================
@@ -2439,6 +2597,68 @@ bool WaitcntBrackets::mergeScore(const MergeInfo &M,
unsigned &Score,
return OtherShifted > MyShifted;
}
+bool WaitcntBrackets::mergeAsyncMarkers(
+ const MergeInfo MergeInfos[NUM_INST_CNTS],
+ const SmallVectorImpl<std::array<unsigned, NUM_INST_CNTS>> &OtherMarkers) {
+ bool StrictDom = false;
+
+ LLVM_DEBUG(dbgs() << "Merging async markers ...");
+ // Early exit: both empty
+ if (AsyncMarkers.empty() && OtherMarkers.empty()) {
+ LLVM_DEBUG(dbgs() << " nothing to merge\n");
+ return false;
+ }
+ LLVM_DEBUG(dbgs() << '\n');
+
+ // Determine maximum length needed after merging
+ size_t MaxSize = std::max(AsyncMarkers.size(), OtherMarkers.size());
+
+ // Pad with zero-filled markers if our list is shorter.
+ // Zero represents "no pending async operations at this checkpoint"
+ // and acts as the identity element for max() during merging
+ std::array<unsigned, NUM_INST_CNTS> ZeroMarker{};
+ AsyncMarkers.resize(MaxSize, ZeroMarker);
----------------
nhaehnle wrote:
Shouldn't the zeroes be inserted at the beginning of the vector?
https://github.com/llvm/llvm-project/pull/173259
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