Fix handling of -0 in the unary-op IC and avoid repeated patching/transitions.

src/x64/code-stubs-x64.cc

 // Copyright 2011 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 506 matching lines @@
     case Token::BIT_NOT:
       GenerateHeapNumberStubBitNot(masm);
       break;
     default:
       UNREACHABLE();
   }
 }
 
 
 void TypeRecordingUnaryOpStub::GenerateHeapNumberStubSub(MacroAssembler* masm) {
-  Label non_smi, slow;
-  GenerateSmiCodeSub(masm, &non_smi, &slow, Label::kNear);
+  Label non_smi, slow, call_builtin;
+  GenerateSmiCodeSub(masm, &non_smi, &call_builtin, Label::kNear);
   __ bind(&non_smi);
   GenerateHeapNumberCodeSub(masm, &slow);
   __ bind(&slow);
   GenerateTypeTransition(masm);
+  __ bind(&call_builtin);
+  GenerateGenericCodeFallback(masm);
 }
 
 
 void TypeRecordingUnaryOpStub::GenerateHeapNumberStubBitNot(
     MacroAssembler* masm) {
   Label non_smi, slow;
   GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear);
   __ bind(&non_smi);
   GenerateHeapNumberCodeBitNot(masm, &slow);
   __ bind(&slow);
@@ skipping 4579 matching lines @@
   __ Drop(1);
   __ ret(2 * kPointerSize);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64