Fix code for store buffer update on ARM and MIPS (link register was trashed).

runtime/vm/intrinsifier_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"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 219 matching lines @@
   __ ldr(R0, Address(SP, 2 * kWordSize));  // Array.
 
   // Range check.
   __ ldr(R3, FieldAddress(R0, Array::length_offset()));  // Array length.
   __ cmp(R1, ShifterOperand(R3));
   // Runtime throws exception.
   __ b(&fall_through, CS);
 
   // Note that R1 is Smi, i.e, times 2.
   ASSERT(kSmiTagShift == 1);
-  // Destroy R2 as we will not continue in the function.
   __ ldr(R2, Address(SP, 0 * kWordSize));  // Value.
   __ add(R1, R0, ShifterOperand(R1, LSL, 1));  // R1 is Smi.
   __ StoreIntoObject(R0,
                      FieldAddress(R1, Array::data_offset()),
                      R2);
   // Caller is responsible for preserving the value if necessary.
   __ Ret();
   __ Bind(&fall_through);
   return false;
 }
@@ skipping 1439 matching lines @@
   __ Bind(&ok);
   __ Ret();
 
   __ Bind(&fall_through);
   return false;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM