[Bug tree-optimization/108582] [12 Regression] ICE on valid code at -Os and above with "-fno-tree-ccp -fno-tree-dce": tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in useless_type_conversion_p, at gimple-expr.cc:87

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108582

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Andrew Pinski
<pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:6f23c9077feebb29c2a28ffe89b287286df27d6d

commit r12-9114-g6f23c9077feebb29c2a28ffe89b287286df27d6d
Author: Andrew Pinski <apinski@marvell.com>
Date:   Sat Jan 28 18:27:08 2023 +0000

    Fix PR 108582: ICE due to PHI-OPT removing a still in use ssa_name.

    This patch adds a check in match_simplify_replacement to make sure the
middlebb
    does not have any phi-nodes as we don't currently move those.
    This was just a thinko from before.

    Committed on the GCC 12 branch after a bootstrap/test on x86_64-linux-gnu.

            PR tree-optimization/108582

    gcc/ChangeLog:

            * tree-ssa-phiopt.cc (match_simplify_replacement): Add check
            for middlebb to have no phi nodes.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr108582-1.c: New test.

    (cherry picked from commit 876b3e0514bc8cb2256c44db56255403bedfa52d)