r219842 - in /trunk/gcc: ChangeLog loop-iv.c te...

[ienkovich@gcc.gnu.org]

Author: ienkovich
Date: Mon Jan 19 13:58:54 2015
New Revision: 219842

URL: https://gcc.gnu.org/viewcvs?rev=219842&root=gcc&view=rev
Log:
gcc/

	PR rtl-optimization/64081
	* loop-iv.c (def_pred_latch_p): New function.
	(latch_dominating_def): Allow specific cases with non-single
	definitions.
	(iv_get_reaching_def): Likewise.
	(check_complex_exit_p): New function.
	(check_simple_exit): Use check_complex_exit_p to allow certain cases
	with exits not executing on any iteration.

gcc/testsuite/

	PR rtl-optimization/64081
	* gcc.dg/pr64081.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/pr64081.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/loop-iv.c
    trunk/gcc/testsuite/ChangeLog