X64 Crankshaft: Fix another error in pushed registers at safepoints.

src/x64/macro-assembler-x64.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
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@@ skipping 1425 matching lines @@
   push(rdi);
   push(r8);
   push(r9);
   // r10 is kScratchRegister.
   push(r11);
   push(r12);
   // r13 is kRootRegister.
   push(r14);
   // r15 is kSmiConstantRegister
   STATIC_ASSERT(11 == kNumSafepointSavedRegisters);
-  subq(rsp, Immediate(
-      (kNumSafepointRegisters-kNumSafepointSavedRegisters) * kPointerSize));
+  // Use lea for symmetry with Popad.
+  lea(rsp, Operand(rsp,
+      -(kNumSafepointRegisters-kNumSafepointSavedRegisters) * kPointerSize));
 }
 
 
 void MacroAssembler::Popad() {
-  addq(rsp, Immediate(
+  // Popad must not change the flags, so use lea instead of addq.
+  lea(rsp, Operand(rsp,
       (kNumSafepointRegisters-kNumSafepointSavedRegisters) * kPointerSize));
   pop(r14);
   pop(r12);
   pop(r11);
   pop(r9);
   pop(r8);
   pop(rdi);
   pop(rsi);
   pop(rbx);
   pop(rdx);
@@ skipping 1042 matching lines @@
   CPU::FlushICache(address_, size_);
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64