diff options
| -rw-r--r-- | llvm/lib/Analysis/DemandedBits.cpp | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/llvm/lib/Analysis/DemandedBits.cpp b/llvm/lib/Analysis/DemandedBits.cpp index 0df47a9eda6..48412d204dc 100644 --- a/llvm/lib/Analysis/DemandedBits.cpp +++ b/llvm/lib/Analysis/DemandedBits.cpp @@ -402,14 +402,9 @@ void DemandedBits::performAnalysis() { // If we've added to the set of alive bits (or the operand has not // been previously visited), then re-queue the operand to be visited // again. - APInt ABPrev(BitWidth, 0); - auto ABI = AliveBits.find(I); - if (ABI != AliveBits.end()) - ABPrev = ABI->second; - - APInt ABNew = AB | ABPrev; - if (ABNew != ABPrev || ABI == AliveBits.end()) { - AliveBits[I] = std::move(ABNew); + auto Res = AliveBits.try_emplace(I); + if (Res.second || (AB |= Res.first->second) != Res.first->second) { + Res.first->second = std::move(AB); Worklist.insert(I); } } |
