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| author | Adam Nemet <anemet@apple.com> | 2016-03-18 00:27:43 +0000 |
|---|---|---|
| committer | Adam Nemet <anemet@apple.com> | 2016-03-18 00:27:43 +0000 |
| commit | 709e3046ee3c473b373fe5ec61e4d6e467991898 (patch) | |
| tree | 48c80521787e640be1608d9991f919853facfb6f /llvm/lib/Analysis/TargetTransformInfo.cpp | |
| parent | 6d8beeca5302984e845d9c6d7bf0a9e4a5ca98f9 (diff) | |
| download | llvm-709e3046ee3c473b373fe5ec61e4d6e467991898.zip llvm-709e3046ee3c473b373fe5ec61e4d6e467991898.tar.gz llvm-709e3046ee3c473b373fe5ec61e4d6e467991898.tar.bz2 | |
[LoopDataPrefetch] Add TTI to limit the number of iterations to prefetch ahead
Summary:
It can hurt performance to prefetch ahead too much. Be conservative for
now and don't prefetch ahead more than 3 iterations on Cyclone.
Reviewers: hfinkel
Subscribers: llvm-commits, mzolotukhin
Differential Revision: http://reviews.llvm.org/D17949
llvm-svn: 263772
Diffstat (limited to 'llvm/lib/Analysis/TargetTransformInfo.cpp')
| -rw-r--r-- | llvm/lib/Analysis/TargetTransformInfo.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp index 8fd9fbf..b64d413 100644 --- a/llvm/lib/Analysis/TargetTransformInfo.cpp +++ b/llvm/lib/Analysis/TargetTransformInfo.cpp @@ -227,6 +227,10 @@ unsigned TargetTransformInfo::getMinPrefetchStride() const { return TTIImpl->getMinPrefetchStride(); } +unsigned TargetTransformInfo::getMaxPrefetchIterationsAhead() const { + return TTIImpl->getMaxPrefetchIterationsAhead(); +} + unsigned TargetTransformInfo::getMaxInterleaveFactor(unsigned VF) const { return TTIImpl->getMaxInterleaveFactor(VF); } |