Adds support for UseDartApi vm test on MIPS.

runtime/vm/stub_code_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"
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/dart_entry.h"
@@ skipping 966 matching lines @@
 void StubCode::GenerateJumpToErrorHandlerStub(Assembler* assembler) {
   __ Unimplemented("JumpToErrorHandler Stub");
 }
 
 
 void StubCode::GenerateEqualityWithNullArgStub(Assembler* assembler) {
   __ Unimplemented("EqualityWithNullArg Stub");
 }
 
 
+// Calls to the runtime to optimize the given function.
+// T0: function to be reoptimized.
+// S4: argument descriptor (preserved).
 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
-  __ Unimplemented("OptimizeFunction Stub");
+  __ EnterStubFrame();
+  __ Push(S4);
+  __ LoadImmediate(TMP, reinterpret_cast<intptr_t>(Object::null()));
+  __ Push(TMP);  // Setup space on stack for return value.
+  __ Push(T0);
+  __ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry);
+  __ Pop(T0);  // Discard argument.
+  __ Pop(T0);  // Get Code object
+  __ Pop(S4);  // Restore argument descriptor.
+  __ lw(T0, FieldAddress(T0, Code::instructions_offset()));
+  __ AddImmediate(T0, Instructions::HeaderSize() - kHeapObjectTag);
+  __ LeaveStubFrame();
+  __ jr(T0);
+  __ break_(0);
 }
 
 
 DECLARE_LEAF_RUNTIME_ENTRY(intptr_t,
                            BigintCompare,
                            RawBigint* left,
                            RawBigint* right);
 
 
 // Does identical check (object references are equal or not equal) with special
@@ skipping 86 matching lines @@
   __ Bind(&done);
   __ lw(T0, Address(SP, 0 * kWordSize));
   __ lw(T1, Address(SP, 1 * kWordSize));
   __ Ret();
   __ delay_slot()->addiu(SP, SP, Immediate(2 * kWordSize));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS