| // Copyright 2011 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_HYDROGEN_H_ |
| #define V8_HYDROGEN_H_ |
| |
| #include "v8.h" |
| |
| #include "ast.h" |
| #include "compiler.h" |
| #include "data-flow.h" |
| #include "hydrogen-instructions.h" |
| #include "zone.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Forward declarations. |
| class HEnvironment; |
| class HGraph; |
| class HLoopInformation; |
| class HTracer; |
| class LAllocator; |
| class LChunk; |
| class LiveRange; |
| |
| |
| class HBasicBlock: public ZoneObject { |
| public: |
| explicit HBasicBlock(HGraph* graph); |
| virtual ~HBasicBlock() { } |
| |
| // Simple accessors. |
| int block_id() const { return block_id_; } |
| void set_block_id(int id) { block_id_ = id; } |
| HGraph* graph() const { return graph_; } |
| const ZoneList<HPhi*>* phis() const { return &phis_; } |
| HInstruction* first() const { return first_; } |
| HInstruction* last() const { return last_; } |
| void set_last(HInstruction* instr) { last_ = instr; } |
| HInstruction* GetLastInstruction(); |
| HControlInstruction* end() const { return end_; } |
| HLoopInformation* loop_information() const { return loop_information_; } |
| const ZoneList<HBasicBlock*>* predecessors() const { return &predecessors_; } |
| bool HasPredecessor() const { return predecessors_.length() > 0; } |
| const ZoneList<HBasicBlock*>* dominated_blocks() const { |
| return &dominated_blocks_; |
| } |
| const ZoneList<int>* deleted_phis() const { |
| return &deleted_phis_; |
| } |
| void RecordDeletedPhi(int merge_index) { |
| deleted_phis_.Add(merge_index); |
| } |
| HBasicBlock* dominator() const { return dominator_; } |
| HEnvironment* last_environment() const { return last_environment_; } |
| int argument_count() const { return argument_count_; } |
| void set_argument_count(int count) { argument_count_ = count; } |
| int first_instruction_index() const { return first_instruction_index_; } |
| void set_first_instruction_index(int index) { |
| first_instruction_index_ = index; |
| } |
| int last_instruction_index() const { return last_instruction_index_; } |
| void set_last_instruction_index(int index) { |
| last_instruction_index_ = index; |
| } |
| |
| void AttachLoopInformation(); |
| void DetachLoopInformation(); |
| bool IsLoopHeader() const { return loop_information() != NULL; } |
| bool IsStartBlock() const { return block_id() == 0; } |
| void PostProcessLoopHeader(IterationStatement* stmt); |
| |
| bool IsFinished() const { return end_ != NULL; } |
| void AddPhi(HPhi* phi); |
| void RemovePhi(HPhi* phi); |
| void AddInstruction(HInstruction* instr); |
| bool Dominates(HBasicBlock* other) const; |
| |
| void SetInitialEnvironment(HEnvironment* env); |
| void ClearEnvironment() { last_environment_ = NULL; } |
| bool HasEnvironment() const { return last_environment_ != NULL; } |
| void UpdateEnvironment(HEnvironment* env) { last_environment_ = env; } |
| HBasicBlock* parent_loop_header() const { return parent_loop_header_; } |
| |
| void set_parent_loop_header(HBasicBlock* block) { |
| ASSERT(parent_loop_header_ == NULL); |
| parent_loop_header_ = block; |
| } |
| |
| bool HasParentLoopHeader() const { return parent_loop_header_ != NULL; } |
| |
| void SetJoinId(int id); |
| |
| void Finish(HControlInstruction* last); |
| void FinishExit(HControlInstruction* instruction); |
| void Goto(HBasicBlock* block, bool include_stack_check = false); |
| |
| int PredecessorIndexOf(HBasicBlock* predecessor) const; |
| void AddSimulate(int id) { AddInstruction(CreateSimulate(id)); } |
| void AssignCommonDominator(HBasicBlock* other); |
| |
| // Add the inlined function exit sequence, adding an HLeaveInlined |
| // instruction and updating the bailout environment. |
| void AddLeaveInlined(HValue* return_value, HBasicBlock* target); |
| |
| // If a target block is tagged as an inline function return, all |
| // predecessors should contain the inlined exit sequence: |
| // |
| // LeaveInlined |
| // Simulate (caller's environment) |
| // Goto (target block) |
| bool IsInlineReturnTarget() const { return is_inline_return_target_; } |
| void MarkAsInlineReturnTarget() { is_inline_return_target_ = true; } |
| |
| #ifdef DEBUG |
| void Verify(); |
| #endif |
| |
| private: |
| void RegisterPredecessor(HBasicBlock* pred); |
