RFC: Switch to ast ids (instead of positions) for type feedback.

src/ia32/lithium-ia32.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 1846 matching lines @@
   }
 
   // Emit frame translation commands for this environment.
   void WriteTranslation(LCodeGen* cgen, Translation* translation) const;
 
   void PrintTo(StringStream* stream) const;
 
  private:
   Handle<JSFunction> closure_;
   int arguments_stack_height_;
-  int deoptimization_index_;
+  AstId deoptimization_index_;
   int translation_index_;
   int ast_id_;
   int parameter_count_;
   ZoneList<LOperand*> values_;
   ZoneList<Representation> representations_;
 
   // Allocation index indexed arrays of spill slot operands for registers
   // that are also in spill slots at an OSR entry.  NULL for environments
   // that do not correspond to an OSR entry.
   LOperand** spilled_registers_;
@@ skipping 69 matching lines @@
       : chunk_(NULL),
         graph_(graph),
         status_(UNUSED),
         current_instruction_(NULL),
         current_block_(NULL),
         next_block_(NULL),
         argument_count_(0),
         allocator_(allocator),
         position_(RelocInfo::kNoPosition),
         instructions_pending_deoptimization_environment_(NULL),
-        pending_deoptimization_ast_id_(AstNode::kNoNumber) { }
+        pending_deoptimization_ast_id_(kNoAstId) { }
 
   // Build the sequence for the graph.
   LChunk* Build();
 
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) LInstruction* Do##type(H##type* node);
   HYDROGEN_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
 #undef DECLARE_DO
 
  private:
@@ skipping 93 matching lines @@
   LChunk* chunk_;
   HGraph* const graph_;
   Status status_;
   HInstruction* current_instruction_;
   HBasicBlock* current_block_;
   HBasicBlock* next_block_;
   int argument_count_;
   LAllocator* allocator_;
   int position_;
   LInstruction* instructions_pending_deoptimization_environment_;
-  int pending_deoptimization_ast_id_;
+  AstId pending_deoptimization_ast_id_;
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_