[Bug middle-end/107389] Always propagate __builtin_assume_aligned

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107389

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:7899582a059a9d8c25bfff305cd236d219dc4f20

commit r13-3810-g7899582a059a9d8c25bfff305cd236d219dc4f20
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Nov 8 13:49:16 2022 +0100

    tree-optimization/107389 - honor __builtin_assume_alignment at -O0

    The following makes sure to set alignment information on the LHS
    of __builtin_assume_alignment calls even when not optimizing so
    uses as arguments to builtin functions like memcpy or __atomic_load_n
    can be reflected at RTL expansion time.

            PR tree-optimization/107389
            * gimple-low.cc (lower_builtin_assume_aligned): New.
            (lower_stmt): Call it.

            * gcc.dg/pr107389.c: New testcase.