diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopUnrollPass.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnrollPass.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/Transforms/Scalar/LoopUnrollPass.cpp b/lib/Transforms/Scalar/LoopUnrollPass.cpp index ecd350b258..fc28fd2bdc 100644 --- a/lib/Transforms/Scalar/LoopUnrollPass.cpp +++ b/lib/Transforms/Scalar/LoopUnrollPass.cpp @@ -12,7 +12,6 @@ // counts of loops easily. //===----------------------------------------------------------------------===// -#define DEBUG_TYPE "loop-unroll" #include "llvm/Transforms/Scalar.h" #include "llvm/Analysis/CodeMetrics.h" #include "llvm/Analysis/LoopPass.h" @@ -29,6 +28,8 @@ using namespace llvm; +#define DEBUG_TYPE "loop-unroll" + static cl::opt<unsigned> UnrollThreshold("unroll-threshold", cl::init(150), cl::Hidden, cl::desc("The cut-off point for automatic loop unrolling")); @@ -237,9 +238,12 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) { return false; } uint64_t Size = (uint64_t)LoopSize*Count; - if (TripCount != 1 && Size > Threshold) { - DEBUG(dbgs() << " Too large to fully unroll with count: " << Count - << " because size: " << Size << ">" << Threshold << "\n"); + if (TripCount != 1 && + (Size > Threshold || (Count != TripCount && Size > PartialThreshold))) { + if (Size > Threshold) + DEBUG(dbgs() << " Too large to fully unroll with count: " << Count + << " because size: " << Size << ">" << Threshold << "\n"); + bool AllowPartial = UserAllowPartial ? CurrentAllowPartial : UP.Partial; if (!AllowPartial && !(Runtime && TripCount == 0)) { DEBUG(dbgs() << " will not try to unroll partially because " |