[Bug rtl-optimization/78526] [7 Regression] ICE: in decompose, at rtl.h:2117 with -g -mavx512bw

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78526

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 25 18:56:50 2016
New Revision: 242882

URL: https://gcc.gnu.org/viewcvs?rev=242882&root=gcc&view=rev
Log:
        PR rtl-optimization/78526
        * simplify-rtx.c (simplify_immed_subreg): Don't use wi::extract_uhwi
        beyond val's precision.

        * gcc.dg/pr78526.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr78526.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/simplify-rtx.c
    trunk/gcc/testsuite/ChangeLog