requesting |
| // bailout in child forwarding. |
| class ForwardBailoutStack BASE_EMBEDDED { |
| public: |
| ForwardBailoutStack(Expression* expr, ForwardBailoutStack* parent) |
| : expr_(expr), parent_(parent) { } |
| |
| Expression* expr() const { return expr_; } |
| ForwardBailoutStack* parent() const { return parent_; } |
| |
| private: |
| Expression* const expr_; |
| ForwardBailoutStack* const parent_; |
| }; |
| |
| // Type of a member function that generates inline code for a native function. |
| typedef void (FullCodeGenerator::*InlineFunctionGenerator) |
| (ZoneList<Expression*>*); |
| |
| static const InlineFunctionGenerator kInlineFunctionGenerators[]; |
| |
| // A platform-specific utility to overwrite the accumulator register |
| // with a GC-safe value. |
| void ClearAccumulator(); |
| |
| // Compute the frame pointer relative offset for a given local or |
| // parameter slot. |
| int SlotOffset(Slot* slot); |
| |
| // Determine whether or not to inline the smi case for the given |
| // operation. |
| bool ShouldInlineSmiCase(Token::Value op); |
| |
| // Helper function to convert a pure value into a test context. The value |
| // is expected on the stack or the accumulator, depending on the platform. |
| // See the platform-specific implementation for details. |
| void DoTest(Label* if_true, Label* if_false, Label* fall_through); |
| |
| // Helper function to split control flow and avoid a branch to the |
| // fall-through label if it is set up. |
| void Split(Condition cc, |
| Label* if_true, |
| Label* if_false, |
| Label* fall_through); |
| |
| void Move(Slot* dst, Register source, Register scratch1, Register scratch2); |
| void Move(Register dst, Slot* source); |
| |
| // Return an operand used to read/write to a known (ie, non-LOOKUP) slot. |
| // May emit code to traverse the context chain, destroying the scratch |
| // register. |
| MemOperand EmitSlotSearch(Slot* slot, Register scratch); |
| |
| // Forward the bailout responsibility for the given expression to |
| // the next child visited (which must be in a test context). |
| void ForwardBailoutToChild(Expression* expr); |
| |
| void VisitForEffect(Expression* expr) { |
| EffectContext context(this); |
| HandleInNonTestContext(expr, NO_REGISTERS); |
| } |
| |
| void VisitForAccumulatorValue(Expression* expr) { |
| AccumulatorValueContext context(this); |
| HandleInNonTestContext(expr, TOS_REG); |
| } |
| |
| void VisitForStackValue(Expression* expr) { |
| StackValueContext context(this); |
| HandleInNonTestContext(expr, NO_REGISTERS); |
| } |
| |
| void VisitForControl(Expression* expr, |
| Label* if_true, |
| Label* if_false, |
| Label* fall_through) { |
| TestContext context(this, if_true, if_false, fall_through); |
| VisitInTestContext(expr); |
| // Forwarding bailouts to children is a one shot operation. It |
| // should have been processed at this point. |
| ASSERT(forward_bailout_pending_ == NULL); |
| } |
| |
| void HandleInNonTestContext(Expression* expr, State state); |
| void VisitInTestContext(Expression* expr); |
| |
| void VisitDeclarations(ZoneList<Declaration*>* declarations); |
| void DeclareGlobals(Handle<FixedArray> pairs); |
| |
| // Try to perform a comparison as a fast inlined literal compare if |
| // the operands allow it. Returns true if the compare operations |
| // has been matched and all code generated; false otherwise. |
| bool TryLiteralCompare(Token::Value op, |
| Expression* left, |
| Expression* right, |
| Label* if_true, |
| Label* if_false, |
| Label* fall_through); |
| |
| // Bailout support. |
| void PrepareForBailout(AstNode* node, State state); |
