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| author | Michael J. Spencer <bigcheesegs@gmail.com> | 2017-02-09 21:46:49 +0000 |
|---|---|---|
| committer | Michael J. Spencer <bigcheesegs@gmail.com> | 2017-02-09 21:46:49 +0000 |
| commit | 714d9d22ad7bd19679a042239b9e384d38303610 (patch) | |
| tree | de174277a5036118fbc2fd14edc7d0b8d6676bb4 /llvm/lib | |
| parent | 857aba44106ac543cbd8210cff56db46e7287c84 (diff) | |
| download | bcm5719-llvm-714d9d22ad7bd19679a042239b9e384d38303610.tar.gz bcm5719-llvm-714d9d22ad7bd19679a042239b9e384d38303610.zip | |
[LoadCombine] Fix combining of loads which span an aliasing store.
Fixes PR31517
Differential Revision: https://reviews.llvm.org/D28922
llvm-svn: 294632
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoadCombine.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoadCombine.cpp b/llvm/lib/Transforms/Scalar/LoadCombine.cpp index 389f1c595aa..61b7804b59b 100644 --- a/llvm/lib/Transforms/Scalar/LoadCombine.cpp +++ b/llvm/lib/Transforms/Scalar/LoadCombine.cpp @@ -245,13 +245,17 @@ bool LoadCombine::runOnBasicBlock(BasicBlock &BB) { bool Combined = false; unsigned Index = 0; for (auto &I : BB) { - if (I.mayThrow() || (I.mayWriteToMemory() && AST.containsUnknown(&I))) { + if (I.mayThrow() || AST.containsUnknown(&I)) { if (combineLoads(LoadMap)) Combined = true; LoadMap.clear(); AST.clear(); continue; } + if (I.mayWriteToMemory()) { + AST.add(&I); + continue; + } LoadInst *LI = dyn_cast<LoadInst>(&I); if (!LI) continue; |
