diff options
| author | Philip Reames <listmail@philipreames.com> | 2022-01-03 11:56:02 -0800 |
|---|---|---|
| committer | Philip Reames <listmail@philipreames.com> | 2022-01-03 11:57:35 -0800 |
| commit | 7203140748cec7185479cc413ea68f34d2eced99 (patch) | |
| tree | 7ffe9b271df0049afb6207a798170154dbb10e14 /llvm/lib/Transforms/Utils/LoopUnroll.cpp | |
| parent | cbcbbd6ac8ece43eaff65d40401c75144bf2631f (diff) | |
| download | llvm-7203140748cec7185479cc413ea68f34d2eced99.zip llvm-7203140748cec7185479cc413ea68f34d2eced99.tar.gz llvm-7203140748cec7185479cc413ea68f34d2eced99.tar.bz2 | |
Revert "[unroll] Prune all but first copy of invariant exit"
This reverts commit 9bd22595bad36cd19f5e7ae18ccd9f41cba29dc5.
Seeing some bot failures which look plausibly connected. Revert while investigating/waiting for bots to stablize.
e.g. https://lab.llvm.org/buildbot#builders/36/builds/15933
Diffstat (limited to 'llvm/lib/Transforms/Utils/LoopUnroll.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LoopUnroll.cpp | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/llvm/lib/Transforms/Utils/LoopUnroll.cpp b/llvm/lib/Transforms/Utils/LoopUnroll.cpp index 0a530f5..b0c622b 100644 --- a/llvm/lib/Transforms/Utils/LoopUnroll.cpp +++ b/llvm/lib/Transforms/Utils/LoopUnroll.cpp @@ -310,7 +310,6 @@ LoopUnrollResult llvm::UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI, unsigned TripMultiple; unsigned BreakoutTrip; bool ExitOnTrue; - bool InvariantExit; SmallVector<BasicBlock *> ExitingBlocks; }; DenseMap<BasicBlock *, ExitInfo> ExitInfos; @@ -334,8 +333,6 @@ LoopUnrollResult llvm::UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI, (unsigned)GreatestCommonDivisor64(ULO.Count, Info.TripMultiple); } Info.ExitOnTrue = !L->contains(BI->getSuccessor(0)); - Info.InvariantExit = L->isLoopInvariant(BI->getCondition()) && - DT->dominates(ExitingBlock, LatchBlock); Info.ExitingBlocks.push_back(ExitingBlock); LLVM_DEBUG(dbgs() << " Exiting block %" << ExitingBlock->getName() << ": TripCount=" << Info.TripCount @@ -688,8 +685,6 @@ LoopUnrollResult llvm::UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI, auto WillExit = [&](const ExitInfo &Info, unsigned i, unsigned j, bool IsLatch) -> Optional<bool> { - if (Info.InvariantExit && i != 0) - return false; if (CompletelyUnroll) { if (PreserveOnlyFirst) { if (i == 0) |