[Bug tree-optimization/114921] Optimization flags cause _Float16 to __bf16 casting to do nothing

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114921

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Richard Biener
<rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:fa7e05d90bb672b58424ddbe37a05a0fd0949b35

commit r14-10159-gfa7e05d90bb672b58424ddbe37a05a0fd0949b35
Author: Richard Biener <rguent...@suse.de>
Date:   Thu May 2 13:55:15 2024 +0200

    tree-optimization/114921 - _Float16 -> __bf16 isn't noop

    The vectorizer handles a _Float16 to __bf16 conversion through
    vectorizable_assignment, thinking it's a noop.  The following
    fixes this by requiring the same vector component mode when
    checking for CONVERT_EXPR_CODE_P, being stricter than for
    VIEW_CONVERT_EXPR.

            PR tree-optimization/114921
            * tree-vect-stmts.cc (vectorizable_assignment): Require
            same vector component modes for input and output for
            CONVERT_EXPR_CODE_P.

    (cherry picked from commit 87e35da16df74cd1c4729a55d94e7bc592487f48)