| void AddDominatedBlock(HBasicBlock* block); |
| |
| HSimulate* CreateSimulate(int id); |
| |
| int block_id_; |
| HGraph* graph_; |
| ZoneList<HPhi*> phis_; |
| HInstruction* first_; |
| HInstruction* last_; |
| HControlInstruction* end_; |
| HLoopInformation* loop_information_; |
| ZoneList<HBasicBlock*> predecessors_; |
| HBasicBlock* dominator_; |
| ZoneList<HBasicBlock*> dominated_blocks_; |
| HEnvironment* last_environment_; |
| // Outgoing parameter count at block exit, set during lithium translation. |
| int argument_count_; |
| // Instruction indices into the lithium code stream. |
| int first_instruction_index_; |
| int last_instruction_index_; |
| ZoneList<int> deleted_phis_; |
| HBasicBlock* parent_loop_header_; |
| bool is_inline_return_target_; |
| }; |
| |
| |
| class HLoopInformation: public ZoneObject { |
| public: |
| explicit HLoopInformation(HBasicBlock* loop_header) |
| : back_edges_(4), loop_header_(loop_header), blocks_(8) { |
| blocks_.Add(loop_header); |
| } |
| virtual ~HLoopInformation() {} |
| |
| const ZoneList<HBasicBlock*>* back_edges() const { return &back_edges_; } |
| const ZoneList<HBasicBlock*>* blocks() const { return &blocks_; } |
| HBasicBlock* loop_header() const { return loop_header_; } |
| HBasicBlock* GetLastBackEdge() const; |
| void RegisterBackEdge(HBasicBlock* block); |
| |
| private: |
| void AddBlock(HBasicBlock* block); |
| |
| ZoneList<HBasicBlock*> back_edges_; |
| HBasicBlock* loop_header_; |
| ZoneList<HBasicBlock*> blocks_; |
| }; |
| |
| |
| class HGraph: public ZoneObject { |
| public: |
| explicit HGraph(CompilationInfo* info); |
| |
| const ZoneList<HBasicBlock*>* blocks() const { return &blocks_; } |
| const ZoneList<HPhi*>* phi_list() const { return phi_list_; } |
| HBasicBlock* entry_block() const { return entry_block_; } |
| HEnvironment* start_environment() const { return start_environment_; } |
| |
| void InitializeInferredTypes(); |
| void InsertTypeConversions(); |
| void InsertRepresentationChanges(); |
| void ComputeMinusZeroChecks(); |
| bool ProcessArgumentsObject(); |
| void EliminateRedundantPhis(); |
| void EliminateUnreachablePhis(); |
| void Canonicalize(); |
| void OrderBlocks(); |
| void AssignDominators(); |
| |
| // Returns false if there are phi-uses of the arguments-object |
| // which are not supported by the optimizing compiler. |
| bool CollectPhis(); |
| |
| Handle<Code> Compile(CompilationInfo* info); |
| |
| void set_undefined_constant(HConstant* constant) { |
| undefined_constant_.set(constant); |
| } |
| HConstant* GetConstantUndefined() const { return undefined_constant_.get(); } |
| HConstant* GetConstant1(); |
| HConstant* GetConstantMinus1(); |
| HConstant* GetConstantTrue(); |
| HConstant* GetConstantFalse(); |
| |
| HBasicBlock* CreateBasicBlock(); |
| HArgumentsObject* GetArgumentsObject() const { |
| return arguments_object_.get(); |
| } |
| bool HasArgumentsObject() const { return arguments_object_.is_set(); } |
| |
| void SetArgumentsObject(HArgumentsObject* object) { |
| arguments_object_.set(object); |
| } |
| |
| int GetMaximumValueID() const { return values_.length(); } |
| int GetNextBlockID() { return next_block_id_++; } |
| int GetNextValueID(HValue* value) { |
| values_.Add(value); |
| return values_.length() - 1; |
| } |
| HValue* LookupValue(int id) const { |
| if (id >= 0 && id < values_.length()) return values_[id]; |
| return NULL; |
| } |
| |
| #ifdef DEBUG |
| void Verify() const; |
| #endif |
| |
| private: |
| void Postorder(HBasicBlock* block, |
| BitVector* visited, |
| ZoneList<HBasicBlock*>* order, |
| HBasicBlock* loop_header); |
| void PostorderLoopBlocks(HLoopInformation* loop, |
| BitVector* visited, |
| ZoneList<HBasicBlock*>* order, |
| HBasicBlock* loop_header); |
| HConstant* GetConstant(SetOncePointer<HConstant>* pointer, |
| Object* value); |
| |
| void InsertTypeConversions(HInstruction* instr); |
| void PropagateMinusZeroChecks(HValue* value, BitVector* visited); |
| void InsertRepresentationChangeForUse(HValue* value, |
| HValue* use, |
| Representation to); |
| void InsertRepresentationChangesForValue(HValue* current, |
| ZoneList<HValue*>* value_list, |
| ZoneList<Representation>* rep_list); |
| void InferTypes(ZoneList<HValue*>* worklist); |
| void InitializeInferredTypes(int from_inclusive, int to_inclusive); |
