Make not sucking at regexp the default...

src/x64/builtins-x64.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 1194 matching lines @@
   __ push(rdx);
   __ push(r8);
 
   // Load the number of arguments and setup pointer to the arguments.
   __ movq(rax, r9);
   // Load the previous frame pointer to access C argument on stack
   __ movq(kScratchRegister, Operand(rbp, 0));
   __ movq(rbx, Operand(kScratchRegister, EntryFrameConstants::kArgvOffset));
   // Load the function pointer into rdi.
   __ movq(rdi, rdx);
-#else  // !defined(_WIN64)
+#else  // _WIN64
   // GCC parameters in:
   // rdi : entry (ignored)
   // rsi : function
   // rdx : receiver
   // rcx : argc
   // r8  : argv
 
   __ movq(rdi, rsi);
   // rdi : function
 
@@ skipping 63 matching lines @@
 void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, false);
 }
 
 
 void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, true);
 }
 
 } }  // namespace v8::internal