From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Wed, 26 May 2010 09:45:04 +0000 (+0000)
Subject: Kill unneeded SExt.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=1464c1d60a33e19639b2bde5a6357af54daee6dd;p=oota-llvm.git

Kill unneeded SExt.


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

diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 0f3ab7d8b53..7414be74e0a 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -564,7 +564,7 @@ struct MemCmpOpt : public LibCallOptimization {
                                  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)