[all-commits] [llvm/llvm-project] 5c8d12: [SelectionDAG] Add space-optimized forms of OPC_Ch...

[Wang Pengcheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5c8d1238382ce3ef6004d9cbe3fe67b8342d868c
      https://github.com/llvm/llvm-project/commit/5c8d1238382ce3ef6004d9cbe3fe67b8342d868c
  Author: Wang Pengcheng <wangpengcheng.pp at bytedance.com>
  Date:   2024-01-11 (Thu, 11 Jan 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAGISel.h
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
    M llvm/utils/TableGen/DAGISelMatcherEmitter.cpp

  Log Message:
  -----------
  [SelectionDAG] Add space-optimized forms of OPC_CheckPatternPredicate (#73319)


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.