Record AST ids in relocation info at spots where we collect dynamic type feedback.

src/arm/assembler-arm.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 1148 matching lines @@
   void BlockConstPoolFor(int instructions);
 
   // Debugging
 
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();
 
   // Mark address of a debug break slot.
   void RecordDebugBreakSlot();
 
+  // Record the AST id of the CallIC being compiled, so that it can be placed
+  // in the relocation information.
+  void RecordAstId(unsigned ast_id) { ast_id_for_reloc_info_ = ast_id; }
+
   // Record a comment relocation entry that can be used by a disassembler.
   // Use --code-comments to enable.
   void RecordComment(const char* msg);
 
   // Writes a single byte or word of data in the code stream.  Used
   // for inline tables, e.g., jump-tables. The constant pool should be
   // emitted before any use of db and dd to ensure that constant pools
   // are not emitted as part of the tables generated.
   void db(uint8_t data);
   void dd(uint32_t data);
@@ skipping 37 matching lines @@
   static bool IsCmpRegister(Instr instr);
   static bool IsCmpImmediate(Instr instr);
   static Register GetCmpImmediateRegister(Instr instr);
   static int GetCmpImmediateRawImmediate(Instr instr);
   static bool IsNop(Instr instr, int type = NON_MARKING_NOP);
 
   // Check if is time to emit a constant pool for pending reloc info entries
   void CheckConstPool(bool force_emit, bool require_jump);
 
  protected:
+  // Relocation for a type-recording IC has the AST id added to it.  This
+  // member variable is a way to pass the information from the call site to
+  // the relocation info.
+  unsigned ast_id_for_reloc_info_;
+
   bool emit_debug_code() const { return emit_debug_code_; }
 
   int buffer_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Read/patch instructions
   Instr instr_at(int pos) { return *reinterpret_cast<Instr*>(buffer_ + pos); }
   void instr_at_put(int pos, Instr instr) {
     *reinterpret_cast<Instr*>(buffer_ + pos) = instr;
   }
 
@@ skipping 79 matching lines @@
   // Relocation info records are also used during code generation as temporary
   // containers for constants and code target addresses until they are emitted
   // to the constant pool. These pending relocation info records are temporarily
   // stored in a separate buffer until a constant pool is emitted.
   // If every instruction in a long sequence is accessing the pool, we need one
   // pending relocation entry per instruction.
   static const int kMaxNumPRInfo = kMaxDistBetweenPools/kInstrSize;
   RelocInfo prinfo_[kMaxNumPRInfo];  // the buffer of pending relocation info
   int num_prinfo_;  // number of pending reloc info entries in the buffer
 
+
   // The bound position, before this we cannot do instruction elimination.
   int last_bound_pos_;
 
   // Code emission
   inline void CheckBuffer();
   void GrowBuffer();
   inline void emit(Instr x);
 
   // Instruction generation
   void addrmod1(Instr instr, Register rn, Register rd, const Operand& x);
@@ skipping 28 matching lines @@
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_