Pass to replace tranfer/copy instructions into combine instruction where possible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154695 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Hexagon/HexagonTargetMachine.cpp b/lib/Target/Hexagon/HexagonTargetMachine.cpp
index 411325b..34036b2 100644
--- a/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ b/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -122,6 +122,7 @@
 
 
 bool HexagonPassConfig::addPreSched2() {
+  PM.add(createHexagonCopyToCombine());
   addPass(IfConverterID);
   return true;
 }