Use optimized code map to cache OSR code.

src/compiler.h

 // Copyright 2012 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 66 matching lines @@
   Scope* global_scope() const { return global_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_; }
   HydrogenCodeStub* code_stub() const {return code_stub_; }
   v8::Extension* extension() const { return extension_; }
   ScriptDataImpl* pre_parse_data() const { return pre_parse_data_; }
   Handle<Context> context() const { return context_; }
   BailoutId osr_ast_id() const { return osr_ast_id_; }
-  uint32_t osr_pc_offset() const { return osr_pc_offset_; }
   int opt_count() const { return opt_count_; }
   int num_parameters() const;
   int num_heap_slots() const;
   Code::Flags flags() const;
 
   void MarkAsEval() {
     ASSERT(!is_lazy());
     flags_ |= IsEval::encode(true);
   }
   void MarkAsGlobal() {
@@ skipping 206 matching lines @@
   void AbortDueToDependencyChange() {
     ASSERT(!OptimizingCompilerThread::IsOptimizerThread(isolate()));
     abort_due_to_dependency_ = true;
   }
 
   bool HasAbortedDueToDependencyChange() {
     ASSERT(!OptimizingCompilerThread::IsOptimizerThread(isolate()));
     return abort_due_to_dependency_;
   }
 
-  void set_osr_pc_offset(uint32_t pc_offset) {
-    osr_pc_offset_ = pc_offset;
-  }
-
-  bool HasSameOsrEntry(Handle<JSFunction> function, uint32_t pc_offset) {
-    return osr_pc_offset_ == pc_offset && function.is_identical_to(closure_);
+  bool HasSameOsrEntry(Handle<JSFunction> function, BailoutId osr_ast_id) {
+    return osr_ast_id == osr_ast_id_ && function.is_identical_to(closure_);
   }
 
  protected:
   CompilationInfo(Handle<Script> script,
                   Zone* zone);
   CompilationInfo(Handle<SharedFunctionInfo> shared_info,
                   Zone* zone);
   CompilationInfo(HydrogenCodeStub* stub,
                   Isolate* isolate,
                   Zone* zone);
@@ skipping 76 matching lines @@
   v8::Extension* extension_;
   ScriptDataImpl* pre_parse_data_;
 
   // The context of the caller for eval code, and the global context for a
   // global script. Will be a null handle otherwise.
   Handle<Context> context_;
 
   // Compilation mode flag and whether deoptimization is allowed.
   Mode mode_;
   BailoutId osr_ast_id_;
-  // The pc_offset corresponding to osr_ast_id_ in unoptimized code.
-  // We can look this up in the back edge table, but cache it for quick access.
-  uint32_t osr_pc_offset_;
 
   // Flag whether compilation needs to be aborted due to dependency change.
   bool abort_due_to_dependency_;
 
   // The zone from which the compilation pipeline working on this
   // CompilationInfo allocates.
   Zone* zone_;
 
   DeferredHandles* deferred_handles_;
 
@@ skipping 190 matching lines @@
                                                 bool is_global,
                                                 LanguageMode language_mode,
                                                 ParseRestriction restriction,
                                                 int scope_position);
 
   // Compile from function info (used for lazy compilation). Returns true on
   // success and false if the compilation resulted in a stack overflow.
   static bool CompileLazy(CompilationInfo* info);
 
   static bool RecompileConcurrent(Handle<JSFunction> function,
-                                  uint32_t osr_pc_offset = 0);
+                                  BailoutId osr_ast_id = BailoutId::None());
 
   // Compile a shared function info object (the function is possibly lazily
   // compiled).
   static Handle<SharedFunctionInfo> BuildFunctionInfo(FunctionLiteral* node,
                                                       Handle<Script> script);
 
   // Set the function info for a newly compiled function.
   static void SetFunctionInfo(Handle<SharedFunctionInfo> function_info,
                               FunctionLiteral* lit,
                               bool is_toplevel,
@@ skipping 31 matching lines @@
   unsigned info_zone_start_allocation_size_;
   ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_