| void CheckForBackEdge(HBasicBlock* block, HBasicBlock* successor); |
| |
| int next_block_id_; |
| HBasicBlock* entry_block_; |
| HEnvironment* start_environment_; |
| ZoneList<HBasicBlock*> blocks_; |
| ZoneList<HValue*> values_; |
| ZoneList<HPhi*>* phi_list_; |
| SetOncePointer<HConstant> undefined_constant_; |
| SetOncePointer<HConstant> constant_1_; |
| SetOncePointer<HConstant> constant_minus1_; |
| SetOncePointer<HConstant> constant_true_; |
| SetOncePointer<HConstant> constant_false_; |
| SetOncePointer<HArgumentsObject> arguments_object_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HGraph); |
| }; |
| |
| |
| class HEnvironment: public ZoneObject { |
| public: |
| HEnvironment(HEnvironment* outer, |
| Scope* scope, |
| Handle<JSFunction> closure); |
| |
| // Simple accessors. |
| Handle<JSFunction> closure() const { return closure_; } |
| const ZoneList<HValue*>* values() const { return &values_; } |
| const ZoneList<int>* assigned_variables() const { |
| return &assigned_variables_; |
| } |
| int parameter_count() const { return parameter_count_; } |
| int local_count() const { return local_count_; } |
| HEnvironment* outer() const { return outer_; } |
| int pop_count() const { return pop_count_; } |
| int push_count() const { return push_count_; } |
| |
| int ast_id() const { return ast_id_; } |
| void set_ast_id(int id) { ast_id_ = id; } |
| |
| int length() const { return values_.length(); } |
| |
| void Bind(Variable* variable, HValue* value) { |
| Bind(IndexFor(variable), value); |
| } |
| |
| void Bind(int index, HValue* value); |
| |
| HValue* Lookup(Variable* variable) const { |
| return Lookup(IndexFor(variable)); |
| } |
| |
| HValue* Lookup(int index) const { |
| HValue* result = values_[index]; |
| ASSERT(result != NULL); |
| return result; |
| } |
| |
| void Push(HValue* value) { |
| ASSERT(value != NULL); |
| ++push_count_; |
| values_.Add(value); |
| } |
| |
| HValue* Pop() { |
| ASSERT(!ExpressionStackIsEmpty()); |
| if (push_count_ > 0) { |
| --push_count_; |
| } else { |
| ++pop_count_; |
| } |
| return values_.RemoveLast(); |
| } |
| |
| void Drop(int count); |
| |
| HValue* Top() const { return ExpressionStackAt(0); } |
| |
| HValue* ExpressionStackAt(int index_from_top) const { |
| int index = length() - index_from_top - 1; |
| ASSERT(HasExpressionAt(index)); |
| return values_[index]; |
| } |
| |
| void SetExpressionStackAt(int index_from_top, HValue* value); |
| |
| HEnvironment* Copy() const; |
| HEnvironment* CopyWithoutHistory() const; |
| HEnvironment* CopyAsLoopHeader(HBasicBlock* block) const; |
| |
| // Create an "inlined version" of this environment, where the original |
| // environment is the outer environment but the top expression stack |
| // elements are moved to an inner environment as parameters. If |
| // is_speculative, the argument values are expected to be PushArgument |
| // instructions, otherwise they are the actual values. |
| HEnvironment* CopyForInlining(Handle<JSFunction> target, |
| FunctionLiteral* function, |
| bool is_speculative, |
| HConstant* undefined) const; |
| |
| void AddIncomingEdge(HBasicBlock* block, HEnvironment* other); |
| |
| void ClearHistory() { |
| pop_count_ = 0; |
| push_count_ = 0; |
| assigned_variables_.Rewind(0); |
| } |
| |
| void SetValueAt(int index, HValue* value) { |
| ASSERT(index < length()); |
| values_[index] = value; |
| } |
| |
| void PrintTo(StringStream* stream); |
| void PrintToStd(); |
| |
| private: |
| explicit HEnvironment(const HEnvironment* other); |
| |
| // True if index is included in the expression stack part of the environment. |
| bool HasExpressionAt(int index) const; |
| |
| bool ExpressionStackIsEmpty() const; |
| |
| void Initialize(int parameter_count, int local_count, int stack_height); |
| void Initialize(const HEnvironment* other); |
| |
| // Map a variable to an environment index. Parameter indices are shifted |
| // by 1 (receiver is parameter index -1 but environment index 0). |
| // Stack-allocated local indices are shifted by the number of parameters. |
| int IndexFor(Variable* variable) const { |
| Slot* slot = variable->AsSlot(); |
| ASSERT(slot != NULL && slot->IsStackAllocated()); |
| int shift = (slot->type() == Slot::PARAMETER) ? 1 : parameter_count_; |
| return slot->index() + shift; |
| } |
| |
| Handle<JSFunction> closure_; |