| void PrepareForBailoutForId(int id, State state); |
| |
| // Record a call's return site offset, used to rebuild the frame if the |
| // called function was inlined at the site. |
| void RecordJSReturnSite(Call* call); |
| |
| // Prepare for bailout before a test (or compare) and branch. If |
| // should_normalize, then the following comparison will not handle the |
| // canonical JS true value so we will insert a (dead) test against true at |
| // the actual bailout target from the optimized code. If not |
| // should_normalize, the true and false labels are ignored. |
| void PrepareForBailoutBeforeSplit(State state, |
| bool should_normalize, |
| Label* if_true, |
| Label* if_false); |
| |
| // Platform-specific code for a variable, constant, or function |
| // declaration. Functions have an initial value. |
| void EmitDeclaration(Variable* variable, |
| Variable::Mode mode, |
| FunctionLiteral* function); |
| |
| // Platform-specific code for checking the stack limit at the back edge of |
| // a loop. |
| void EmitStackCheck(IterationStatement* stmt); |
| // Record the OSR AST id corresponding to a stack check in the code. |
| void RecordStackCheck(int osr_ast_id); |
| // Emit a table of stack check ids and pcs into the code stream. Return |
| // the offset of the start of the table. |
| unsigned EmitStackCheckTable(); |
| |
| // Platform-specific return sequence |
| void EmitReturnSequence(); |
| |
| // Platform-specific code sequences for calls |
| void EmitCallWithStub(Call* expr); |
| void EmitCallWithIC(Call* expr, Handle<Object> name, RelocInfo::Mode mode); |
| void EmitKeyedCallWithIC(Call* expr, Expression* key, RelocInfo::Mode mode); |
| |
| // Platform-specific code for inline runtime calls. |
| InlineFunctionGenerator FindInlineFunctionGenerator(Runtime::FunctionId id); |
| |
| void EmitInlineRuntimeCall(CallRuntime* expr); |
| |
| #define EMIT_INLINE_RUNTIME_CALL(name, x, y) \ |
| void Emit##name(ZoneList<Expression*>* arguments); |
| INLINE_FUNCTION_LIST(EMIT_INLINE_RUNTIME_CALL) |
| INLINE_RUNTIME_FUNCTION_LIST(EMIT_INLINE_RUNTIME_CALL) |
| #undef EMIT_INLINE_RUNTIME_CALL |
| |
| // Platform-specific code for loading variables. |
| void EmitLoadGlobalSlotCheckExtensions(Slot* slot, |
| TypeofState typeof_state, |
| Label* slow); |
| MemOperand ContextSlotOperandCheckExtensions(Slot* slot, Label* slow); |
| void EmitDynamicLoadFromSlotFastCase(Slot* slot, |
| TypeofState typeof_state, |
| Label* slow, |
| Label* done); |
| void EmitVariableLoad(Variable* expr); |
| |
| enum ResolveEvalFlag { |
| SKIP_CONTEXT_LOOKUP, |
| PERFORM_CONTEXT_LOOKUP |
| }; |
| |
| // Expects the arguments and the function already pushed. |
| void EmitResolvePossiblyDirectEval(ResolveEvalFlag flag, int arg_count); |
| |
| // Platform-specific support for allocating a new closure based on |
| // the given function info. |
| void EmitNewClosure(Handle<SharedFunctionInfo> info, bool pretenure); |
| |
| // Platform-specific support for compiling assignments. |
| |
| // Load a value from a named property. |
| // The receiver is left on the stack by the IC. |
| void EmitNamedPropertyLoad(Property* expr); |
| |
| // Load a value from a keyed property. |
| // The receiver and the key is left on the stack by the IC. |
| void EmitKeyedPropertyLoad(Property* expr); |
| |
| // Apply the compound assignment operator. Expects the left operand on top |
| // of the stack and the right one in the accumulator. |
| void EmitBinaryOp(Token::Value op, |
| OverwriteMode mode); |
| |
| // Helper functions for generating inlined smi code for certain |
| // binary operations. |
