[Bug rtl-optimization/98777] [11 Regression] ICE in update_equiv at gcc/lra-constraints.c:504 since r11-6819-g4334b52427420312

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98777

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Vladimir Makarov <vmaka...@gcc.gnu.org>:

https://gcc.gnu.org/g:68ba1039c7daf0485b167fe199ed7e8031158091

commit r11-6844-g68ba1039c7daf0485b167fe199ed7e8031158091
Author: Vladimir N. Makarov <vmaka...@redhat.com>
Date:   Thu Jan 21 17:27:01 2021 -0500

    [PR98777] LRA: Use preliminary created pseudo for in LRA elimination
subpass

    LRA did not extend ira_reg_equiv after generation of a pseudo in
    eliminate_regs_in_insn which might results in LRA crash.  It is better not
    to extend ira_reg_equiv but to use preliminary generated pseudo.  The
    patch implements it.

    gcc/ChangeLog:

            PR rtl-optimization/98777
            * lra-int.h (lra_pmode_pseudo): New extern.
            * lra.c (lra_pmode_pseudo): New global.
            (lra): Set it up.
            * lra-eliminations.c (eliminate_regs_in_insn): Use it.

    gcc/testsuite/ChangeLog:

            PR rtl-optimization/98777
            * gcc.target/riscv/pr98777.c: New.