Faster 64-bit right-shift for the ia32 compiler.

runtime/vm/intermediate_language_x64.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"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 2180 matching lines @@
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 void UnaryMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   UNIMPLEMENTED();
 }
 
 
+LocationSummary* ShiftMintOpInstr::MakeLocationSummary() const {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+void ShiftMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  UNIMPLEMENTED();
+}
+
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64