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| author | Ayal Zaks <ayal.zaks@intel.com> | 2020-06-07 11:36:57 +0300 |
|---|---|---|
| committer | Ayal Zaks <ayal.zaks@intel.com> | 2020-07-07 15:04:21 +0300 |
| commit | 7bf299c8d8d59304fb821f8811618cdeb1d1f1fd (patch) | |
| tree | 2873472f5c0a581db47fab61f91331bca4953b97 /llvm/lib/Analysis/LoopAccessAnalysis.cpp | |
| parent | de0175d04bc3679c7bd8dc64520e790bf38f30b0 (diff) | |
| download | llvm-7bf299c8d8d59304fb821f8811618cdeb1d1f1fd.zip llvm-7bf299c8d8d59304fb821f8811618cdeb1d1f1fd.tar.gz llvm-7bf299c8d8d59304fb821f8811618cdeb1d1f1fd.tar.bz2 | |
[LV] Vectorize without versioning-for-unit-stride under -Os/-Oz
If a loop is in a function marked OptSize, Loop Access Analysis should refrain
from generating runtime checks for unit strides that will version the loop.
If a loop is in a function marked OptSize and its vectorization is enabled, it
should be vectorized w/o any versioning.
Fixes PR46228.
Differential Revision: https://reviews.llvm.org/D81345
Diffstat (limited to 'llvm/lib/Analysis/LoopAccessAnalysis.cpp')
| -rw-r--r-- | llvm/lib/Analysis/LoopAccessAnalysis.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/Analysis/LoopAccessAnalysis.cpp b/llvm/lib/Analysis/LoopAccessAnalysis.cpp index 3c75f0f..ae282a7 100644 --- a/llvm/lib/Analysis/LoopAccessAnalysis.cpp +++ b/llvm/lib/Analysis/LoopAccessAnalysis.cpp @@ -1835,6 +1835,10 @@ void LoopAccessInfo::analyzeLoop(AAResults *AA, LoopInfo *LI, const bool IsAnnotatedParallel = TheLoop->isAnnotatedParallel(); + const bool EnableMemAccessVersioningOfLoop = + EnableMemAccessVersioning && + !TheLoop->getHeader()->getParent()->hasOptSize(); + // For each block. for (BasicBlock *BB : TheLoop->blocks()) { // Scan the BB and collect legal loads and stores. Also detect any @@ -1890,7 +1894,7 @@ void LoopAccessInfo::analyzeLoop(AAResults *AA, LoopInfo *LI, NumLoads++; Loads.push_back(Ld); DepChecker->addAccess(Ld); - if (EnableMemAccessVersioning) + if (EnableMemAccessVersioningOfLoop) collectStridedAccess(Ld); continue; } @@ -1914,7 +1918,7 @@ void LoopAccessInfo::analyzeLoop(AAResults *AA, LoopInfo *LI, NumStores++; Stores.push_back(St); DepChecker->addAccess(St); - if (EnableMemAccessVersioning) + if (EnableMemAccessVersioningOfLoop) collectStridedAccess(St); } } // Next instr. |