[Bug rtl-optimization/104400] [12 Regression] v850e lra/reload failure after recent change

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104400

--- 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:274a4d29421e73c9b40c1641986c6ed904e20184

commit r12-7200-g274a4d29421e73c9b40c1641986c6ed904e20184
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Fri Feb 11 09:52:14 2022 -0500

    [PR104400] LRA: Modify exclude start hard register calculation for insn
alternative

    v850 target has an interesting insn alternative constraint 'e!r' where e
    denotes even general regs and e is a subset of r.  We cannot just make
    union of exclude start hard registers for e and r and should use only
    exclude start hard registers of r.  The following patch implements this.

    gcc/ChangeLog:

            PR rtl-optimization/104400
            * lra-constraints.cc (process_alt_operands): Don't make union of
            this_alternative_exclude_start_hard_regs when reg class in insn
            alternative covers other reg classes in the same alternative.

    gcc/testsuite/ChangeLog:

            PR rtl-optimization/104400
            * gcc.target/v850/pr104400.c: New.
            * gcc.target/v850/v850.exp: New.