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PrunedLiveness fix discoveredBlocks to be unique. #59983

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Merged
merged 1 commit into from
Jul 11, 2022
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PrunedLiveness fix discoveredBlocks to be unique. #59983

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13 changes: 10 additions & 3 deletions include/swift/SIL/PrunedLiveness.h
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Original file line number Diff line number Diff line change
Expand Up @@ -180,9 +180,16 @@ class PrunedLiveBlocks {
protected:
void markBlockLive(SILBasicBlock *bb, IsLive isLive) {
assert(isLive != Dead && "erasing live blocks isn't implemented.");
liveBlocks[bb] = (isLive == LiveOut);
if (discoveredBlocks)
discoveredBlocks->push_back(bb);
bool isLiveOut = (isLive == LiveOut);
auto iterAndInserted =
liveBlocks.insert(std::make_pair(bb, isLiveOut));
if (iterAndInserted.second) {
if (discoveredBlocks)
discoveredBlocks->push_back(bb);
} else if (isLiveOut) {
// Update the existing entry to be live-out.
iterAndInserted.first->getSecond() = true;
}
}

void computeUseBlockLiveness(SILBasicBlock *userBB);
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