Defer the writing of the source position data to the relocation information...

src/assembler-ia32.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 655 matching lines @@
 
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();
 
   // Record a comment relocation entry that can be used by a disassembler.
   // Use --debug_code to enable.
   void RecordComment(const char* msg);
 
   void RecordPosition(int pos);
   void RecordStatementPosition(int pos);
+  void WriteRecordedPositions();
 
   int pc_offset() const  { return pc_ - buffer_; }
+  int last_statement_position() const  { return last_statement_position_; }
   int last_position() const  { return last_position_; }
-  bool last_position_is_statement() const  {
-    return last_position_is_statement_;
-  }
 
   // Check if there is less than kGap bytes available in the buffer.
   // If this is the case, we need to grow the buffer before emitting
   // an instruction or relocation information.
   inline bool overflow() const { return pc_ >= reloc_info_writer.pos() - kGap; }
 
   // Get the number of bytes available in the buffer.
   inline int available_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Avoid overflows for displacements etc.
@@ skipping 26 matching lines @@
   // Jump-to-jump elimination:
   // The last label to be bound to _binding_pos, if unbound.
   Label unbound_label_;
   // The position to which _unbound_label has to be bound, if present.
   int binding_pos_;
   // The position before which jumps cannot be eliminated.
   int last_bound_pos_;
 
   // source position information
   int last_position_;
-  bool last_position_is_statement_;
+  int last_statement_position_;
 
   byte* addr_at(int pos)  { return buffer_ + pos; }
   byte byte_at(int pos)  { return buffer_[pos]; }
   uint32_t long_at(int pos)  {
     return *reinterpret_cast<uint32_t*>(addr_at(pos));
   }
   void long_at_put(int pos, uint32_t x)  {
     *reinterpret_cast<uint32_t*>(addr_at(pos)) = x;
   }
 
@@ skipping 59 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_IA32_H_