commit 1464c1d60a33e19639b2bde5a6357af54daee6dd
author Benjamin Kramer <benny.kra@googlemail.com> Wed May 26 09:45:04 2010 +0000
committer Benjamin Kramer <benny.kra@googlemail.com> Wed May 26 09:45:04 2010 +0000
tree e0042731110a297e58ad4b31a245da30cff6c7f2
parent c2798a18a779b7aa71dda714349ff41eb6679d9f

Kill unneeded SExt.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104692 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/SimplifyLibCalls.cpp

diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 0f3ab7d..7414be7 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -564,7 +564,7 @@
                                  CI->getType(), "lhsv");
       Value *RHSV = B.CreateZExt(B.CreateLoad(CastToCStr(RHS, B), "rhsc"),
                                  CI->getType(), "rhsv");
-      return B.CreateSExt(B.CreateSub(LHSV, RHSV, "chardiff"), CI->getType());
+      return B.CreateSub(LHSV, RHSV, "chardiff");
     }
 
     // Constant folding: memcmp(x, y, l) -> cnst (all arguments are constant)