[Bug ipa/101941] [12 Regression] Linux kernel build failure due to retaining fnsplit fragment with __attribute__((__error__))

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101941

--- Comment #30 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:76fe494230477a69f8fa8c8ca2d493acaf343eb1

commit r12-6666-g76fe494230477a69f8fa8c8ca2d493acaf343eb1
Author: Andrew Pinski <apinski@marvell.com>
Date:   Wed Nov 17 02:45:22 2021 +0000

    Fix tree-optimization/101941: IPA splitting out function with error
attribute

    The Linux kernel started to fail compile when the jump threader was
improved
    (r12-2591-g2e96b5f14e4025691). This failure was due to the IPA splitting
code
    decided now to split off the basic block which contained two functions,
    one of those functions included the error attribute on them.  This patch
fixes
    the problem by disallowing basic blocks from being split which contain
functions
    that have either the error or warning attribute on them.

    The two new testcases are to make sure we still split the function for
other
    places if we reject the one case.

    Committed as approved after Bootstrapped and tested on x86_64-linux-gnu
with no regressions.

            PR tree-optimization/101941

    gcc/ChangeLog:

            * ipa-split.cc (visit_bb): Disallow function calls where
            the function has either error or warning attribute.

    gcc/testsuite/ChangeLog:

            * gcc.c-torture/compile/pr101941-1.c: New test.
            * gcc.dg/tree-ssa/pr101941-1.c: New test.