commit 6877119ef3fa66f3dee4f468972361eadb537ef7
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 8bdffa6cdd893e9c8f9f77137c93a0c673830cf9
parent 730a977e02fcb296507278c6615a05c7991759bc

Kill unneeded SExt.

llvm-svn: 104692

llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp

diff --git a/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 0f3ab7d..7414be7 100644
--- a/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/llvm/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)