Inline ordered relative compares of mixed double/undefined values.

src/ia32/ic-ia32.cc

 // 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 1708 matching lines @@
     ICCompareStub stub(op_, state);
     if (state == KNOWN_OBJECTS) {
       stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
     }
     rewritten = stub.GetCode();
   }
   set_target(*rewritten);
 
 #ifdef DEBUG
   if (FLAG_trace_ic) {
-    PrintF("[CompareIC (%s->%s)#%s]\n",
+    PrintF("[CompareIC in ");
+    JavaScriptFrame::PrintTop(stdout, false, true);

[fschneider, 2012/03/02 12:39:15]

Leftover from debugging?

[danno, 2012/03/02 13:28:45]

Done.

+    PrintF(" (%s->%s)#%s]\n",
            GetStateName(previous_state),
            GetStateName(state),
            Token::Name(op_));
   }
 #endif
 
   // Activate inlined smi code.
   if (previous_state == UNINITIALIZED) {
     PatchInlinedSmiCode(address());
   }
@@ skipping 29 matching lines @@
   Condition cc = *jmp_address == Assembler::kJncShortOpcode
       ? not_zero
       : zero;
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32