[all-commits] [llvm/llvm-project] f42117: [DirectX] Replace bitfield version in ProgramHeade...

[Xiang Li via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f42117c8517cc928c6373bad35ebf75d94fe865b
      https://github.com/llvm/llvm-project/commit/f42117c8517cc928c6373bad35ebf75d94fe865b
  Author: Xiang Li <python3kgae at outlook.com>
  Date:   2024-05-11 (Sat, 11 May 2024)

  Changed paths:
    M llvm/include/llvm/BinaryFormat/DXContainer.h
    M llvm/lib/MC/MCDXContainerWriter.cpp
    M llvm/lib/ObjectYAML/DXContainerEmitter.cpp
    M llvm/tools/obj2yaml/dxcontainer2yaml.cpp
    M llvm/unittests/Object/DXContainerTest.cpp

  Log Message:
  -----------
  [DirectX] Replace bitfield version in ProgramHeader. (#91797)

Avoid using bitfield in dxbc::ProgramHeader.
It could potentially be read incorrectly on any host depending on the
compiler.

>From [C++17's
[class.bit]](https://timsong-cpp.github.io/cppwp/n4659/class.bit#1)
> Bit-fields are packed into some addressable allocation unit. [ Note:
Bit-fields straddle allocation units on some machines and not on others.
Bit-fields are assigned right-to-left on some machines, left-to-right on
others.  — end note ]

For #91793



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