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| author | Dan Gohman <gohman@apple.com> | 2009-11-05 21:48:32 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-11-05 21:48:32 +0000 |
| commit | b1dc915a8d4971880a016e678ccf563d1a03a916 (patch) | |
| tree | 59c05bbf15f4b8ef1ac453103741ca63d7cc31ea /lib/Transforms/Utils/LoopSimplify.cpp | |
| parent | 32cc5f47fa6a544bb77afcdc92c37ba32bfc0c4f (diff) | |
| download | llvm-b1dc915a8d4971880a016e678ccf563d1a03a916.tar.gz llvm-b1dc915a8d4971880a016e678ccf563d1a03a916.tar.bz2 llvm-b1dc915a8d4971880a016e678ccf563d1a03a916.tar.xz | |
Avoid calling getUniqueExitBlocks from within LoopSimplify, as it depends
on loops having dedicated exits, which LoopSimplify can no longer always
guarantee.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86181 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/LoopSimplify.cpp')
| -rw-r--r-- | lib/Transforms/Utils/LoopSimplify.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/Transforms/Utils/LoopSimplify.cpp b/lib/Transforms/Utils/LoopSimplify.cpp index 63708b14b4..2ab0972149 100644 --- a/lib/Transforms/Utils/LoopSimplify.cpp +++ b/lib/Transforms/Utils/LoopSimplify.cpp @@ -241,7 +241,14 @@ ReprocessLoop: // loop-invariant instructions out of the way to open up more // opportunities, and the disadvantage of having the responsibility // to preserve dominator information. - if (ExitBlocks.size() > 1 && L->getUniqueExitBlock()) { + bool UniqueExit = true; + if (!ExitBlocks.empty()) + for (unsigned i = 1, e = ExitBlocks.size(); i != e; ++i) + if (ExitBlocks[i] != ExitBlocks[0]) { + UniqueExit = false; + break; + } + if (UniqueExit) { SmallVector<BasicBlock*, 8> ExitingBlocks; L->getExitingBlocks(ExitingBlocks); for (unsigned i = 0, e = ExitingBlocks.size(); i != e; ++i) { |