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| author | Chris Lattner <sabre@nondot.org> | 2007-04-02 22:51:58 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-04-02 22:51:58 +0000 |
| commit | 1d31290634eccc3b360c427282d59780d76b9169 (patch) | |
| tree | de1e9c54a62b8870c61fb93479b95bffcd68f6b3 /lib/Transforms/Scalar/LoopStrengthReduce.cpp | |
| parent | 19e970542d63ae7865b7abefd503575af8034299 (diff) | |
allow -1 strides to reuse "1" strides.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35607 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index 744e0548ba..db8ab485e3 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 |