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| author | Dan Gohman <gohman@apple.com> | 2009-02-12 18:08:24 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-02-12 18:08:24 +0000 |
| commit | c83324682f3409c15dad992cd62928426c9ad83d (patch) | |
| tree | 0c31573c0c1c9425a476c7eedef8401d7fa2a15f /lib/Transforms/Scalar/LoopIndexSplit.cpp | |
| parent | 8c4d1b2bcfa63d064a7bcbd9cd23ebe3b282f853 (diff) | |
| download | llvm-c83324682f3409c15dad992cd62928426c9ad83d.tar.gz llvm-c83324682f3409c15dad992cd62928426c9ad83d.tar.bz2 llvm-c83324682f3409c15dad992cd62928426c9ad83d.tar.xz | |
Add a utility function to LoopInfo to return the exit block
when the loop has exactly one exit, and make use of it in
LoopIndexSplit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64388 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/LoopIndexSplit.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopIndexSplit.cpp | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/lib/Transforms/Scalar/LoopIndexSplit.cpp b/lib/Transforms/Scalar/LoopIndexSplit.cpp index f625c13d45..2bcb10849e 100644 --- a/lib/Transforms/Scalar/LoopIndexSplit.cpp +++ b/lib/Transforms/Scalar/LoopIndexSplit.cpp @@ -236,15 +236,14 @@ bool LoopIndexSplit::runOnLoop(Loop *IncomingLoop, LPPassManager &LPM_Ref) { } // Reject loop if loop exit condition is not suitable. - SmallVector<BasicBlock *, 2> EBs; - L->getExitingBlocks(EBs); - if (EBs.size() != 1) + BasicBlock *ExitingBlock = L->getExitingBlock(); + if (!ExitingBlock) return false; - BranchInst *EBR = dyn_cast<BranchInst>(EBs[0]->getTerminator()); + BranchInst *EBR = dyn_cast<BranchInst>(ExitingBlock->getTerminator()); if (!EBR) return false; ExitCondition = dyn_cast<ICmpInst>(EBR->getCondition()); if (!ExitCondition) return false; - if (EBs[0] != L->getLoopLatch()) return false; + if (ExitingBlock != L->getLoopLatch()) return false; IVExitValue = ExitCondition->getOperand(1); if (!L->isLoopInvariant(IVExitValue)) IVExitValue = ExitCondition->getOperand(0); |