Support UseDartApi vm test on ARM.

runtime/vm/stub_code_arm.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_ARM)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/dart_entry.h"
@@ skipping 919 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.
+// R6: function to be reoptimized.
+// R4: argument descriptor (preserved).
 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
-  __ Unimplemented("OptimizeFunction stub");
+  __ EnterStubFrame();
+  __ Push(R4);
+  __ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
+  __ Push(IP);  // Setup space on stack for return value.
+  __ Push(R6);
+  __ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry);
+  __ Pop(R0);  // Discard argument.
+  __ Pop(R0);  // Get Code object
+  __ Pop(R4);  // Restore argument descriptor.
+  __ ldr(R0, FieldAddress(R0, Code::instructions_offset()));
+  __ AddImmediate(R0, Instructions::HeaderSize() - kHeapObjectTag);
+  __ LeaveStubFrame();
+  __ bx(R0);
+  __ bkpt(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 71 matching lines @@
   __ Bind(&reference_compare);
   __ cmp(left, ShifterOperand(right));
   __ Bind(&done);
   __ PopList((1 << R0) | (1 << R1) | (1 << R2));
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM