[Bug middle-end/85414] [8 Regression] ICE: in ix86_expand_prologue, at config/i386/i386.c:13810 with -Og -fgcse

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85414

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 17 09:16:48 2018
New Revision: 259433

URL: https://gcc.gnu.org/viewcvs?rev=259433&root=gcc&view=rev
Log:
        PR middle-end/85414
        * rtlhooks.c (gen_lowpart_if_possible): Don't call gen_lowpart_SUBREG
        on a SUBREG.

        * gcc.dg/pr85414.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr85414.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/rtlhooks.c
    trunk/gcc/testsuite/ChangeLog