diff options
Diffstat (limited to 'llvm/lib/Analysis')
| -rw-r--r-- | llvm/lib/Analysis/DivergenceAnalysis.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/DivergenceAnalysis.cpp b/llvm/lib/Analysis/DivergenceAnalysis.cpp index b30539f3b31..d38725ff0ac 100644 --- a/llvm/lib/Analysis/DivergenceAnalysis.cpp +++ b/llvm/lib/Analysis/DivergenceAnalysis.cpp @@ -138,6 +138,11 @@ void DivergencePropagator::exploreSyncDependency(TerminatorInst *TI) { // a2 = 2; // a = phi(a1, a2); // sync dependent on (tid < 5) BasicBlock *ThisBB = TI->getParent(); + + // Unreachable blocks may not be in the dominator tree. + if (!DT.isReachableFromEntry(ThisBB)) + return; + BasicBlock *IPostDom = PDT.getNode(ThisBB)->getIDom()->getBlock(); if (IPostDom == nullptr) return; |
