[Bug middle-end/78809] Inline strcmp with small constant strings

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78809

--- Comment #21 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Nov 17 05:32:05 2017
New Revision: 254856

URL: https://gcc.gnu.org/viewcvs?rev=254856&root=gcc&view=rev
Log:
2017-11-15  Qing Zhao <qing.z...@oracle.com>

        PR middle-end/78809
        * gimple-fold.c (gimple_fold_builtin_string_compare): Add handling
        of replacing call to strncmp with corresponding call to strcmp when
        meeting conditions.

        PR middle-end/78809
        * gcc.dg/strcmpopt_1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/strcmpopt_1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog