commit 0a230e0d985625a3909cb78fd867a3abaf434565
author Benjamin Kramer <benny.kra@googlemail.com> Thu Jul 11 16:05:50 2013 +0000
committer Benjamin Kramer <benny.kra@googlemail.com> Thu Jul 11 16:05:50 2013 +0000
tree 5781d89cdddab939dca31f5f5a62c2a1f825b22f
parent 1b3e3eef1fb51ace32b32e5ca217dacb03333b13

Don't use a potentially expensive shift if all we want is one set bit.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186095 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/SimplifyIndVar.cpp

diff --git a/lib/Transforms/Utils/SimplifyIndVar.cpp b/lib/Transforms/Utils/SimplifyIndVar.cpp
index 41c207c..bf3442a 100644
--- a/lib/Transforms/Utils/SimplifyIndVar.cpp
+++ b/lib/Transforms/Utils/SimplifyIndVar.cpp
@@ -119,7 +119,7 @@
         return 0;
 
       D = ConstantInt::get(UseInst->getContext(),
-                           APInt(BitWidth, 1).shl(D->getZExtValue()));
+                           APInt::getOneBitSet(BitWidth, D->getZExtValue()));
     }
     FoldedExpr = SE->getUDivExpr(SE->getSCEV(IVSrc), SE->getSCEV(D));
   }