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| author | Chris Lattner <sabre@nondot.org> | 2009-05-30 18:43:04 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-05-30 18:43:04 +0000 |
| commit | 464c05f504c6bf929f26a98f60b551905c12dcd1 (patch) | |
| tree | dbfcbeed288cbb5b81e63ec68b152df08b7f8d7e /lib | |
| parent | f122c7ec847bb904fca8e99343564fbd8564d5e6 (diff) | |
| download | external_llvm-464c05f504c6bf929f26a98f60b551905c12dcd1.zip external_llvm-464c05f504c6bf929f26a98f60b551905c12dcd1.tar.gz external_llvm-464c05f504c6bf929f26a98f60b551905c12dcd1.tar.bz2 | |
fix PR4284, a bug in simplifylibcalls handling memcmp. Patch by
Benjamin Kramer!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72625 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/SimplifyLibCalls.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp index 8c41c72..4b00640 100644 --- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -878,7 +878,7 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization { if (Len == 1) { // memcmp(S1,S2,1) -> *LHS - *RHS Value *LHSV = B.CreateLoad(CastToCStr(LHS, B), "lhsv"); Value *RHSV = B.CreateLoad(CastToCStr(RHS, B), "rhsv"); - return B.CreateZExt(B.CreateSub(LHSV, RHSV, "chardiff"), CI->getType()); + return B.CreateSExt(B.CreateSub(LHSV, RHSV, "chardiff"), CI->getType()); } // memcmp(S1,S2,2) != 0 -> (*(short*)LHS ^ *(short*)RHS) != 0 |