[all-commits] [llvm/llvm-project] ace8ce: [ARM][Driver] Ensure NEON is enabled and disabled ...

[Jack Styles via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ace8ceab736f7e265b206b583d218a7554bee864
      https://github.com/llvm/llvm-project/commit/ace8ceab736f7e265b206b583d218a7554bee864
  Author: Jack Styles <jack.styles at arm.com>
  Date:   2025-04-29 (Tue, 29 Apr 2025)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Driver/ToolChains/Arch/ARM.cpp
    M clang/test/Driver/arm-features.c
    M clang/test/Driver/arm-mfpu.c
    M clang/test/Preprocessor/arm-target-features.c

  Log Message:
  -----------
  [ARM][Driver] Ensure NEON is enabled and disabled correctly (#137595)

In #130623 support was added for `+nosimd` in the clang driver.
Following this PR, it was discovered that, if NEON is disabled in the
command line, it did not disable features that depend on this, such as
Crypto or AES. To achieve this, This PR does the following:
- Ensure that disabling NEON (e.g., via +nosimd) also disables dependent
features like Crypto and AES.
- Update the driver to automatically enable NEON when enabling features
that require it (e.g., AES).

This fixes inconsistent behavior where features relying on NEON could be
enabled without NEON itself being active, or where disabling NEON left
dependent features incorrectly enabled.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications