Fix the debugger in multipass mode by introducing phantome...

src/ia32/cfg-ia32.cc

 // Copyright 2009 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 95 matching lines @@
     __ CallRuntime(Runtime::kTraceExit, 1);
   }
   __ RecordJSReturn();
   __ mov(esp, ebp);
   __ pop(ebp);
   int count = CfgGlobals::current()->fun()->scope()->num_parameters();
   __ ret((count + 1) * kPointerSize);
 }
 
 
+void PositionInstr::Compile(MacroAssembler* masm) {
+  if (FLAG_debug_info && pos_ != RelocInfo::kNoPosition) {
+    __ RecordStatementPosition(pos_);
+    __ RecordPosition(pos_);
+  }
+}
+
+
 void BinaryOpInstr::Compile(MacroAssembler* masm) {
   // The right-hand value should not be on the stack---if it is a
   // compiler-generated temporary it is in the accumulator.
   ASSERT(!val1_->is_on_stack());
 
   Comment cmnt(masm, "[ BinaryOpInstr");
   // We can overwrite one of the operands if it is a temporary.
   OverwriteMode mode = NO_OVERWRITE;
   if (val0_->is_temporary()) {
     mode = OVERWRITE_LEFT;
@@ skipping 101 matching lines @@
     case NOWHERE:
       UNREACHABLE();
       break;
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal