diff options
Diffstat (limited to 'llvm/lib/Analysis/BranchProbabilityInfo.cpp')
| -rw-r--r-- | llvm/lib/Analysis/BranchProbabilityInfo.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/BranchProbabilityInfo.cpp b/llvm/lib/Analysis/BranchProbabilityInfo.cpp index 6cdf43a06a9..a0d6123b583 100644 --- a/llvm/lib/Analysis/BranchProbabilityInfo.cpp +++ b/llvm/lib/Analysis/BranchProbabilityInfo.cpp @@ -147,6 +147,16 @@ bool BranchProbabilityInfo::calcUnreachableHeuristics(BasicBlock *BB) { if (TI->getNumSuccessors() == 1 || UnreachableEdges.empty()) return false; + // If the terminator is an InvokeInst, check only the normal destination block + // as the unwind edge of InvokeInst is also very unlikely taken. + if (auto *II = dyn_cast<InvokeInst>(TI)) + if (PostDominatedByUnreachable.count(II->getNormalDest())) { + PostDominatedByUnreachable.insert(BB); + // Return false here so that edge weights for InvokeInst could be decided + // in calcInvokeHeuristics(). + return false; + } + uint32_t UnreachableWeight = std::max(UR_TAKEN_WEIGHT / (unsigned)UnreachableEdges.size(), MIN_WEIGHT); for (SmallVectorImpl<unsigned>::iterator I = UnreachableEdges.begin(), |