| void EmitInlineSmiBinaryOp(Expression* expr, |
| Token::Value op, |
| OverwriteMode mode, |
| Expression* left, |
| Expression* right); |
| |
| // Assign to the given expression as if via '='. The right-hand-side value |
| // is expected in the accumulator. |
| void EmitAssignment(Expression* expr, int bailout_ast_id); |
| |
| // Complete a variable assignment. The right-hand-side value is expected |
| // in the accumulator. |
| void EmitVariableAssignment(Variable* var, |
| Token::Value op); |
| |
| // Complete a named property assignment. The receiver is expected on top |
| // of the stack and the right-hand-side value in the accumulator. |
| void EmitNamedPropertyAssignment(Assignment* expr); |
| |
| // Complete a keyed property assignment. The receiver and key are |
| // expected on top of the stack and the right-hand-side value in the |
| // accumulator. |
| void EmitKeyedPropertyAssignment(Assignment* expr); |
| |
| void SetFunctionPosition(FunctionLiteral* fun); |
| void SetReturnPosition(FunctionLiteral* fun); |
| void SetStatementPosition(Statement* stmt); |
| void SetExpressionPosition(Expression* expr, int pos); |
| void SetStatementPosition(int pos); |
| void SetSourcePosition(int pos); |
| |
| // Non-local control flow support. |
| void EnterFinallyBlock(); |
| void ExitFinallyBlock(); |
| |
| // Loop nesting counter. |
| int loop_depth() { return loop_depth_; } |
| void increment_loop_depth() { loop_depth_++; } |
| void decrement_loop_depth() { |
| ASSERT(loop_depth_ > 0); |
| loop_depth_--; |
| } |
| |
| MacroAssembler* masm() { return masm_; } |
| |
| class ExpressionContext; |
| const ExpressionContext* context() { return context_; } |
| void set_new_context(const ExpressionContext* context) { context_ = context; } |
| |
| Handle<Script> script() { return info_->script(); } |
| bool is_eval() { return info_->is_eval(); } |
| bool is_strict_mode() { return function()->strict_mode(); } |
| StrictModeFlag strict_mode_flag() { |
| return is_strict_mode() ? kStrictMode : kNonStrictMode; |
| } |
| FunctionLiteral* function() { return info_->function(); } |
| Scope* scope() { return info_->scope(); } |
| |
| static Register result_register(); |
| static Register context_register(); |
| |
| // Helper for calling an IC stub. |
| void EmitCallIC(Handle<Code> ic, RelocInfo::Mode mode); |
| |
| // Calling an IC stub with a patch site. Passing NULL for patch_site |
| // or non NULL patch_site which is not activated indicates no inlined smi code |
| // and emits a nop after the IC call. |
| void EmitCallIC(Handle<Code> ic, JumpPatchSite* patch_site); |
| |
| // Set fields in the stack frame. Offsets are the frame pointer relative |
| // offsets defined in, e.g., StandardFrameConstants. |
| void StoreToFrameField(int frame_offset, Register value); |
| |
| // Load a value from the current context. Indices are defined as an enum |
| // in v8::internal::Context. |
| void LoadContextField(Register dst, int context_index); |
| |
| // AST node visit functions. |
| #define DECLARE_VISIT(type) virtual void Visit##type(type* node); |
| AST_NODE_LIST(DECLARE_VISIT) |
| #undef DECLARE_VISIT |
| // Handles the shortcutted logical binary operations in VisitBinaryOperation. |
| void EmitLogicalOperation(BinaryOperation* expr); |
| |
| void VisitForTypeofValue(Expression* expr); |
| |
| struct BailoutEntry { |
| unsigned id; |
| unsigned pc_and_state; |
| }; |
| |
| |
| class ExpressionContext BASE_EMBEDDED { |
| public: |
| explicit ExpressionContext(FullCodeGenerator* codegen) |
| : masm_(codegen->masm()), old_(codegen->context()), codegen_(codegen) { |
