X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTransforms%2FScalar%2FLoopStrengthReduce.cpp;h=db8ab485e394c428ae1b60e83ab27864e3f17893;hb=1d31290634eccc3b360c427282d59780d76b9169;hp=744e0548bad0480870bdf9b6890d7684bd957532;hpb=1ebd89eb6b4f5df8d8171ee654a73ecdf3f66580;p=oota-llvm.git

diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 744e0548bad..db8ab485e39 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -929,7 +929,8 @@ unsigned LoopStrengthReduce::CheckForIVReuse(const SCEVHandle &Stride,
     for (std::map<SCEVHandle, IVsOfOneStride>::iterator SI= IVsByStride.begin(),
            SE = IVsByStride.end(); SI != SE; ++SI) {
       int64_t SSInt = cast<SCEVConstant>(SI->first)->getValue()->getSExtValue();
-      if (unsigned(abs(SInt)) < SSInt || (SInt % SSInt) != 0)
+      if (SInt != -SSInt &&
+          (unsigned(abs(SInt)) < SSInt || (SInt % SSInt) != 0))
         continue;
       int64_t Scale = SInt / SSInt;
       // Check that this stride is valid for all the types used for loads and