[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/compiler.h

 // Copyright 2010 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
@@ skipping 45 matching lines @@
   bool is_in_loop() const { return (flags_ & IsInLoop::mask()) != 0; }
   FunctionLiteral* function() const { return function_; }
   Scope* scope() const { return scope_; }
   Handle<Code> code() const { return code_; }
   Handle<JSFunction> closure() const { return closure_; }
   Handle<SharedFunctionInfo> shared_info() const { return shared_info_; }
   Handle<Script> script() const { return script_; }
   v8::Extension* extension() const { return extension_; }
   ScriptDataImpl* pre_parse_data() const { return pre_parse_data_; }
   Handle<Context> calling_context() const { return calling_context_; }
+  int osr_ast_id() const { return osr_ast_id_; }
 
   void MarkAsEval() {
     ASSERT(!is_lazy());
     flags_ |= IsEval::encode(true);
   }
   void MarkAsGlobal() {
     ASSERT(!is_lazy());
     flags_ |= IsGlobal::encode(true);
   }
   void MarkAsInLoop() {
@@ skipping 14 matching lines @@
     extension_ = extension;
   }
   void SetPreParseData(ScriptDataImpl* pre_parse_data) {
     ASSERT(!is_lazy());
     pre_parse_data_ = pre_parse_data;
   }
   void SetCallingContext(Handle<Context> context) {
     ASSERT(is_eval());
     calling_context_ = context;
   }
+  void SetOsrAstId(int osr_ast_id) {
+    ASSERT(IsOptimizing());
+    osr_ast_id_ = osr_ast_id;
+  }
+
+  bool has_global_object() const {
+    return !closure().is_null() && (closure()->context()->global() != NULL);
+  }
+
+  GlobalObject* global_object() const {
+    return has_global_object() ? closure()->context()->global() : NULL;
+  }
+
+  // Accessors for the different compilation modes.
+  bool IsOptimizing() const { return mode_ == OPTIMIZE; }
+  bool IsOptimizable() const { return mode_ == BASE; }
+  void SetOptimizing(int osr_ast_id) {
+    SetMode(OPTIMIZE);
+    osr_ast_id_ = osr_ast_id;
+  }
+  void DisableOptimization() { SetMode(NONOPT); }
+
+  // Deoptimization support.
+  bool HasDeoptimizationSupport() const { return supports_deoptimization_; }
+  void EnableDeoptimizationSupport() {
+    ASSERT(IsOptimizable());
+    supports_deoptimization_ = true;
+  }
+
+  // Determine whether or not we can adaptively optimize.
+  bool AllowOptimize() {
+    return V8::UseCrankshaft() &&
+           !closure_.is_null() &&
+           function_->AllowOptimize();
+  }
 
  private:
   Isolate* isolate_;
 
+  // Compilation mode.
+  // BASE is generated by the full codegen, optionally prepared for bailouts.
+  // OPTIMIZE is optimized code generated by the Hydrogen-based backend.
+  // NONOPT is generated by the full codegen or the classic backend
+  //   and is not prepared for recompilation/bailouts. These functions
+  //   are never recompiled.
+  enum Mode {
+    BASE,
+    OPTIMIZE,
+    NONOPT
+  };
+
+  CompilationInfo() : function_(NULL) {}
+
+  void Initialize(Mode mode) {
+    mode_ = V8::UseCrankshaft() ? mode : NONOPT;
+  }
+
+  void SetMode(Mode mode) {
+    ASSERT(V8::UseCrankshaft());
+    mode_ = mode;
+  }
+
   // Flags using template class BitField<type, start, length>.  All are
   // false by default.
   //
   // Compilation is either eager or lazy.
   class IsLazy:   public BitField<bool, 0, 1> {};
   // Flags that can be set for eager compilation.
   class IsEval:   public BitField<bool, 1, 1> {};
   class IsGlobal: public BitField<bool, 2, 1> {};
   // Flags that can be set for lazy compilation.
   class IsInLoop: public BitField<bool, 3, 1> {};
@@ skipping 15 matching lines @@
   Handle<Script> script_;
 
   // Fields possibly needed for eager compilation, NULL by default.
   v8::Extension* extension_;
   ScriptDataImpl* pre_parse_data_;
 
   // The context of the caller is needed for eval code, and will be a null
   // handle otherwise.
   Handle<Context> calling_context_;
 
+  // Compilation mode flag and whether deoptimization is allowed.
+  Mode mode_;
+  bool supports_deoptimization_;
+  int osr_ast_id_;
+
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
 
 // The V8 compiler
 //
 // General strategy: Source code is translated into an anonymous function w/o
 // parameters which then can be executed. If the source code contains other
 // functions, they will be compiled and allocated as part of the compilation
 // of the source code.
@@ skipping 35 matching lines @@
   // Set the function info for a newly compiled function.
   static void SetFunctionInfo(Handle<SharedFunctionInfo> function_info,
                               FunctionLiteral* lit,
                               bool is_toplevel,
                               Handle<Script> script);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   static bool MakeCodeForLiveEdit(CompilationInfo* info);
 #endif
 
- private:
   static void RecordFunctionCompilation(Logger::LogEventsAndTags tag,
                                         Handle<String> name,
                                         int start_position,
                                         CompilationInfo* info);
 };
 
 
 // During compilation we need a global list of handles to constants
 // for frame elements.  When the zone gets deleted, we make sure to
 // clear this list of handles as well.
 class CompilationZoneScope : public ZoneScope {
  public:
   explicit CompilationZoneScope(ZoneScopeMode mode) : ZoneScope(mode) { }
   virtual ~CompilationZoneScope() {
     if (ShouldDeleteOnExit()) {
       Isolate* isolate = Isolate::Current();
       isolate->frame_element_constant_list()->Clear();
       isolate->result_constant_list()->Clear();
     }
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_