[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 #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Jul  4 09:03:56 2019
New Revision: 273074

URL: https://gcc.gnu.org/viewcvs?rev=273074&root=gcc&view=rev
Log:
Backport r272993

2019-07-04  Martin Liska  <mliska@suse.cz>

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

        PR tree-optimization/90892
        * builtins.c (inline_expand_builtin_string_cmp): Handle '\0'
        in string constants.
2019-07-04  Martin Liska  <mliska@suse.cz>

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

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

Added:
    branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr90892.c
Modified:
    branches/gcc-9-branch/gcc/ChangeLog
    branches/gcc-9-branch/gcc/builtins.c
    branches/gcc-9-branch/gcc/testsuite/ChangeLog