v8/src/x64/lithium-codegen-x64.h

// Copyright 2011 the V8 project authors. All rights reserved.
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#ifndef V8_X64_LITHIUM_CODEGEN_X64_H_
#define V8_X64_LITHIUM_CODEGEN_X64_H_

#include "x64/lithium-x64.h"

#include "deoptimizer.h"
#include "safepoint-table.h"
#include "scopes.h"

namespace v8 {
namespace internal {

// Forward declarations.
class LDeferredCode;
class SafepointGenerator;

class LCodeGen BASE_EMBEDDED {
 public:
  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;
  }


  // Finish the code by setting stack height, safepoint, and bailout
  // information on it.
  void FinishCode(Handle<Code> code) { UNIMPLEMENTED(); }

  // 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) {
    UNIMPLEMENTED();
    return 0;
  }
  LInstruction* GetNextInstruction() {
    UNIMPLEMENTED();
    return NULL;
  }

  void EmitClassOfTest(Label* if_true,
                       Label* if_false,
                       Handle<String> class_name,
                       Register input,
                       Register temporary,
                       Register temporary2) { UNIMPLEMENTED(); }

  int StackSlotCount() const { return chunk()->spill_slot_count(); }
  int ParameterCount() const { return scope()->num_parameters(); }

  void Abort(const char* format, ...) { UNIMPLEMENTED(); }
  void Comment(const char* format, ...) { UNIMPLEMENTED(); }

  void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code); }

  // Code generation passes.  Returns true if code generation should
  // continue.
  bool GeneratePrologue() {
    UNIMPLEMENTED();
    return true;
  }
  bool GenerateBody() {
    UNIMPLEMENTED();
    return true;
  }
  bool GenerateDeferredCode() {
    UNIMPLEMENTED();
    return true;
  }
  bool GenerateSafepointTable() {
    UNIMPLEMENTED();
    return true;
  }

  void CallCode(Handle<Code> code,
                RelocInfo::Mode mode,
                LInstruction* instr) { UNIMPLEMENTED(); }
  void CallRuntime(Runtime::Function* function,
                   int num_arguments,
                   LInstruction* instr) { UNIMPLEMENTED(); }
  void CallRuntime(Runtime::FunctionId id,
                   int num_arguments,
                   LInstruction* instr) {
    Runtime::Function* function = Runtime::FunctionForId(id);
    CallRuntime(function, num_arguments, instr);
  }

  void DeoptimizeIf(Condition cc, LEnvironment* environment) {
    UNIMPLEMENTED();
  }

  void AddToTranslation(Translation* translation,
                        LOperand* op,
                        bool is_tagged) { UNIMPLEMENTED(); }

  int DefineDeoptimizationLiteral(Handle<Object> literal) {
    UNIMPLEMENTED();
    return 0;
  }
  void PopulateDeoptimizationLiteralsWithInlinedFunctions() { UNIMPLEMENTED(); }

  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_;

  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_