[Bug target/111225] ICE in curr_insn_transform, unable to generate reloads for xor, since r14-2447-g13c556d6ae84be

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111225

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Vladimir Makarov <vmakarov@gcc.gnu.org>:

https://gcc.gnu.org/g:f7bca44d97ad01b39f9d6e7809df7bf517eeb2fb

commit r14-3783-gf7bca44d97ad01b39f9d6e7809df7bf517eeb2fb
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Thu Sep 7 09:59:10 2023 -0400

    [LRA]: Don't reuse chosen insn alternative with special memory constraint

    To speed up GCC, LRA reuses chosen alternative from previous
    constraint subpass.  A spilled pseudo is considered ok for any memory
    constraint although stack slot assigned to the pseudo later might not
    satisfy the chosen alternative constraint.  As we don't consider all insn
    alternatives on the subsequent LRA sub-passes, it might result in LRA
failure
    to generate the correct insn.  This patch solves the problem.

    gcc/ChangeLog:

            PR target/111225
            * lra-constraints.cc (goal_reuse_alt_p): New global flag.
            (process_alt_operands): Set up the flag.  Clear flag for chosen
            alternative with special memory constraints.
            (process_alt_operands): Set up used insn alternative depending on
the flag.

    gcc/testsuite/ChangeLog:

            PR target/111225
            * gcc.target/i386/pr111225.c: New test.