[all-commits] [llvm/llvm-project] d6bbe2: [libc] Fix definition of `UINT_MAX` in limits.h (#...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d6bbe2e20ff21cc2d31106742dfe1711ae5c641e
      https://github.com/llvm/llvm-project/commit/d6bbe2e20ff21cc2d31106742dfe1711ae5c641e
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2024-06-12 (Wed, 12 Jun 2024)

  Changed paths:
    M libc/include/llvm-libc-macros/limits-macros.h

  Log Message:
  -----------
  [libc] Fix definition of `UINT_MAX` in limits.h (#95279)

Summary:
Currently we use `(~0U)` for this definition, however the ~ operator
returns a different sign, meaning that preprocessor checks against this
value will fail. See https://godbolt.org/z/TrjaY1d8q where the
preprocessor thinks that it's not `0xffffffff` while the static
assertion thinks it is. This is because the latter does implicit
conversion but the preprocessor does not. This is now consistent with
other headers.



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