Improve instruction scheduling when calling the store buffer stub.

runtime/vm/assembler_arm.cc

Index: runtime/vm/assembler_arm.cc
diff --git a/runtime/vm/assembler_arm.cc b/runtime/vm/assembler_arm.cc
index cabee7f9574fe44545d16586af9da4c12f3587ae..5d5e4286b8f89ebd4e5d711b507a241c682228cc 100644
--- a/runtime/vm/assembler_arm.cc
+++ b/runtime/vm/assembler_arm.cc
@@ -1791,8 +1791,8 @@ void Assembler::StoreIntoObject(Register object,
   if (object != R0) {
     mov(R0, Operand(object));
   }
-  ldr(CODE_REG, Address(THR, Thread::update_store_buffer_code_offset()));
   ldr(LR, Address(THR, Thread::update_store_buffer_entry_point_offset()));
+  ldr(CODE_REG, Address(THR, Thread::update_store_buffer_code_offset()));
   blx(LR);
   PopList(regs);
   Bind(&done);