| // Value array [parameters] [locals] [temporaries]. |
| ZoneList<HValue*> values_; |
| ZoneList<int> assigned_variables_; |
| int parameter_count_; |
| int local_count_; |
| HEnvironment* outer_; |
| int pop_count_; |
| int push_count_; |
| int ast_id_; |
| }; |
| |
| |
| class HGraphBuilder; |
| |
| // This class is not BASE_EMBEDDED because our inlining implementation uses |
| // new and delete. |
| class AstContext { |
| public: |
| bool IsEffect() const { return kind_ == Expression::kEffect; } |
| bool IsValue() const { return kind_ == Expression::kValue; } |
| bool IsTest() const { return kind_ == Expression::kTest; } |
| |
| // 'Fill' this context with a hydrogen value. The value is assumed to |
| // have already been inserted in the instruction stream (or not need to |
| // be, e.g., HPhi). Call this function in tail position in the Visit |
| // functions for expressions. |
| virtual void ReturnValue(HValue* value) = 0; |
| |
| // Add a hydrogen instruction to the instruction stream (recording an |
| // environment simulation if necessary) and then fill this context with |
| // the instruction as value. |
| virtual void ReturnInstruction(HInstruction* instr, int ast_id) = 0; |
| |
| void set_for_typeof(bool for_typeof) { for_typeof_ = for_typeof; } |
| bool is_for_typeof() { return for_typeof_; } |
| |
| protected: |
| AstContext(HGraphBuilder* owner, Expression::Context kind); |
| virtual ~AstContext(); |
| |
| HGraphBuilder* owner() const { return owner_; } |
| |
| // We want to be able to assert, in a context-specific way, that the stack |
| // height makes sense when the context is filled. |
| #ifdef DEBUG |
| int original_length_; |
| #endif |
| |
| private: |
| HGraphBuilder* owner_; |
| Expression::Context kind_; |
| AstContext* outer_; |
| bool for_typeof_; |
| }; |
| |
| |
| class EffectContext: public AstContext { |
| public: |
| explicit EffectContext(HGraphBuilder* owner) |
| : AstContext(owner, Expression::kEffect) { |
| } |
| virtual ~EffectContext(); |
| |
| virtual void ReturnValue(HValue* value); |
| virtual void ReturnInstruction(HInstruction* instr, int ast_id); |
| }; |
| |
| |
| class ValueContext: public AstContext { |
| public: |
| explicit ValueContext(HGraphBuilder* owner) |
| : AstContext(owner, Expression::kValue) { |
| } |
| virtual ~ValueContext(); |
| |
| virtual void ReturnValue(HValue* value); |
| virtual void ReturnInstruction(HInstruction* instr, int ast_id); |
| }; |
| |
| |
| class TestContext: public AstContext { |
| public: |
| TestContext(HGraphBuilder* owner, |
| HBasicBlock* if_true, |
| HBasicBlock* if_false) |
| : AstContext(owner, Expression::kTest), |
| if_true_(if_true), |
| if_false_(if_false) { |
| } |
| |
| virtual void ReturnValue(HValue* value); |
| virtual void ReturnInstruction(HInstruction* instr, int ast_id); |
| |
| static TestContext* cast(AstContext* context) { |
| ASSERT(context->IsTest()); |
| return reinterpret_cast<TestContext*>(context); |
| } |
| |
| HBasicBlock* if_true() const { return if_true_; } |
| HBasicBlock* if_false() const { return if_false_; } |
| |
| private: |
| // Build the shared core part of the translation unpacking a value into |
| // control flow. |
| void BuildBranch(HValue* value); |
| |
| HBasicBlock* if_true_; |
| HBasicBlock* if_false_; |
| }; |
| |
| |
| class FunctionState BASE_EMBEDDED { |
| public: |
| FunctionState(HGraphBuilder* owner, |
| CompilationInfo* info, |
| TypeFeedbackOracle* oracle); |
| ~FunctionState(); |
| |
| CompilationInfo* compilation_info() { return compilation_info_; } |
| TypeFeedbackOracle* oracle() { return oracle_; } |
| AstContext* call_context() { return call_context_; } |
| HBasicBlock* function_return() { return function_return_; } |
| TestContext* test_context() { return test_context_; } |
| void ClearInlinedTestContext() { |
| delete test_context_; |
| test_context_ = NULL; |
| } |
| |
| private: |
| HGraphBuilder* owner_; |
| |
| CompilationInfo* compilation_info_; |
| TypeFeedbackOracle* oracle_; |
| |
| // During function inlining, expression context of the call being |
| // inlined. NULL when not inlining. |
| AstContext* call_context_; |
| |
| // When inlining in an effect of value context, this is the return block. |
| // It is NULL otherwise. When inlining in a test context, there are a |
