Version 3.0.8
Exposed heap size limit to the heap statistics gathered by the GetHeapStatistics API.
Wrapped external pointers more carefully (issue 1037).
Hardened the implementation of error objects to avoid setters intercepting the properties set then throwing an error.
Avoided trashing the FPSCR when calculating Math.floor on ARM.
Performance improvements on the IA32 platform.
git-svn-id: http://v8.googlecode.com/svn/trunk@6346 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index cd1f08d..8d1c5c4 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// 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:
@@ -30,6 +30,7 @@
#include "x64/lithium-x64.h"
+#include "checks.h"
#include "deoptimizer.h"
#include "safepoint-table.h"
#include "scopes.h"
@@ -39,22 +40,256 @@
// Forward declarations.
class LDeferredCode;
+class LGapNode;
+class SafepointGenerator;
+
+class LGapResolver BASE_EMBEDDED {
+ public:
+ LGapResolver();
+ const ZoneList<LMoveOperands>* Resolve(const ZoneList<LMoveOperands>* moves,
+ LOperand* marker_operand);
+
+ private:
+ LGapNode* LookupNode(LOperand* operand);
+ bool CanReach(LGapNode* a, LGapNode* b, int visited_id);
+ bool CanReach(LGapNode* a, LGapNode* b);
+ void RegisterMove(LMoveOperands move);
+ void AddResultMove(LOperand* from, LOperand* to);
+ void AddResultMove(LGapNode* from, LGapNode* to);
+ void ResolveCycle(LGapNode* start, LOperand* marker_operand);
+
+ ZoneList<LGapNode*> nodes_;
+ ZoneList<LGapNode*> identified_cycles_;
+ ZoneList<LMoveOperands> result_;
+ int next_visited_id_;
+};
+
class LCodeGen BASE_EMBEDDED {
public:
- LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info) { }
+ LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info)
+ : chunk_(chunk),
+ masm_(assembler),
+ info_(info),
+ current_block_(-1),
+ current_instruction_(-1),
+ instructions_(chunk->instructions()),
+ deoptimizations_(4),
+ deoptimization_literals_(8),
+ inlined_function_count_(0),
+ scope_(chunk->graph()->info()->scope()),
+ status_(UNUSED),
+ deferred_(8),
+ osr_pc_offset_(-1) {
+ PopulateDeoptimizationLiteralsWithInlinedFunctions();
+ }
// Try to generate code for the entire chunk, but it may fail if the
// chunk contains constructs we cannot handle. Returns true if the
// code generation attempt succeeded.
- bool GenerateCode() {
- UNIMPLEMENTED();
- return false;
- }
+ bool GenerateCode();
// Finish the code by setting stack height, safepoint, and bailout
// information on it.
- void FinishCode(Handle<Code> code) { UNIMPLEMENTED(); }
+ void FinishCode(Handle<Code> code);
+
+ // Deferred code support.
+ void DoDeferredNumberTagD(LNumberTagD* instr);
+ void DoDeferredNumberTagI(LNumberTagI* instr);
+ void DoDeferredTaggedToI(LTaggedToI* instr);
+ void DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr);
+ void DoDeferredStackCheck(LGoto* instr);
+ void DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
+ Label* map_check);
+
+ // Parallel move support.
+ void DoParallelMove(LParallelMove* move);
+
+ // Emit frame translation commands for an environment.
+ void WriteTranslation(LEnvironment* environment, Translation* translation);
+
+ // Declare methods that deal with the individual node types.
+#define DECLARE_DO(type) void Do##type(L##type* node);
+ LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
+#undef DECLARE_DO
+
+ private:
+ enum Status {
+ UNUSED,
+ GENERATING,
+ DONE,
+ ABORTED
+ };
+
+ bool is_unused() const { return status_ == UNUSED; }
+ bool is_generating() const { return status_ == GENERATING; }
+ bool is_done() const { return status_ == DONE; }
+ bool is_aborted() const { return status_ == ABORTED; }
+
+ LChunk* chunk() const { return chunk_; }
+ Scope* scope() const { return scope_; }
+ HGraph* graph() const { return chunk_->graph(); }
+ MacroAssembler* masm() const { return masm_; }
+
+ int GetNextEmittedBlock(int block);
+ LInstruction* GetNextInstruction();
+
+ void EmitClassOfTest(Label* if_true,
+ Label* if_false,
+ Handle<String> class_name,
+ Register input,
+ Register temporary,
+ Register temporary2);
+
+ int StackSlotCount() const { return chunk()->spill_slot_count(); }
+ int ParameterCount() const { return scope()->num_parameters(); }
+
+ void Abort(const char* format, ...);
+ void Comment(const char* format, ...);
+
+ void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code); }
+
+ // Code generation passes. Returns true if code generation should
+ // continue.
+ bool GeneratePrologue();
+ bool GenerateBody();
+ bool GenerateDeferredCode();
+ bool GenerateSafepointTable();
+
+ void CallCode(Handle<Code> code,
+ RelocInfo::Mode mode,
+ LInstruction* instr);
+ void CallRuntime(Runtime::Function* function,
+ int num_arguments,
+ LInstruction* instr);
+ void CallRuntime(Runtime::FunctionId id,
+ int num_arguments,
+ LInstruction* instr) {
+ Runtime::Function* function = Runtime::FunctionForId(id);
+ CallRuntime(function, num_arguments, instr);
+ }
+
+ // Generate a direct call to a known function. Expects the function
+ // to be in edi.
