diff options
| author | Chris Lattner <sabre@nondot.org> | 2005-09-19 23:57:04 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-09-19 23:57:04 +0000 |
| commit | 9c88d9816246d260b37cdc689f313c56aec6941e (patch) | |
| tree | 82e47390c0d1eaa42b7748146db66ed0b9b30b90 | |
| parent | 7e1ff8d2d923ad62a2776aac35fb88a26a7e83d3 (diff) | |
| download | external_llvm-9c88d9816246d260b37cdc689f313c56aec6941e.zip external_llvm-9c88d9816246d260b37cdc689f313c56aec6941e.tar.gz external_llvm-9c88d9816246d260b37cdc689f313c56aec6941e.tar.bz2 | |
Reject a case we don't handle yet
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23393 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index 08403ae..c0cb2f4 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -897,7 +897,9 @@ HoistTerminator: static bool FoldCondBranchOnPHI(BranchInst *BI) { BasicBlock *BB = BI->getParent(); PHINode *PN = dyn_cast<PHINode>(BI->getCondition()); - if (!PN || PN->getParent() != BB) return false; + // NOTE: we currently cannot transform this case if the PHI node is used + // outside of the block. + if (!PN || PN->getParent() != BB || !PN->hasOneUse()) return false; // Degenerate case of a single entry PHI. if (PN->getNumIncomingValues() == 1) { |