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[DAG] SDPatternMatch::ReassociatableOpc_match - pull out repeated pattern count expression. NFC. #135187

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Merged
merged 2 commits into from
Apr 11, 2025
Merged

[DAG] SDPatternMatch::ReassociatableOpc_match - pull out repeated pattern count expression. NFC. #135187

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58d4f59
[DAG] SDPatternMatch::ReassociatableOpc_match - pull out repeated pat…
RKSimon Apr 10, 2025
469ecfe
Merge branch 'main' into dag-sdmatch-reassociate-size
RKSimon Apr 11, 2025
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11 changes: 6 additions & 5 deletions llvm/include/llvm/CodeGen/SDPatternMatch.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1145,16 +1145,17 @@ template <typename... PatternTs> struct ReassociatableOpc_match {

template <typename MatchContext>
bool match(const MatchContext &Ctx, SDValue N) {
constexpr size_t NumPatterns = std::tuple_size_v<std::tuple<PatternTs...>>;

SmallVector<SDValue> Leaves;
collectLeaves(N, Leaves);
if (Leaves.size() != std::tuple_size_v<std::tuple<PatternTs...>>)
if (Leaves.size() != NumPatterns)
return false;

// Matches[I][J] == true iff sd_context_match(Leaves[I], Ctx,
// std::get<J>(Patterns)) == true
std::array<SmallBitVector, std::tuple_size_v<std::tuple<PatternTs...>>>
Matches;
for (size_t I = 0, N = Leaves.size(); I < N; I++) {
std::array<SmallBitVector, NumPatterns> Matches;
for (size_t I = 0; I != NumPatterns; I++) {
SmallVector<bool> MatchResults;
std::apply(
[&](auto &...P) {
Expand All @@ -1163,7 +1164,7 @@ template <typename... PatternTs> struct ReassociatableOpc_match {
Patterns);
}

SmallBitVector Used(std::tuple_size_v<std::tuple<PatternTs...>>);
SmallBitVector Used(NumPatterns);
return reassociatableMatchHelper(Matches, Used);
}

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