Merge 6168:6800 from bleeding_edge to experimental/gc branch.

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
===================================================================
--- src/x64/lithium-codegen-x64.h	(revision 6800)
+++ src/x64/lithium-codegen-x64.h	(working copy)
@@ -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:
@@ -30,33 +30,256 @@
 
 #include "x64/lithium-x64.h"
 
+#include "checks.h"
 #include "deoptimizer.h"
 #include "safepoint-table.h"
 #include "scopes.h"
+#include "x64/lithium-gap-resolver-x64.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class LDeferredCode;
+class SafepointGenerator;
 
 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),
+        resolver_(this) {
+    PopulateDeoptimizationLiteralsWithInlinedFunctions();
+  }
 
+  // Simple accessors.
+  MacroAssembler* masm() const { return masm_; }
+
+  // Support for converting LOperands to assembler types.
+  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;
+
+
   // 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 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(); }
+
+  int GetNextEmittedBlock(int block);
+  LInstruction* GetNextInstruction();
+
+  void EmitClassOfTest(Label* if_true,
+                       Label* if_false,
+                       Handle<String> class_name,
+                       Register input,
+                       Register temporary);
+
+  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;
+
+  // 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,
+                       Safepoint::Kind kind,
+                       int arguments,
+                       int deoptimization_index);
+  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,
+                         Label* is_not_object,
+                         Label* is_object);
+
+  // Emits optimized code for %_IsConstructCall().
+  // Caller should branch on equal condition.
+  void EmitIsConstructCall(Register temp);
+
+  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
 
 #endif  // V8_X64_LITHIUM_CODEGEN_X64_H_