| // pair of return blocks in the context. When not inlining, there is no |
| // local return point. |
| HBasicBlock* function_return_; |
| |
| // When inlining a call in a test context, a context containing a pair of |
| // return blocks. NULL in all other cases. |
| TestContext* test_context_; |
| |
| FunctionState* outer_; |
| }; |
| |
| |
| class HGraphBuilder: public AstVisitor { |
| public: |
| enum BreakType { BREAK, CONTINUE }; |
| |
| // A class encapsulating (lazily-allocated) break and continue blocks for |
| // a breakable statement. Separated from BreakAndContinueScope so that it |
| // can have a separate lifetime. |
| class BreakAndContinueInfo BASE_EMBEDDED { |
| public: |
| explicit BreakAndContinueInfo(BreakableStatement* target) |
| : target_(target), break_block_(NULL), continue_block_(NULL) { |
| } |
| |
| BreakableStatement* target() { return target_; } |
| HBasicBlock* break_block() { return break_block_; } |
| void set_break_block(HBasicBlock* block) { break_block_ = block; } |
| HBasicBlock* continue_block() { return continue_block_; } |
| void set_continue_block(HBasicBlock* block) { continue_block_ = block; } |
| |
| private: |
| BreakableStatement* target_; |
| HBasicBlock* break_block_; |
| HBasicBlock* continue_block_; |
| }; |
| |
| // A helper class to maintain a stack of current BreakAndContinueInfo |
| // structures mirroring BreakableStatement nesting. |
| class BreakAndContinueScope BASE_EMBEDDED { |
| public: |
| BreakAndContinueScope(BreakAndContinueInfo* info, HGraphBuilder* owner) |
| : info_(info), owner_(owner), next_(owner->break_scope()) { |
| owner->set_break_scope(this); |
| } |
| |
| ~BreakAndContinueScope() { owner_->set_break_scope(next_); } |
| |
| BreakAndContinueInfo* info() { return info_; } |
| HGraphBuilder* owner() { return owner_; } |
| BreakAndContinueScope* next() { return next_; } |
| |
| // Search the break stack for a break or continue target. |
| HBasicBlock* Get(BreakableStatement* stmt, BreakType type); |
| |
| private: |
| BreakAndContinueInfo* info_; |
| HGraphBuilder* owner_; |
| BreakAndContinueScope* next_; |
| }; |
| |
| HGraphBuilder(CompilationInfo* info, TypeFeedbackOracle* oracle) |
| : function_state_(NULL), |
| initial_function_state_(this, info, oracle), |
| ast_context_(NULL), |
| break_scope_(NULL), |
| graph_(NULL), |
| current_block_(NULL), |
| inlined_count_(0) { |
| // This is not initialized in the initializer list because the |
| // constructor for the initial state relies on function_state_ == NULL |
| // to know it's the initial state. |
| function_state_= &initial_function_state_; |
| } |
| |
| HGraph* CreateGraph(); |
| |
| // Simple accessors. |
| HGraph* graph() const { return graph_; } |
| BreakAndContinueScope* break_scope() const { return break_scope_; } |
| void set_break_scope(BreakAndContinueScope* head) { break_scope_ = head; } |
| |
| HBasicBlock* current_block() const { return current_block_; } |
| void set_current_block(HBasicBlock* block) { current_block_ = block; } |
| HEnvironment* environment() const { |
| return current_block()->last_environment(); |
| } |
| |
| // Adding instructions. |
| HInstruction* AddInstruction(HInstruction* instr); |
| void AddSimulate(int id); |
| |
| // Bailout environment manipulation. |
| void Push(HValue* value) { environment()->Push(value); } |
| HValue* Pop() { return environment()->Pop(); } |
| |
| private: |
| // Type of a member function that generates inline code for a native function. |
| typedef void (HGraphBuilder::*InlineFunctionGenerator)(CallRuntime* call); |
| |
| // Forward declarations for inner scope classes. |
| class SubgraphScope; |
| |
| static const InlineFunctionGenerator kInlineFunctionGenerators[]; |
| |
| static const int kMaxCallPolymorphism = 4; |
| static const int kMaxLoadPolymorphism = 4; |
| static const int kMaxStorePolymorphism = 4; |
| |
| static const int kMaxInlinedNodes = 196; |
| static const int kMaxInlinedSize = 196; |
| static const int kMaxSourceSize = 600; |
| |
| // Simple accessors. |
| FunctionState* function_state() const { return function_state_; } |
| void set_function_state(FunctionState* state) { function_state_ = state; } |
| |
| AstContext* ast_context() const { return ast_context_; } |
| void set_ast_context(AstContext* context) { ast_context_ = context; } |
| |
