[all-commits] [llvm/llvm-project] ffc9a3: [TableGen] Use bitwise operations to access HwMode...

[superZWT123 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ffc9a30938ae5c42c03f9c563db1465876b4def6
      https://github.com/llvm/llvm-project/commit/ffc9a30938ae5c42c03f9c563db1465876b4def6
  Author: superZWT123 <zhengwentao3 at huawei.com>
  Date:   2024-05-04 (Sat, 04 May 2024)

  Changed paths:
    M llvm/include/llvm/MC/MCSubtargetInfo.h
    A llvm/test/TableGen/HwModeBitSet.td
    A llvm/test/TableGen/HwModeEncodeAPInt.td
    M llvm/test/TableGen/HwModeEncodeDecode3.td
    M llvm/utils/TableGen/CodeEmitterGen.cpp
    M llvm/utils/TableGen/Common/CodeGenHwModes.cpp
    M llvm/utils/TableGen/SubtargetEmitter.cpp

  Log Message:
  -----------
  [TableGen] Use bitwise operations to access HwMode ID.  (#88377)

1. Bitwise operations are used to access HwMode, allowing for the
coexistence of HwMode IDs for different features (such as RegInfo and
EncodingInfo). This will provide better scalability for HwMode.
Currently, most users utilize HwMode primarily for configuring
Register-related information, and few use it for configuring Encoding.
The limited scalability of HwMode has been a significant factor in this
usage pattern.
2. Sink the HwMode Encodings selection logic down to per instruction
level, this makes the logic for choosing encodings clearer and provides
better error messages.
3. Add some HwMode ID conflict detection to the getHwMode() interface.



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