r237312 - in /trunk/gcc: ChangeLog testsuite/Ch...

[law@gcc.gnu.org]

Author: law
Date: Fri Jun 10 16:23:06 2016
New Revision: 237312

URL: https://gcc.gnu.org/viewcvs?rev=237312&root=gcc&view=rev
Log:
	PR tree-optimization/71335
	* tree-ssa-threadbackward.c (profitable_jump_thread_path): Filter out
	zero length paths here.
	(convert_and_register_jump_thread_path): Remove hacks related to
	duplicated blocks in the jump thread path.
	(fsm_find_control_statement_thread_paths): Avoid putting the same
	block on the thread path twice, but ensure the thread path is
	unchanged from the caller's point of view.

	PR tree-optimization/71335
	* gcc.c-torture/execute/pr71335.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr71335.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadbackward.c