diff options
| author | Nadav Rotem <nrotem@apple.com> | 2013-01-09 01:15:42 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-01-09 01:15:42 +0000 |
| commit | 83be7b0dd3ae9a3cb22d36ae4c1775972553b94b (patch) | |
| tree | 5ca1c69275faaa284ac3abe27e3f56c31b0e0ae1 /lib/Transforms/Vectorize/LoopVectorize.cpp | |
| parent | d700a2f9c54e3312d28c132663bf60f81662b7f7 (diff) | |
Cost Model: Move the 'max unroll factor' variable to the TTI and add initial Cost Model support on ARM.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171928 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Vectorize/LoopVectorize.cpp')
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index 9c82cb8dca..c29f416be7 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -116,9 +116,6 @@ static const unsigned RuntimeMemoryCheckThreshold = 4; /// This is the highest vector width that we try to generate. static const unsigned MaxVectorSize = 8; -/// This is the highest Unroll Factor. -static const unsigned MaxUnrollSize = 4; - namespace { // Forward declarations. @@ -2715,6 +2712,8 @@ LoopVectorizationCostModel::selectUnrollFactor(bool OptForSize, UF = std::min(UF, (MaxLoopSizeThreshold / R.NumInstructions)); // Clamp the unroll factor ranges to reasonable factors. + unsigned MaxUnrollSize = TTI.getMaximumUnrollFactor(); + if (UF > MaxUnrollSize) UF = MaxUnrollSize; else if (UF < 1) |