Quick compiler: fix array overrun.

MIRGraph::InlineCalls() was using the MIR opcode to recover
Dalvik instruction flags - something that is only valid for
Dalvik opcodes and not the set of extended MIR opcodes.

This is probably the 3rd or 4th time we've had a bug using
the MIR opcode in situations that are only valid for the Dalvik
opcode subset.  I took the opportunity to scan the code for
other cases of this (didn't find any), and did some cleanup while
I was in the neighborhood.

We should probably rework the DalvikOpcode/MirOpcode model whenver we
get around to removing DalvikInstruction from MIR.

Internal bug b/15352667: out-of-bound access in mir_optimization.cc

Change-Id: I75f06780468880892151e3cdd313e14bfbbaa489
diff --git a/compiler/dex/mir_analysis.cc b/compiler/dex/mir_analysis.cc
index 508f1c7..7129f8a 100644
--- a/compiler/dex/mir_analysis.cc
+++ b/compiler/dex/mir_analysis.cc
@@ -902,7 +902,7 @@
   while (!done) {
     tbb->visited = true;
     for (MIR* mir = tbb->first_mir_insn; mir != NULL; mir = mir->next) {
-      if (static_cast<uint32_t>(mir->dalvikInsn.opcode) >= kMirOpFirst) {
+      if (IsPseudoMirOp(mir->dalvikInsn.opcode)) {
         // Skip any MIR pseudo-op.
         continue;
       }