diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp b/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp index 5f465f328b0..cfbecd59af3 100644 --- a/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp +++ b/llvm/lib/Transforms/Utils/LoopUnrollPeel.cpp @@ -221,6 +221,9 @@ void llvm::computePeelCount(Loop *L, unsigned LoopSize, TargetTransformInfo::UnrollingPreferences &UP, unsigned &TripCount, ScalarEvolution &SE) { assert(LoopSize > 0 && "Zero loop size is not allowed!"); + // Save the UP.PeelCount value set by the target in + // TTI.getUnrollingPreferences or by the flag -unroll-peel-count. + unsigned TargetPeelCount = UP.PeelCount; UP.PeelCount = 0; if (!canPeel(L)) return; @@ -240,7 +243,9 @@ void llvm::computePeelCount(Loop *L, unsigned LoopSize, SmallDenseMap<PHINode *, unsigned> IterationsToInvariance; // Now go through all Phis to calculate their the number of iterations they // need to become invariants. - unsigned DesiredPeelCount = 0; + // Start the max computation with the UP.PeelCount value set by the target + // in TTI.getUnrollingPreferences or by the flag -unroll-peel-count. + unsigned DesiredPeelCount = TargetPeelCount; BasicBlock *BackEdge = L->getLoopLatch(); assert(BackEdge && "Loop is not in simplified form?"); for (auto BI = L->getHeader()->begin(); isa<PHINode>(&*BI); ++BI) { |
