[Bug middle-end/122715] Missed optimization of IFN_AVG_FLOOR (x, x) --> x

"cvs-commit at gcc dot gnu.org via Gcc-bugs" <[email protected]> Thu, 23 Jul 2026 14:47:15 +0000

Newsgroups	gmane.comp.gcc.bugs
Message-ID	<[email protected]/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122715

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jeff Law <[email protected]>:

https://gcc.gnu.org/g:3b126071b10e5b12e7694f7a237f746e8db6d82c

commit r17-2670-g3b126071b10e5b12e7694f7a237f746e8db6d82c
Author: Odysseas Georgoudis <[email protected]>
Date:   Thu Jul 23 08:46:24 2026 -0600

    middle-end: Fold averages with equal operands [PR122715]

    IFN_AVG_FLOOR (x, x) and IFN_AVG_CEIL (x, x) both
    produce x.  Fold these cases in match.pd.

            PR middle-end/122715

    gcc/ChangeLog:

            * match.pd: Fold IFN_AVG_FLOOR and IFN_AVG_CEIL with equal
            operands.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr122715.c: New test.