Use cached underlyingMatchType when normalizing applied match aliases #20257
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dwijnand
reviewed
Apr 24, 2024
Delay their normalization until it is needed. Avoids overflows from infinite match types that did not need to normalize. Also improves MatchTypeTraces as a side effect. It appears to have been added to avoid some separate issue, which seems to have been fixed. It is no longer needed since the previous fix with constant folding in disjointnessBoundary.
Also fixes underlyingMatchType to not use the resType of HKTypeLambdas It should only be in `isMatch` used for `AliasingBounds`, not `isMatchAlias`
EugeneFlesselle
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test performance please |
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performance test scheduled: 1 job(s) in queue, 0 running. |
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Performance test finished successfully: Visit https://dotty-bench.epfl.ch/20257/ to see the changes. Benchmarks is based on merging with main (827df03) |
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Based on #20168