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[SelectionDAG] Add space-optimized forms of OPC_CheckPatternPredicate #73319

Merged
merged 1 commit into from Jan 11, 2024
Merged

[SelectionDAG] Add space-optimized forms of OPC_CheckPatternPredicate #73319

merged 1 commit into from Jan 11, 2024

Commits on Jan 11, 2024

  1. [SelectionDAG] Add space-optimized forms of OPC_CheckPatternPredicate 

    We record the usage of each `PatternPredicate` and sort them by
usage.

For the top 8 `PatternPredicate`s, we will emit a
`OPC_CheckPatternPredicateN` to save one byte.

The old `OPC_CheckPatternPredicate2` is renamed to
`OPC_CheckPatternPredicateTwoByte`.

Overall this reduces the llc binary size with all in-tree targets by
about 93K.
    @wangpc-pp
    wangpc-pp committed Jan 11, 2024
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