[Bug tree-optimization/90892] [9/10 regression] -O2 miscompiles __builtin_strncmp with string containing '\0'

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90892

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Jul  3 08:32:25 2019
New Revision: 272993

URL: https://gcc.gnu.org/viewcvs?rev=272993&root=gcc&view=rev
Log:
Handle '\0' in strcmp in RTL expansion (PR tree-optimization/90892).

2019-07-03  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/90892
        * builtins.c (inline_expand_builtin_string_cmp): Handle '\0'
        in string constants.
2019-07-03  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/90892
        * gcc.dg/pr90892.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr90892.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/testsuite/ChangeLog