diff options
Diffstat (limited to 'contrib/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp')
-rw-r--r-- | contrib/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/contrib/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index eff5268..6133962 100644 --- a/contrib/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/contrib/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -3390,6 +3390,10 @@ void LSRInstance::GenerateICmpZeroScales(LSRUse &LU, unsigned LUIdx, int64_t NewBaseOffset = (uint64_t)Base.BaseOffset * Factor; if (NewBaseOffset / Factor != Base.BaseOffset) continue; + // If the offset will be truncated at this use, check that it is in bounds. + if (!IntTy->isPointerTy() && + !ConstantInt::isValueValidForType(IntTy, NewBaseOffset)) + continue; // Check that multiplying with the use offset doesn't overflow. int64_t Offset = LU.MinOffset; @@ -3398,6 +3402,10 @@ void LSRInstance::GenerateICmpZeroScales(LSRUse &LU, unsigned LUIdx, Offset = (uint64_t)Offset * Factor; if (Offset / Factor != LU.MinOffset) continue; + // If the offset will be truncated at this use, check that it is in bounds. + if (!IntTy->isPointerTy() && + !ConstantInt::isValueValidForType(IntTy, Offset)) + continue; Formula F = Base; F.BaseOffset = NewBaseOffset; @@ -3432,6 +3440,10 @@ void LSRInstance::GenerateICmpZeroScales(LSRUse &LU, unsigned LUIdx, F.UnfoldedOffset = (uint64_t)F.UnfoldedOffset * Factor; if (F.UnfoldedOffset / Factor != Base.UnfoldedOffset) continue; + // If the offset will be truncated, check that it is in bounds. + if (!IntTy->isPointerTy() && + !ConstantInt::isValueValidForType(IntTy, F.UnfoldedOffset)) + continue; } // If we make it here and it's legal, add it. |