[Bug middle-end/100786] [9/10/11/12 Regression] ICE: in fold_convert_loc with alias attribute and different types and different sizes

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100786

--- Comment #4 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:5c12507f5d0bc080e4f346af99824e039236e61c

commit r12-6776-g5c12507f5d0bc080e4f346af99824e039236e61c
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Jan 20 14:25:51 2022 +0100

    middle-end/100786 - constant folding from incompatible alias

    The following avoids us ICEing doing constant folding from variables
    with aliases of different types.  The issue appears both in
    folding and CCP and FRE can do more fancy stuff to still constant
    fold cases where the load is smaller than the initializer so
    defer it to there.

    2022-01-20  Richard Biener  <rguenther@suse.de>

            PR middle-end/100786
            * gimple-fold.cc (get_symbol_constant_value): Only return
            values of compatible type to the symbol.

            * gcc.dg/torture/pr100786.c: New testcase.