[Bug target/112989] [14 Regression] GC ICE with C++, `#include <arm_sve.h>` and `-fsanitize=address`

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112989

--- Comment #16 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Richard Sandiford <rsandifo@gcc.gnu.org>:

https://gcc.gnu.org/g:659a5a908edd84894c2aa7f6f89468217d6894ca

commit r14-8354-g659a5a908edd84894c2aa7f6f89468217d6894ca
Author: Richard Sandiford <richard.sandiford@arm.com>
Date:   Tue Jan 23 11:10:41 2024 +0000

    aarch64: Avoid registering duplicate C++ overloads [PR112989]

    In the original fix for this PR, I'd made sure that
    including <arm_sme.h> didn't reach the final return in
    simulate_builtin_function_decl (which would indicate duplicate
    function definitions).  But it seems I forgot to do the same
    thing for C++, which defines all of its overloads directly.

    This patch fixes a case where we still recorded duplicate
    functions for C++.  Thanks to Iain for reporting the resulting
    GC ICE and for help with reproducing it.

    gcc/
            PR target/112989
            * config/aarch64/aarch64-sve-builtins-shapes.cc (build_one): Skip
            MODE_single variants of functions that don't take tuple arguments.