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| 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 | 049cb4482ff89e90533fc78fc55fddb3f798d2c9 (patch) | |
| tree | c9d5df266a7e367d572f1fd7b93c5c7a3b950958 /llvm/lib/Transforms/Utils | |
| parent | a160924d57b21c7eddba08f695e0ebe5beb139d3 (diff) | |
| download | bcm5719-llvm-049cb4482ff89e90533fc78fc55fddb3f798d2c9.tar.gz bcm5719-llvm-049cb4482ff89e90533fc78fc55fddb3f798d2c9.zip | |
Reject a case we don't handle yet
llvm-svn: 23393
Diffstat (limited to 'llvm/lib/Transforms/Utils')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 08403aeca83..c0cb2f42b1e 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/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) { |