| codegen->set_new_context(this); |
| } |
| |
| virtual ~ExpressionContext() { |
| codegen_->set_new_context(old_); |
| } |
| |
| // Convert constant control flow (true or false) to the result expected for |
| // this expression context. |
| virtual void Plug(bool flag) const = 0; |
| |
| // Emit code to convert a pure value (in a register, slot, as a literal, |
| // or on top of the stack) into the result expected according to this |
| // expression context. |
| virtual void Plug(Register reg) const = 0; |
| virtual void Plug(Slot* slot) const = 0; |
| virtual void Plug(Handle<Object> lit) const = 0; |
| virtual void Plug(Heap::RootListIndex index) const = 0; |
| virtual void PlugTOS() const = 0; |
| |
| // Emit code to convert pure control flow to a pair of unbound labels into |
| // the result expected according to this expression context. The |
| // implementation will bind both labels unless it's a TestContext, which |
| // won't bind them at this point. |
| virtual void Plug(Label* materialize_true, |
| Label* materialize_false) const = 0; |
| |
| // Emit code to discard count elements from the top of stack, then convert |
| // a pure value into the result expected according to this expression |
| // context. |
| virtual void DropAndPlug(int count, Register reg) const = 0; |
| |
| // For shortcutting operations || and &&. |
| virtual void EmitLogicalLeft(BinaryOperation* expr, |
| Label* eval_right, |
| Label* done) const = 0; |
| |
| // Set up branch labels for a test expression. The three Label** parameters |
| // are output parameters. |
| virtual void PrepareTest(Label* materialize_true, |
| Label* materialize_false, |
| Label** if_true, |
| Label** if_false, |
| Label** fall_through) const = 0; |
| |
| virtual void HandleExpression(Expression* expr) const = 0; |
| |
| // Returns true if we are evaluating only for side effects (ie if the result |
| // will be discarded). |
| virtual bool IsEffect() const { return false; } |
| |
| // Returns true if we are branching on the value rather than materializing |
| // it. Only used for asserts. |
| virtual bool IsTest() const { return false; } |
| |
| protected: |
| FullCodeGenerator* codegen() const { return codegen_; } |
| MacroAssembler* masm() const { return masm_; } |
| MacroAssembler* masm_; |
| |
| private: |
| const ExpressionContext* old_; |
| FullCodeGenerator* codegen_; |
| }; |
| |
| class AccumulatorValueContext : public ExpressionContext { |
| public: |
| explicit AccumulatorValueContext(FullCodeGenerator* codegen) |
| : ExpressionContext(codegen) { } |
| |
| virtual void Plug(bool flag) const; |
| virtual void Plug(Register reg) const; |
| virtual void Plug(Label* materialize_true, Label* materialize_false) const; |
| virtual void Plug(Slot* slot) const; |
| virtual void Plug(Handle<Object> lit) const; |
| virtual void Plug(Heap::RootListIndex) const; |
| virtual void PlugTOS() const; |
| virtual void DropAndPlug(int count, Register reg) const; |
| virtual void EmitLogicalLeft(BinaryOperation* expr, |
| Label* eval_right, |
| Label* done) const; |
| virtual void PrepareTest(Label* materialize_true, |
| Label* materialize_false, |
| Label** if_true, |
| Label** if_false, |
| Label** fall_through) const; |
| virtual void HandleExpression(Expression* expr) const; |
| }; |
| |
| class StackValueContext : public ExpressionContext { |
| public: |
| explicit StackValueContext(FullCodeGenerator* codegen) |
| : ExpressionContext(codegen) { } |
| |
| virtual void Plug(bool flag) const; |
| virtual void Plug(Register reg) const; |
| virtual void Plug(Label* materialize_true, Label* materialize_false) const; |
