Subzero: Initial implementation of BB Local CSE

src/IceTargetLoweringX86BaseImpl.h

Index: src/IceTargetLoweringX86BaseImpl.h
diff --git a/src/IceTargetLoweringX86BaseImpl.h b/src/IceTargetLoweringX86BaseImpl.h
index 79b54774b674ccefd84ed667f22dd324f2674e1b..af05b7b8872180186500ab6d53d36526bc7d7389 100644
--- a/src/IceTargetLoweringX86BaseImpl.h
+++ b/src/IceTargetLoweringX86BaseImpl.h
@@ -443,6 +443,11 @@ template <typename TraitsType> void TargetX86Base<TraitsType>::translateO2() {
   Func->processAllocas(SortAndCombineAllocas);
   Func->dump("After Alloca processing");
 
+  if (getFlags().getEnableExperimental()) {
+    Func->localCSE();
+    Func->dump("After Local CSE");
+  }
+
   if (!getFlags().getEnablePhiEdgeSplit()) {
     // Lower Phi instructions.
     Func->placePhiLoads();