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Subject: [Bug middle-end/103314] [12 regression] ICE on valid code at -O1 and
 above on x86_64-linux-gnu: Segmentation fault since r12-5358
Date: Fri, 19 Nov 2021 12:07:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103314

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:ea2954df43d4162af23a20c84f4c5485463977ac

commit r12-5400-gea2954df43d4162af23a20c84f4c5485463977ac
Author: Andrew Pinski <apinski@marvell.com>
Date:   Fri Nov 19 01:42:41 2021 +0000

    Fix tree-optimization/103314 : Limit folding of (type) X op CST where t=
ype
is a nop convert to gimple

    There is some re-association code in fold_binary which conflicts with
    this optimization due keeping around some "constants" which are not
    INTEGER_CST (1 << -1) so we end up in an infinite loop because of that.
    So we need to limit this case to GIMPLE level only.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR tree-optimization/103314

    gcc/ChangeLog:

            * match.pd ((type) X op CST): Restrict the equal
            TYPE_PRECISION case to GIMPLE only.

    gcc/testsuite/ChangeLog:

            * gcc.c-torture/compile/pr103314-1.c: New test.=