[Bug rtl-optimization/86902] [9 Regression] ICE: in as_a, at machmode.h:356 at -O

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86902

--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Sep 19 17:38:11 2018
New Revision: 264426

URL: https://gcc.gnu.org/viewcvs?rev=264426&root=gcc&view=rev
Log:
combine: Use correct mode in new comparison (PR86902)

This code in try_combine uses the wrong mode.  This fails (with RTL
checking) in trunk, but not in any released branches.


        PR rtl-optimization/86902
        * combine.c (try_combine): When changing the CC mode used, don't change
        an unrelated mode in other_insn to that new CC mode.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c