[Bug tree-optimization/93156] abused nonnull attribute evokes new segfault in gcc 10 since Nov 4 commit, 0fb958ab8aa

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93156

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jan  7 10:05:14 2020
New Revision: 279951

URL: https://gcc.gnu.org/viewcvs?rev=279951&root=gcc&view=rev
Log:
        PR tree-optimization/93156
        * tree-ssa-ccp.c (bit_value_binop): For x * x note that the second
        least significant bit is always clear.

        * gcc.dg/tree-ssa/pr93156.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr93156.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c