[Bug middle-end/70219] [6 Regression] ICE: in delete_move_and_clobber, at lra-constraints.c:5864 with -O2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70219

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Mar 14 22:19:32 2016
New Revision: 234201

URL: https://gcc.gnu.org/viewcvs?rev=234201&root=gcc&view=rev
Log:
        PR middle-end/70219
        * lra-constraints.c (delete_move_and_clobber): Change assertion
        to also allow dregno == 0.

        * gcc.dg/pr70219.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr70219.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lra-constraints.c
    trunk/gcc/testsuite/ChangeLog