Merge r7000 from the bleeding_edge to 2.5 branch.

src/ia32/codegen-ia32.cc

 // 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 8248 matching lines @@
     if (in_safe_int32_mode()) {
       Visit(node->expression());
       Result value = frame_->Pop();
       ASSERT(value.is_untagged_int32());
       // Registers containing an int32 value are not multiply used.
       ASSERT(!value.is_register() || !frame_->is_used(value.reg()));
       value.ToRegister();
       switch (op) {
         case Token::SUB: {
           __ neg(value.reg());
+          frame_->Push(&value);
           if (node->no_negative_zero()) {
             // -MIN_INT is MIN_INT with the overflow flag set.
             unsafe_bailout_->Branch(overflow);
           } else {
             // MIN_INT and 0 both have bad negations.  They both have 31 zeros.
             __ test(value.reg(), Immediate(0x7FFFFFFF));
             unsafe_bailout_->Branch(zero);
           }
           break;
         }
         case Token::BIT_NOT: {
           __ not_(value.reg());
+          frame_->Push(&value);
           break;
         }
         case Token::ADD: {
           // Unary plus has no effect on int32 values.
+          frame_->Push(&value);
           break;
         }
         default:
           UNREACHABLE();
           break;
       }
-      frame_->Push(&value);
     } else {
       Load(node->expression());
       bool can_overwrite = node->expression()->ResultOverwriteAllowed();
       UnaryOverwriteMode overwrite =
           can_overwrite ? UNARY_OVERWRITE : UNARY_NO_OVERWRITE;
       bool no_negative_zero = node->expression()->no_negative_zero();
       switch (op) {
         case Token::NOT:
         case Token::DELETE:
         case Token::TYPEOF:
@@ skipping 1977 matching lines @@
   masm.GetCode(&desc);
   // Call the function from C++.
   return FUNCTION_CAST<MemCopyFunction>(buffer);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32