r220491 - in /trunk/gcc: ChangeLog testsuite/Ch...

[spop@gcc.gnu.org]

Author: spop
Date: Fri Feb  6 21:08:13 2015
New Revision: 220491

URL: https://gcc.gnu.org/viewcvs?rev=220491&root=gcc&view=rev
Log:
PR 64878: do not jump thread across more than one back-edge

2015-02-04  Sebastian Pop  <s.pop@samsung.com>
	    Brian Rzycki  <b.rzycki@samsung.com>

	PR tree-optimization/64878
	* tree-ssa-threadedge.c: Include tree-ssa-loop.h.
	(fsm_find_control_statement_thread_paths): Add parameter seen_loop_phi.
	Stop recursion at loop phi nodes after having visited a loop phi node.

	* testsuite/gcc.dg/tree-ssa/ssa-dom-thread-8.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-8.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadedge.c