Fix xcode build for real.

runtime/vm/flow_graph_compiler_mips.cc

 // Copyright (c) 2013, 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_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 36 matching lines @@
 bool FlowGraphCompiler::SupportsUnboxedSimd128() {
   return false;
 }
 
 
 bool FlowGraphCompiler::SupportsSinCos() {
   return false;
 }
 
 
+intptr_t FlowGraphCompiler::PlatformBlockedRegisterMask() {
+  COMPILE_ASSERT(TMP2 == kNoRegister);
+  return  1 << CTX | 1 << SPREG | 1 << FPREG | 1 << TMP | 1 << PP;
+}
+
+
 RawDeoptInfo* CompilerDeoptInfo::CreateDeoptInfo(FlowGraphCompiler* compiler,
                                                  DeoptInfoBuilder* builder,
                                                  const Array& deopt_table) {
   if (deopt_env_ == NULL) {
     return DeoptInfo::null();
   }
 
   intptr_t stack_height = compiler->StackSize();
   AllocateIncomingParametersRecursive(deopt_env_, &stack_height);
 
@@ skipping 1718 matching lines @@
   __ AddImmediate(SP, kDoubleSize);
 }
 
 
 #undef __
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS