diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index 482d3a6b39f..d3d85b1b399 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -4168,7 +4168,9 @@ static bool BrPHIToSelect(DominatorTree &DT, BranchInst *BI, PHINode *Merge, } const SCEV *ScalarEvolution::createNodeFromSelectLikePHI(PHINode *PN) { - if (PN->getNumIncomingValues() == 2) { + auto IsReachable = + [&](BasicBlock *BB) { return DT.isReachableFromEntry(BB); }; + if (PN->getNumIncomingValues() == 2 && all_of(PN->blocks(), IsReachable)) { const Loop *L = LI.getLoopFor(PN->getParent()); // We don't want to break LCSSA, even in a SCEV expression tree. |
