Improve instruction scheduling when calling the store buffer stub.

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"  // NOLINT
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 1773 matching lines @@
   }
   // A store buffer update is required.
   RegList regs = (1 << CODE_REG) | (1 << LR);
   if (value != R0) {
     regs |= (1 << R0);  // Preserve R0.
   }
   PushList(regs);
   if (object != R0) {
     mov(R0, Operand(object));
   }
+  ldr(LR, Address(THR, Thread::update_store_buffer_entry_point_offset()));
   ldr(CODE_REG, Address(THR, Thread::update_store_buffer_code_offset()));
-  ldr(LR, Address(THR, Thread::update_store_buffer_entry_point_offset()));
   blx(LR);
   PopList(regs);
   Bind(&done);
 }
 
 
 void Assembler::StoreIntoObjectOffset(Register object,
                                       int32_t offset,
                                       Register value,
                                       bool can_value_be_smi) {
@@ skipping 1925 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