Fix build break.

runtime/vm/assembler_x64_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/os.h"
 #include "vm/unit_test.h"
@@ skipping 2199 matching lines @@
   __ StoreObject(Address(RSP, 0), obj, PP);
   __ popq(RCX);
   __ CompareObject(RCX, obj, PP);
   __ j(NOT_EQUAL, &fail);
   __ pushq(RAX);
   __ StoreObject(Address(RSP, 0), smi, PP);
   __ popq(RCX);
   __ CompareObject(RCX, smi, PP);
   __ j(NOT_EQUAL, &fail);
   __ movl(RAX, Immediate(1));  // OK
+  __ popq(PP);  // Restore caller's pool pointer.
   __ LeaveFrame();
   __ ret();
   __ Bind(&fail);
   __ movl(RAX, Immediate(0));  // Fail.
   __ popq(PP);  // Restore caller's pool pointer.
   __ LeaveFrame();
   __ ret();
 }
 
 
@@ skipping 425 matching lines @@
   EXPECT_EQ(1, res);  // Greater equal.
   res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(5, 5);
   EXPECT_EQ(1, res);  // Greater equal.
   res = reinterpret_cast<ConditionalMovesCompareCode>(test->entry())(2, 5);
   EXPECT_EQ(-1, res);  // Less.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64