| // Accessors forwarded to the function state. |
| CompilationInfo* info() const { |
| return function_state()->compilation_info(); |
| } |
| TypeFeedbackOracle* oracle() const { return function_state()->oracle(); } |
| |
| AstContext* call_context() const { |
| return function_state()->call_context(); |
| } |
| HBasicBlock* function_return() const { |
| return function_state()->function_return(); |
| } |
| TestContext* inlined_test_context() const { |
| return function_state()->test_context(); |
| } |
| void ClearInlinedTestContext() { |
| function_state()->ClearInlinedTestContext(); |
| } |
| |
| // Generators for inline runtime functions. |
| #define INLINE_FUNCTION_GENERATOR_DECLARATION(Name, argc, ressize) \ |
| void Generate##Name(CallRuntime* call); |
| |
| INLINE_FUNCTION_LIST(INLINE_FUNCTION_GENERATOR_DECLARATION) |
| INLINE_RUNTIME_FUNCTION_LIST(INLINE_FUNCTION_GENERATOR_DECLARATION) |
| #undef INLINE_FUNCTION_GENERATOR_DECLARATION |
| |
| void Bailout(const char* reason); |
| |
| void PreProcessOsrEntry(IterationStatement* statement); |
| // True iff. we are compiling for OSR and the statement is the entry. |
| bool HasOsrEntryAt(IterationStatement* statement); |
| |
| HBasicBlock* CreateJoin(HBasicBlock* first, |
| HBasicBlock* second, |
| int join_id); |
| |
| // Create a back edge in the flow graph. body_exit is the predecessor |
| // block and loop_entry is the successor block. loop_successor is the |
| // block where control flow exits the loop normally (e.g., via failure of |
| // the condition) and break_block is the block where control flow breaks |
| // from the loop. All blocks except loop_entry can be NULL. The return |
| // value is the new successor block which is the join of loop_successor |
| // and break_block, or NULL. |
| HBasicBlock* CreateLoop(IterationStatement* statement, |
| HBasicBlock* loop_entry, |
| HBasicBlock* body_exit, |
| HBasicBlock* loop_successor, |
| HBasicBlock* break_block); |
| |
| HBasicBlock* JoinContinue(IterationStatement* statement, |
| HBasicBlock* exit_block, |
| HBasicBlock* continue_block); |
| |
| HValue* Top() const { return environment()->Top(); } |
| void Drop(int n) { environment()->Drop(n); } |
| void Bind(Variable* var, HValue* value) { environment()->Bind(var, value); } |
| |
| void VisitForValue(Expression* expr); |
| void VisitForTypeOf(Expression* expr); |
| void VisitForEffect(Expression* expr); |
| void VisitForControl(Expression* expr, |
| HBasicBlock* true_block, |
| HBasicBlock* false_block); |
| |
| // Visit an argument subexpression and emit a push to the outgoing |
| // arguments. |
| void VisitArgument(Expression* expr); |
| void VisitArgumentList(ZoneList<Expression*>* arguments); |
| |
| // Visit a list of expressions from left to right, each in a value context. |
| void VisitExpressions(ZoneList<Expression*>* exprs); |
| |
| void AddPhi(HPhi* phi); |
| |
| void PushAndAdd(HInstruction* instr); |
| |
| // Remove the arguments from the bailout environment and emit instructions |
| // to push them as outgoing parameters. |
| template <int V> HInstruction* PreProcessCall(HCall<V>* call); |
| |
| void AssumeRepresentation(HValue* value, Representation r); |
| static Representation ToRepresentation(TypeInfo info); |
| |
| void SetupScope(Scope* scope); |
| virtual void VisitStatements(ZoneList<Statement*>* statements); |
| |
| #define DECLARE_VISIT(type) virtual void Visit##type(type* node); |
| AST_NODE_LIST(DECLARE_VISIT) |
| #undef DECLARE_VISIT |
| |
| HBasicBlock* CreateBasicBlock(HEnvironment* env); |
| HBasicBlock* CreateLoopHeaderBlock(); |
| |
| // Helpers for flow graph construction. |
| enum GlobalPropertyAccess { |
| kUseCell, |
| kUseGeneric |
| }; |
| GlobalPropertyAccess LookupGlobalProperty(Variable* var, |
| LookupResult* lookup, |
| bool is_store); |
| |
| bool TryArgumentsAccess(Property* expr); |
| bool TryCallApply(Call* expr); |
| bool TryInline(Call* expr); |
| bool TryInlineBuiltinFunction(Call* expr, |
| HValue* receiver, |
| Handle<Map> receiver_map, |
| CheckType check_type); |
| |
| // If --trace-inlining, print a line of the inlining trace. Inlining |
| // succeeded if the reason string is NULL and failed if there is a |
| // non-NULL reason string. |
| void TraceInline(Handle<JSFunction> target, const char* failure_reason); |
| |
| void HandleGlobalVariableAssignment(Variable* var, |
