X64: fix arguments adaptor stack check after r20751.

src/x64/builtins-x64.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 1322 matching lines @@
   // interruptions (e.g. debug break and preemption) here, so the "real stack
   // limit" is checked.
   Label okay;
   __ LoadRoot(rdx, Heap::kRealStackLimitRootIndex);
   __ movp(rcx, rsp);
   // Make rcx the space we have left. The stack might already be overflowed
   // here which will cause rcx to become negative.
   __ subp(rcx, rdx);
   // Make rdx the space we need for the array when it is unrolled onto the
   // stack.
-  __ PositiveSmiTimesPowerOfTwoToInteger64(rdx, rax, kPointerSizeLog2);
+  __ movp(rdx, rbx);
+  __ shlp(rdx, Immediate(kPointerSizeLog2));
   // Check if the arguments will overflow the stack.
   __ cmpp(rcx, rdx);
   __ j(less_equal, stack_overflow);  // Signed comparison.
 }
 
 
 static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
   __ pushq(rbp);
   __ movp(rbp, rsp);
 
@@ skipping 175 matching lines @@
   __ bind(&ok);
   __ ret(0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64