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Subject: [Bug c++/104472] ICE: SIGSEGV in cxx_eval_internal_function with
 __builtin_convertvector and -frounding-math
Date: Wed, 11 May 2022 06:24:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104472

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:c7e7ca915dc4c526b1f58a4808c7ec4ceaa30348

commit r9-10125-gc7e7ca915dc4c526b1f58a4808c7ec4ceaa30348
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Feb 11 13:52:44 2022 +0100

    c++: Fix up constant expression __builtin_convertvector folding [PR1044=
72]

    The following testcase ICEs, because due to the -frounding-math
    fold_const_call fails, which is it returns NULL, and returning NULL from
    cxx_eval* is wrong, all the callers rely on them to either return folded
    value or original with *non_constant_p =3D true.

    The following patch does that, and additionally falls through into the
    default case where there is diagnostics for the !ctx->quiet case too.

    2022-02-11  Jakub Jelinek  <jakub@redhat.com>

            PR c++/104472
            * constexpr.c (cxx_eval_internal_function) <case IFN_VEC_CONVER=
T>:
            Only return fold_const_call result if it is non-NULL.  Otherwise
            fall through into the default: case to return t, set
*non_constant_p
            and emit diagnostics if needed.

            * g++.dg/cpp0x/constexpr-104472.C: New test.

    (cherry picked from commit 84993d94e13ad2ab3aee151bb5a5e767cf75d51e)=