[Bug middle-end/102764] [12 Regression] -fcompare-debug failure (length) at -O3

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102764

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

https://gcc.gnu.org/g:972ee845f54839e9bd2e4611bb268d75440f3845

commit r12-4531-g972ee845f54839e9bd2e4611bb268d75440f3845
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Wed Oct 20 10:42:56 2021 +0200

    Fix PR middle-end/102764

    This is a regression present on the mainline in the form of -fcompare-debug
    failure at -O3 on a compiler-generated testcase.  Fixed by disregarding a
    debug statement in the last position of a basic block to reset the current
    location for the outgoing edges.

    gcc/
            PR middle-end/102764
            * cfgexpand.c (expand_gimple_basic_block): Disregard a final debug
            statement to reset the current location for the outgoing edges.

    gcc/testsuite/
            * gcc.dg/pr102764.c: New test.