+ void CallKnownFunction(Handle<JSFunction> function,
+ int arity,
+ LInstruction* instr);
+
+ void LoadHeapObject(Register result, Handle<HeapObject> object);
+
+ void RegisterLazyDeoptimization(LInstruction* instr);
+ void RegisterEnvironmentForDeoptimization(LEnvironment* environment);
+ void DeoptimizeIf(Condition cc, LEnvironment* environment);
+
+ void AddToTranslation(Translation* translation,
+ LOperand* op,
+ bool is_tagged);
+ void PopulateDeoptimizationData(Handle<Code> code);
+ int DefineDeoptimizationLiteral(Handle<Object> literal);
+
+ void PopulateDeoptimizationLiteralsWithInlinedFunctions();
+
+ Register ToRegister(int index) const;
+ XMMRegister ToDoubleRegister(int index) const;
+ Register ToRegister(LOperand* op) const;
+ XMMRegister ToDoubleRegister(LOperand* op) const;
+ bool IsInteger32Constant(LConstantOperand* op) const;
+ int ToInteger32(LConstantOperand* op) const;
+ bool IsTaggedConstant(LConstantOperand* op) const;
+ Handle<Object> ToHandle(LConstantOperand* op) const;
+ Operand ToOperand(LOperand* op) const;
+
+ // Specific math operations - used from DoUnaryMathOperation.
+ void DoMathAbs(LUnaryMathOperation* instr);
+ void DoMathFloor(LUnaryMathOperation* instr);
+ void DoMathRound(LUnaryMathOperation* instr);
+ void DoMathSqrt(LUnaryMathOperation* instr);
+ void DoMathPowHalf(LUnaryMathOperation* instr);
+ void DoMathLog(LUnaryMathOperation* instr);
+ void DoMathCos(LUnaryMathOperation* instr);
+ void DoMathSin(LUnaryMathOperation* instr);
+
+ // Support for recording safepoint and position information.
+ void RecordSafepoint(LPointerMap* pointers, int deoptimization_index);
+ void RecordSafepointWithRegisters(LPointerMap* pointers,
+ int arguments,
+ int deoptimization_index);
+ void RecordPosition(int position);
+
+ static Condition TokenToCondition(Token::Value op, bool is_unsigned);
+ void EmitGoto(int block, LDeferredCode* deferred_stack_check = NULL);
+ void EmitBranch(int left_block, int right_block, Condition cc);
+ void EmitCmpI(LOperand* left, LOperand* right);
+ void EmitNumberUntagD(Register input, XMMRegister result, LEnvironment* env);
+
+ // Emits optimized code for typeof x == "y". Modifies input register.
+ // Returns the condition on which a final split to
+ // true and false label should be made, to optimize fallthrough.
+ Condition EmitTypeofIs(Label* true_label, Label* false_label,
+ Register input, Handle<String> type_name);
+
+ // Emits optimized code for %_IsObject(x). Preserves input register.
+ // Returns the condition on which a final split to
+ // true and false label should be made, to optimize fallthrough.
+ Condition EmitIsObject(Register input,
+ Register temp1,
+ Register temp2,
+ Label* is_not_object,
+ Label* is_object);
+
+ LChunk* const chunk_;
+ MacroAssembler* const masm_;
+ CompilationInfo* const info_;
+
+ int current_block_;
+ int current_instruction_;
+ const ZoneList<LInstruction*>* instructions_;
+ ZoneList<LEnvironment*> deoptimizations_;
+ ZoneList<Handle<Object> > deoptimization_literals_;
+ int inlined_function_count_;
+ Scope* const scope_;
+ Status status_;
+ TranslationBuffer translations_;
+ ZoneList<LDeferredCode*> deferred_;
+ int osr_pc_offset_;
+
+ // Builder that keeps track of safepoints in the code. The table
+ // itself is emitted at the end of the generated code.
+ SafepointTableBuilder safepoints_;
+
+ // Compiler from a set of parallel moves to a sequential list of moves.
+ LGapResolver resolver_;
+
+ friend class LDeferredCode;
+ friend class LEnvironment;
+ friend class SafepointGenerator;
+ DISALLOW_COPY_AND_ASSIGN(LCodeGen);
+};
+
+
+class LDeferredCode: public ZoneObject {
+ public:
+ explicit LDeferredCode(LCodeGen* codegen)
+ : codegen_(codegen), external_exit_(NULL) {
+ codegen->AddDeferredCode(this);
+ }
+
+ virtual ~LDeferredCode() { }
+ virtual void Generate() = 0;
+
+ void SetExit(Label *exit) { external_exit_ = exit; }
+ Label* entry() { return &entry_; }
+ Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; }
+
+ protected:
+ LCodeGen* codegen() const { return codegen_; }
+ MacroAssembler* masm() const { return codegen_->masm(); }
+
+ private:
+ LCodeGen* codegen_;
+ Label entry_;
+ Label exit_;
+ Label* external_exit_;
};
} } // namespace v8::internal