Move fused cmp branch ccode to MIR::meta.

This a small refactoring towards removing the large
DecodedInstruction from the MIR class.

Change-Id: I10f9ed5eaac42511d864c71d20a8ff6360292cec
diff --git a/compiler/dex/quick/arm/int_arm.cc b/compiler/dex/quick/arm/int_arm.cc
index 86ae75e..e0161e5 100644
--- a/compiler/dex/quick/arm/int_arm.cc
+++ b/compiler/dex/quick/arm/int_arm.cc
@@ -228,7 +228,7 @@
   RegLocation rl_src1 = mir_graph_->GetSrcWide(mir, 0);
   RegLocation rl_src2 = mir_graph_->GetSrcWide(mir, 2);
   // Normalize such that if either operand is constant, src2 will be constant.
-  ConditionCode ccode = static_cast<ConditionCode>(mir->dalvikInsn.arg[0]);
+  ConditionCode ccode = mir->meta.ccode;
   if (rl_src1.is_const) {
     std::swap(rl_src1, rl_src2);
     ccode = FlipComparisonOrder(ccode);