Run code placement optimization for targets that want it (arm and x86 for now).

llvm-svn: 71726
diff --git a/llvm/lib/CodeGen/CodePlacementOpt.cpp b/llvm/lib/CodeGen/CodePlacementOpt.cpp
index 61a8b12..919ee54 100644
--- a/llvm/lib/CodeGen/CodePlacementOpt.cpp
+++ b/llvm/lib/CodeGen/CodePlacementOpt.cpp
@@ -104,6 +104,9 @@
 ///       jcc <cond> C, [exit]
 ///
 bool CodePlacementOpt::OptimizeIntraLoopEdges() {
+  if (!TLI->shouldOptimizeCodePlacement())
+    return false;
+
   bool Changed = false;
   for (unsigned i = 0, e = UncondJmpMBBs.size(); i != e; ++i) {
     MachineBasicBlock *MBB = UncondJmpMBBs[i].first;