Supports FrameLookup vm test on MIPS

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 746 matching lines @@
 
   __ Bind(&call_target_function);
   // R0: Target function.
   __ ldr(R0, FieldAddress(R0, Function::code_offset()));
   __ ldr(R0, FieldAddress(R0, Code::instructions_offset()));
   __ AddImmediate(R0, Instructions::HeaderSize() - kHeapObjectTag);
   __ bx(R0);
 
   // Instance in R0, return its class-id in R0 as Smi.
   __ Bind(&get_class_id_as_smi);
-  Label not_smi;
+
   // Test if Smi -> load Smi class for comparison.
   __ tst(R0, ShifterOperand(kSmiTagMask));
   __ mov(R0, ShifterOperand(Smi::RawValue(kSmiCid)), EQ);
   __ bx(LR, EQ);
   __ LoadClassId(R0, R0);
   __ SmiTag(R0);
   __ bx(LR);
 }
 
 
@@ skipping 305 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