v8/src/fast-codegen.h

// Copyright 2010 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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#ifndef V8_FAST_CODEGEN_H_
#define V8_FAST_CODEGEN_H_

#include "v8.h"

#include "ast.h"
#include "compiler.h"

namespace v8 {
namespace internal {

class FastCodeGenSyntaxChecker: public AstVisitor {
 public:
  explicit FastCodeGenSyntaxChecker()
      : info_(NULL), has_supported_syntax_(true) {
  }

  void Check(CompilationInfo* info);

  CompilationInfo* info() { return info_; }
  bool has_supported_syntax() { return has_supported_syntax_; }

 private:
  void VisitDeclarations(ZoneList<Declaration*>* decls);
  void VisitStatements(ZoneList<Statement*>* stmts);

  // AST node visit functions.
#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
  AST_NODE_LIST(DECLARE_VISIT)
#undef DECLARE_VISIT

  CompilationInfo* info_;
  bool has_supported_syntax_;

  DISALLOW_COPY_AND_ASSIGN(FastCodeGenSyntaxChecker);
};


class FastCodeGenerator: public AstVisitor {
 public:
  explicit FastCodeGenerator(MacroAssembler* masm) : masm_(masm), info_(NULL) {}

  static Handle<Code> MakeCode(CompilationInfo* info);

  void Generate(CompilationInfo* compilation_info);

 private:
  MacroAssembler* masm() { return masm_; }
  CompilationInfo* info() { return info_; }
  Label* bailout() { return &bailout_; }

  FunctionLiteral* function() { return info_->function(); }
  Scope* scope() { return info_->scope(); }

  // Platform-specific fixed registers, all guaranteed distinct.
  Register accumulator0();
  Register accumulator1();
  Register scratch0();
  Register scratch1();
  Register receiver_reg();
  Register context_reg();

  // AST node visit functions.
#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
  AST_NODE_LIST(DECLARE_VISIT)
#undef DECLARE_VISIT

  // Emit code to load the receiver from the stack into the fixed receiver
  // register.
  void EmitLoadReceiver();

  // Emit code to check that the receiver has the same map as the
  // compile-time receiver.  Receiver is expected in {ia32-edx, x64-rdx,
  // arm-r1}.  Emit a branch to the (single) bailout label if check fails.
  void EmitReceiverMapCheck();

  // Emit code to check that the global object has the same map as the
  // global object seen at compile time.
  void EmitGlobalMapCheck();

  // Emit code to load a global variable directly from a global
  // property cell into {ia32-eax, x64-rax, arm-r0}.
  void EmitGlobalVariableLoad(Handle<Object> cell);

  // Emit a store to an own property of this.  The stored value is expected
  // in {ia32-eax, x64-rax, arm-r0} and the receiver in {is32-edx, x64-rdx,
  // arm-r1}.  Both are preserve.
  void EmitThisPropertyStore(Handle<String> name);

  MacroAssembler* masm_;

  CompilationInfo* info_;

  Label bailout_;

  DISALLOW_COPY_AND_ASSIGN(FastCodeGenerator);
};


} }  // namespace v8::internal

#endif  // V8_FAST_CODEGEN_H_