diff options
| author | Dorit Nuzman <dorit.nuzman@intel.com> | 2017-12-12 08:57:43 +0000 |
|---|---|---|
| committer | Dorit Nuzman <dorit.nuzman@intel.com> | 2017-12-12 08:57:43 +0000 |
| commit | 330c5d954fa7999f3c2adb32b0513406f143f9c9 (patch) | |
| tree | 3763b8bb15077505062f9dd86a1798f4e4c25263 /lib/Transforms/Vectorize/LoopVectorize.cpp | |
| parent | 315da3f2f72d3a657b8ce95431cb9009c7811b8d (diff) | |
[LV] Ignore the cost of values that will not appear in the vectorized loop
VecValuesToIgnore holds values that will not appear in the vectorized loop.
We should therefore ignore their cost when VF > 1.
Differential Revision: https://reviews.llvm.org/D40883
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320463 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Vectorize/LoopVectorize.cpp')
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index c5d62d0b97d..440641bd91c 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -6877,7 +6877,8 @@ LoopVectorizationCostModel::expectedCost(unsigned VF) { continue; // Skip ignored values. - if (ValuesToIgnore.count(&I)) + if (ValuesToIgnore.count(&I) || + (VF > 1 && VecValuesToIgnore.count(&I))) continue; VectorizationCostTy C = getInstructionCost(&I, VF); |