diff options
| author | Dale Johannesen <dalej@apple.com> | 2007-11-17 02:48:01 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2007-11-17 02:48:01 +0000 |
| commit | 7d9766246754a892d818301dbe46ea14976ac746 (patch) | |
| tree | 34b17e78d683050efff2fcf1ba3fa27a3b235a69 /llvm/lib | |
| parent | 06a10df562a405c3c3a4499cc999fb1900b54370 (diff) | |
| download | bcm5719-llvm-7d9766246754a892d818301dbe46ea14976ac746.tar.gz bcm5719-llvm-7d9766246754a892d818301dbe46ea14976ac746.zip | |
Remove indeterminism from a loop. We think this will
fix an occasional nonrepeatable bootstrap failure we've
been seeing on Darwin.
llvm-svn: 44202
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index bd1d66a44de..d1077995831 100644 --- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -1028,8 +1028,12 @@ unsigned LoopStrengthReduce::CheckForIVReuse(bool HasBaseReg, const std::vector<BasedUser>& UsersToProcess) { if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Stride)) { int64_t SInt = SC->getValue()->getSExtValue(); - for (std::map<SCEVHandle, IVsOfOneStride>::iterator SI= IVsByStride.begin(), - SE = IVsByStride.end(); SI != SE; ++SI) { + for (unsigned NewStride = 0, e = StrideOrder.size(); NewStride != e; + ++NewStride) { + std::map<SCEVHandle, IVsOfOneStride>::iterator SI = + IVsByStride.find(StrideOrder[NewStride]); + if (SI == IVsByStride.end()) + continue; int64_t SSInt = cast<SCEVConstant>(SI->first)->getValue()->getSExtValue(); if (SI->first != Stride && (unsigned(abs(SInt)) < SSInt || (SInt % SSInt) != 0)) |