| HValue* value, |
| int position, |
| int ast_id); |
| |
| void HandlePropertyAssignment(Assignment* expr); |
| void HandleCompoundAssignment(Assignment* expr); |
| void HandlePolymorphicLoadNamedField(Property* expr, |
| HValue* object, |
| ZoneMapList* types, |
| Handle<String> name); |
| void HandlePolymorphicStoreNamedField(Assignment* expr, |
| HValue* object, |
| HValue* value, |
| ZoneMapList* types, |
| Handle<String> name); |
| void HandlePolymorphicCallNamed(Call* expr, |
| HValue* receiver, |
| ZoneMapList* types, |
| Handle<String> name); |
| |
| HStringCharCodeAt* BuildStringCharCodeAt(HValue* string, |
| HValue* index); |
| HInstruction* BuildBinaryOperation(BinaryOperation* expr, |
| HValue* left, |
| HValue* right); |
| HInstruction* BuildIncrement(HValue* value, bool increment); |
| HLoadNamedField* BuildLoadNamedField(HValue* object, |
| Property* expr, |
| Handle<Map> type, |
| LookupResult* result, |
| bool smi_and_map_check); |
| HInstruction* BuildLoadNamedGeneric(HValue* object, Property* expr); |
| HInstruction* BuildLoadKeyedFastElement(HValue* object, |
| HValue* key, |
| Property* expr); |
| HInstruction* BuildLoadKeyedPixelArrayElement(HValue* object, |
| HValue* key, |
| Property* expr); |
| HInstruction* BuildLoadKeyedGeneric(HValue* object, |
| HValue* key); |
| |
| HInstruction* BuildLoadNamed(HValue* object, |
| Property* prop, |
| Handle<Map> map, |
| Handle<String> name); |
| HInstruction* BuildStoreNamed(HValue* object, |
| HValue* value, |
| Expression* expr); |
| HInstruction* BuildStoreNamedField(HValue* object, |
| Handle<String> name, |
| HValue* value, |
| Handle<Map> type, |
| LookupResult* lookup, |
| bool smi_and_map_check); |
| HInstruction* BuildStoreNamedGeneric(HValue* object, |
| Handle<String> name, |
| HValue* value); |
| HInstruction* BuildStoreKeyedGeneric(HValue* object, |
| HValue* key, |
| HValue* value); |
| |
| HInstruction* BuildStoreKeyedFastElement(HValue* object, |
| HValue* key, |
| HValue* val, |
| Expression* expr); |
| |
| HInstruction* BuildStoreKeyedPixelArrayElement(HValue* object, |
| HValue* key, |
| HValue* val, |
| Expression* expr); |
| |
| HValue* BuildContextChainWalk(Variable* var); |
| |
| void AddCheckConstantFunction(Call* expr, |
| HValue* receiver, |
| Handle<Map> receiver_map, |
| bool smi_and_map_check); |
| |
| |
| // The translation state of the currently-being-translated function. |
| FunctionState* function_state_; |
| |
| // The base of the function state stack. |
| FunctionState initial_function_state_; |
| |
| // Expression context of the currently visited subexpression. NULL when |
| // visiting statements. |
| AstContext* ast_context_; |
| |
| // A stack of breakable statements entered. |
| BreakAndContinueScope* break_scope_; |
| |
| HGraph* graph_; |
| HBasicBlock* current_block_; |
| |
| int inlined_count_; |
| |
| friend class FunctionState; // Pushes and pops the state stack. |
| friend class AstContext; // Pushes and pops the AST context stack. |
| |
| DISALLOW_COPY_AND_ASSIGN(HGraphBuilder); |
| }; |
| |
| |
| class HValueMap: public ZoneObject { |
| public: |
| HValueMap() |
| : array_size_(0), |
| lists_size_(0), |
| count_(0), |
| present_flags_(0), |
| array_(NULL), |
| lists_(NULL), |
| free_list_head_(kNil) { |
| ResizeLists(kInitialSize); |
| Resize(kInitialSize); |
| } |
| |
| void Kill(int flags); |
| |
| void Add(HValue* value) { |
| present_flags_ |= value->flags(); |
| Insert(value); |
| } |
| |
| HValue* Lookup(HValue* value) const; |
| HValueMap* Copy() const { return new HValueMap(this); } |
| |
| private: |
| // A linked list of HValue* values. Stored in arrays. |
| struct HValueMapListElement { |
| HValue* value; |
| int next; // Index in the array of the next list element. |
| }; |
| static const int kNil = -1; // The end of a linked list |
| |
| // Must be a power of 2. |
| static const int kInitialSize = 16; |
| |
| explicit HValueMap(const HValueMap* other); |
| |
| void Resize(int new_size); |
| void ResizeLists(int new_size); |
| void Insert(HValue* value); |
| uint32_t Bound(uint32_t value) const { return value & (array_size_ - 1); } |
| |
| int array_size_; |
| int lists_size_; |
| int count_; // The number of values stored in the HValueMap. |
| int present_flags_; // All flags that are in any value in the HValueMap. |
