[Bug tree-optimization/89536] [8/9 Regression] wrong code at -Os and above on x86_64-linux-gnu

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89536

--- Comment #20 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Feb 28 23:03:01 2019
New Revision: 269289

URL: https://gcc.gnu.org/viewcvs?rev=269289&root=gcc&view=rev
Log:
        PR tree-optimization/89536
        * tree-ssa-dom.c (edge_info::derive_equivalences) <BIT_NOT_EXPR>: Test
        only whether bit #0 of the value is 0 instead of the entire value.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/20190228-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-dom.c