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

runtime/vm/assembler_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/simulator.h"
 #include "vm/runtime_entry.h"
@@ skipping 1357 matching lines @@
                                 bool can_value_be_smi) {
   ASSERT(object != value);
   str(value, dest);
   Label done;
   if (can_value_be_smi) {
     StoreIntoObjectFilter(object, value, &done);
   } else {
     StoreIntoObjectFilterNoSmi(object, value, &done);
   }
   // A store buffer update is required.
-  if (value != R0) Push(R0);  // Preserve R0.
+  RegList regs = (1 << LR);
+  if (value != R0) {
+    regs |= (1 << R0);  // Preserve R0.
+  }
+  PushList(regs);
   if (object != R0) {
     mov(R0, ShifterOperand(object));
   }
   BranchLink(&StubCode::UpdateStoreBufferLabel());
-  if (value != R0) Pop(R0);  // Restore R0.
+  PopList(regs);
   Bind(&done);
 }
 
 
 void Assembler::StoreIntoObjectNoBarrier(Register object,
                                          const Address& dest,
                                          Register value) {
   str(value, dest);
 #if defined(DEBUG)
   Label done;
@@ skipping 811 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfFpuRegisters));
   return fpu_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM