diff options
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnrollPass.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopUnrollPass.cpp b/lib/Transforms/Scalar/LoopUnrollPass.cpp index f20f7dc..f0a661c 100644 --- a/lib/Transforms/Scalar/LoopUnrollPass.cpp +++ b/lib/Transforms/Scalar/LoopUnrollPass.cpp @@ -132,8 +132,10 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) { unsigned LoopSize = ApproximateLoopSize(L, NumCalls); DEBUG(dbgs() << " Loop Size = " << LoopSize << "\n"); if (NumCalls != 0) { - DEBUG(dbgs() << " Not unrolling loop with function calls.\n"); - return false; + // Even for a loop that contains calls, it can still be profitable to + // unroll if the loop is really, REALLY small. + DEBUG(dbgs() <<" Using lower threshold for loop with function calls.\n"); + CurrentThreshold = OptSizeUnrollThreshold; } uint64_t Size = (uint64_t)LoopSize*Count; if (TripCount != 1 && Size > CurrentThreshold) { |