| virtual void Plug(Slot* slot) const; |
| virtual void Plug(Handle<Object> lit) const; |
| virtual void Plug(Heap::RootListIndex) const; |
| virtual void PlugTOS() const; |
| virtual void DropAndPlug(int count, Register reg) const; |
| virtual void EmitLogicalLeft(BinaryOperation* expr, |
| Label* eval_right, |
| Label* done) const; |
| virtual void PrepareTest(Label* materialize_true, |
| Label* materialize_false, |
| Label** if_true, |
| Label** if_false, |
| Label** fall_through) const; |
| virtual void HandleExpression(Expression* expr) const; |
| }; |
| |
| class TestContext : public ExpressionContext { |
| public: |
| explicit TestContext(FullCodeGenerator* codegen, |
| Label* true_label, |
| Label* false_label, |
| Label* fall_through) |
| : ExpressionContext(codegen), |
| true_label_(true_label), |
| false_label_(false_label), |
| fall_through_(fall_through) { } |
| |
| static const TestContext* cast(const ExpressionContext* context) { |
| ASSERT(context->IsTest()); |
| return reinterpret_cast<const TestContext*>(context); |
| } |
| |
| Label* true_label() const { return true_label_; } |
| Label* false_label() const { return false_label_; } |
| Label* fall_through() const { return fall_through_; } |
| |
| virtual void Plug(bool flag) const; |
| virtual void Plug(Register reg) const; |
| virtual void Plug(Label* materialize_true, Label* materialize_false) const; |
| virtual void Plug(Slot* slot) const; |
| virtual void Plug(Handle<Object> lit) const; |
| virtual void Plug(Heap::RootListIndex) const; |
| virtual void PlugTOS() const; |
| virtual void DropAndPlug(int count, Register reg) const; |
| virtual void EmitLogicalLeft(BinaryOperation* expr, |
| Label* eval_right, |
| Label* done) const; |
| virtual void PrepareTest(Label* materialize_true, |
| Label* materialize_false, |
| Label** if_true, |
| Label** if_false, |
| Label** fall_through) const; |
| virtual void HandleExpression(Expression* expr) const; |
| virtual bool IsTest() const { return true; } |
| |
| private: |
| Label* true_label_; |
| Label* false_label_; |
| Label* fall_through_; |
| }; |
| |
| class EffectContext : public ExpressionContext { |
| public: |
| explicit EffectContext(FullCodeGenerator* codegen) |
| : ExpressionContext(codegen) { } |
| |
| virtual void Plug(bool flag) const; |
| virtual void Plug(Register reg) const; |
| virtual void Plug(Label* materialize_true, Label* materialize_false) const; |
| virtual void Plug(Slot* slot) const; |
| virtual void Plug(Handle<Object> lit) const; |
| virtual void Plug(Heap::RootListIndex) const; |
| virtual void PlugTOS() const; |
| virtual void DropAndPlug(int count, Register reg) const; |
| virtual void EmitLogicalLeft(BinaryOperation* expr, |
| Label* eval_right, |
| Label* done) const; |
| virtual void PrepareTest(Label* materialize_true, |
| Label* materialize_false, |
| Label** if_true, |
| Label** if_false, |
| Label** fall_through) const; |
| virtual void HandleExpression(Expression* expr) const; |
| virtual bool IsEffect() const { return true; } |
| }; |
| |
| MacroAssembler* masm_; |
| CompilationInfo* info_; |
| Label return_label_; |
| NestedStatement* nesting_stack_; |
| int loop_depth_; |
| const ExpressionContext* context_; |
| ZoneList<BailoutEntry> bailout_entries_; |
| ZoneList<BailoutEntry> stack_checks_; |
| ForwardBailoutStack* forward_bailout_stack_; |
| ForwardBailoutStack* forward_bailout_pending_; |
| |
| friend class NestedStatement; |
| |
| DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator); |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_FULL_CODEGEN_H_ |