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| author | Chris Lattner <sabre@nondot.org> | 2009-12-06 17:17:23 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-12-06 17:17:23 +0000 |
| commit | 6d6f10fe919eaf8391bae3df6ff8278158f11c4c (patch) | |
| tree | 771a9f56c485b599ee3f39e46a8c2952c4f1cd8a /llvm/lib | |
| parent | 7a141b3d887c185599169cb28ce284358c110c09 (diff) | |
| download | bcm5719-llvm-6d6f10fe919eaf8391bae3df6ff8278158f11c4c.tar.gz bcm5719-llvm-6d6f10fe919eaf8391bae3df6ff8278158f11c4c.zip | |
fix PR5698
llvm-svn: 90708
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/JumpThreading.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/JumpThreading.cpp b/llvm/lib/Transforms/Scalar/JumpThreading.cpp index 1b93f3441e4..d58b9c9de01 100644 --- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp +++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp @@ -718,6 +718,11 @@ bool JumpThreading::ProcessSwitchOnDuplicateCond(BasicBlock *PredBB, if (PredSI->getSuccessor(PredCase) != DestBB && DestSI->getSuccessor(i) != DestBB) continue; + + // Do not forward this if it already goes to this destination, this would + // be an infinite loop. + if (PredSI->getSuccessor(PredCase) == DestSucc) + continue; // Otherwise, we're safe to make the change. Make sure that the edge from // DestSI to DestSucc is not critical and has no PHI nodes. |
