diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp b/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp index 73c14f5..a5f2765 100644 --- a/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp +++ b/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp @@ -82,7 +82,8 @@ void llvm::computePeelCount(Loop *L, unsigned LoopSize, // its only back edge. If there is such Phi, peeling 1 iteration from the // loop is profitable, because starting from 2nd iteration we will have an // invariant instead of this Phi. - if (LoopSize <= UP.Threshold) { + // First, check that we can peel at least one iteration. + if (2 * LoopSize <= UP.Threshold && UnrollPeelMaxCount > 0) { BasicBlock *BackEdge = L->getLoopLatch(); assert(BackEdge && "Loop is not in simplified form?"); BasicBlock *Header = L->getHeader(); |