re PR tree-optimization/61438 (ICE on valid code at -O3 on x86_64-linux-gnu in in...

re PR tree-optimization/61438 (ICE on valid code at -O3 on x86_64-linux-gnu in in loop_preheader_edge, at cfgloop.c:1668)

2014-06-10  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/61438
	* tree-ssa-pre.c (eliminate_dom_walker): Add do_pre member.
	(eliminate_dom_walker::before_dom_children): Only try to inhibit
	insertion of IVs if running PRE.
	(eliminate): Adjust.
	(pass_pre::execute): Likewise.
	(pass_fre::execute): Likewise.

	* gcc.dg/torture/pr61438.c: New testcase.

From-SVN: r211413