[all-commits] [llvm/llvm-project] aef03c: [clang][auto-init] Deprecate -enable-trivial-auto-...

[Kees Cook via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: aef03c9b3bed5cef5a1940774b80128aefcb4095
      https://github.com/llvm/llvm-project/commit/aef03c9b3bed5cef5a1940774b80128aefcb4095
  Author: Kees Cook <keescook at chromium.org>
  Date:   2022-10-01 (Sat, 01 Oct 2022)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticDriverKinds.td
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/Driver/cl-options.c
    M clang/test/Driver/clang_f_opts.c

  Log Message:
  -----------
  [clang][auto-init] Deprecate -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang

GCC 12 has been released and contains unconditional support for
-ftrivial-auto-var-init=zero:
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#index-ftrivial-auto-var-init

Maintain compatibility with GCC, and remove the -enable flag for "zero"
mode. The flag is left to generate an "unused" warning, though, to not
break all the existing users. The flag will be fully removed in Clang 17.

Link: https://github.com/llvm/llvm-project/issues/44842

Reviewed By: nickdesaulniers, MaskRay, srhines, xbolva00

Differential Revision: https://reviews.llvm.org/D125142