diff options
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnroll.cpp | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/lib/Transforms/Scalar/LoopUnroll.cpp b/lib/Transforms/Scalar/LoopUnroll.cpp index 161874f..3f70c33 100644 --- a/lib/Transforms/Scalar/LoopUnroll.cpp +++ b/lib/Transforms/Scalar/LoopUnroll.cpp @@ -133,11 +133,9 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) { // completely unroll (subject to the threshold, checked below); otherwise // try to find greatest modulo of the trip count which is still under // threshold value. - if (TripCount != 0) { - Count = TripCount; - } else { + if (TripCount == 0) return false; - } + Count = TripCount; } // Enforce the threshold. @@ -148,24 +146,21 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) { if (TripCount != 1 && Size > UnrollThreshold) { DEBUG(errs() << " Too large to fully unroll with count: " << Count << " because size: " << Size << ">" << UnrollThreshold << "\n"); - if (UnrollAllowPartial) { - // Reduce unroll count to be modulo of TripCount for partial unrolling - Count = UnrollThreshold / LoopSize; - while (Count != 0 && TripCount%Count != 0) { - Count--; - } - if (Count < 2) { - DEBUG(errs() << " could not unroll partially\n"); - return false; - } else { - DEBUG(errs() << " partially unrolling with count: " - << Count << "\n"); - } - } else { + if (!UnrollAllowPartial) { DEBUG(errs() << " will not try to unroll partially because " << "-unroll-allow-partial not given\n"); return false; } + // Reduce unroll count to be modulo of TripCount for partial unrolling + Count = UnrollThreshold / LoopSize; + while (Count != 0 && TripCount%Count != 0) { + Count--; + } + if (Count < 2) { + DEBUG(errs() << " could not unroll partially\n"); + return false; + } + DEBUG(errs() << " partially unrolling with count: " << Count << "\n"); } } |