| HValueMapListElement* array_; // Primary store - contains the first value |
| // with a given hash. Colliding elements are stored in linked lists. |
| HValueMapListElement* lists_; // The linked lists containing hash collisions. |
| int free_list_head_; // Unused elements in lists_ are on the free list. |
| }; |
| |
| |
| class HStatistics: public Malloced { |
| public: |
| void Initialize(CompilationInfo* info); |
| void Print(); |
| void SaveTiming(const char* name, int64_t ticks, unsigned size); |
| static HStatistics* Instance() { |
| static SetOncePointer<HStatistics> instance; |
| if (!instance.is_set()) { |
| instance.set(new HStatistics()); |
| } |
| return instance.get(); |
| } |
| |
| private: |
| |
| HStatistics() |
| : timing_(5), |
| names_(5), |
| sizes_(5), |
| total_(0), |
| total_size_(0), |
| full_code_gen_(0), |
| source_size_(0) { } |
| |
| List<int64_t> timing_; |
| List<const char*> names_; |
| List<unsigned> sizes_; |
| int64_t total_; |
| unsigned total_size_; |
| int64_t full_code_gen_; |
| double source_size_; |
| }; |
| |
| |
| class HPhase BASE_EMBEDDED { |
| public: |
| static const char* const kFullCodeGen; |
| static const char* const kTotal; |
| |
| explicit HPhase(const char* name) { Begin(name, NULL, NULL, NULL); } |
| HPhase(const char* name, HGraph* graph) { |
| Begin(name, graph, NULL, NULL); |
| } |
| HPhase(const char* name, LChunk* chunk) { |
| Begin(name, NULL, chunk, NULL); |
| } |
| HPhase(const char* name, LAllocator* allocator) { |
| Begin(name, NULL, NULL, allocator); |
| } |
| |
| ~HPhase() { |
| End(); |
| } |
| |
| private: |
| void Begin(const char* name, |
| HGraph* graph, |
| LChunk* chunk, |
| LAllocator* allocator); |
| void End() const; |
| |
| int64_t start_; |
| const char* name_; |
| HGraph* graph_; |
| LChunk* chunk_; |
| LAllocator* allocator_; |
| unsigned start_allocation_size_; |
| }; |
| |
| |
| class HTracer: public Malloced { |
| public: |
| void TraceCompilation(FunctionLiteral* function); |
| void TraceHydrogen(const char* name, HGraph* graph); |
| void TraceLithium(const char* name, LChunk* chunk); |
| void TraceLiveRanges(const char* name, LAllocator* allocator); |
| |
| static HTracer* Instance() { |
| static SetOncePointer<HTracer> instance; |
| if (!instance.is_set()) { |
| instance.set(new HTracer("hydrogen.cfg")); |
| } |
| return instance.get(); |
| } |
| |
| private: |
| class Tag BASE_EMBEDDED { |
| public: |
| Tag(HTracer* tracer, const char* name) { |
| name_ = name; |
| tracer_ = tracer; |
| tracer->PrintIndent(); |
| tracer->trace_.Add("begin_%s\n", name); |
| tracer->indent_++; |
| } |
| |
| ~Tag() { |
| tracer_->indent_--; |
| tracer_->PrintIndent(); |
| tracer_->trace_.Add("end_%s\n", name_); |
| ASSERT(tracer_->indent_ >= 0); |
| tracer_->FlushToFile(); |
| } |
| |
| private: |
| HTracer* tracer_; |
| const char* name_; |
| }; |
| |
| explicit HTracer(const char* filename) |
| : filename_(filename), trace_(&string_allocator_), indent_(0) { |
| WriteChars(filename, "", 0, false); |
| } |
| |
| void TraceLiveRange(LiveRange* range, const char* type); |
| void Trace(const char* name, HGraph* graph, LChunk* chunk); |
| void FlushToFile(); |
| |
| void PrintEmptyProperty(const char* name) { |
| PrintIndent(); |
| trace_.Add("%s\n", name); |
| } |
| |
| void PrintStringProperty(const char* name, const char* value) { |
| PrintIndent(); |
| trace_.Add("%s \"%s\"\n", name, value); |
| } |
| |
| void PrintLongProperty(const char* name, int64_t value) { |
| PrintIndent(); |
| trace_.Add("%s %d000\n", name, static_cast<int>(value / 1000)); |
| } |
| |
| void PrintBlockProperty(const char* name, int block_id) { |
| PrintIndent(); |
| trace_.Add("%s \"B%d\"\n", name, block_id); |
| } |
| |
| void PrintBlockProperty(const char* name, int block_id1, int block_id2) { |
| PrintIndent(); |
| trace_.Add("%s \"B%d\" \"B%d\"\n", name, block_id1, block_id2); |
| } |
| |
| void PrintIntProperty(const char* name, int value) { |
| PrintIndent(); |
| trace_.Add("%s %d\n", name, value); |
| } |
| |
| void PrintIndent() { |
| for (int i = 0; i < indent_; i++) { |
| trace_.Add(" "); |
| } |
| } |
| |
| const char* filename_; |
| HeapStringAllocator string_allocator_; |
| StringStream trace_; |
| int indent_; |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_HYDROGEN_H_ |