r192433 - in /trunk/gcc: ChangeLog cfgloopanal....

[hubicka@gcc.gnu.org]

Author: hubicka
Date: Sun Oct 14 16:18:26 2012
New Revision: 192433

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192433
Log:

	* tree-ssa-loop-niter.c (estimate_numbers_of_iterations_loop): Do not
	predict loops with multiple exits realistically.
	* cfgloopanal.c (single_likely_exit): New function.

	* gcc.dg/unroll_5.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/unroll_5.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgloopanal.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-niter.c