[Bug tree-optimization/80443] [7 Regression] ICE on valid code at -O2 on x86_64-linux-gnu: in set_value_range, at tree-vrp.c:367

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80443

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 18 19:17:32 2017
New Revision: 246981

URL: https://gcc.gnu.org/viewcvs?rev=246981&root=gcc&view=rev
Log:
        PR tree-optimization/80443
        * tree-vrp.c (intersect_ranges): For signed 1-bit precision type,
        instead of adding 1, subtract -1 and similarly instead of subtracting
        1 add -1.

        * gcc.c-torture/compile/pr80443.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr80443.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c