r254856 - in /trunk/gcc: ChangeLog gimple-fold....

[law@gcc.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.zhao@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