re PR target/56716 (during gcc 4.8.0 build on Cygwin:  bid128_fma.c:4460:1: internal compiler error: Segmentation fault)

2013-03-27  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/56716
	* tree-ssa-structalias.c (perform_var_substitution): Adjust
	dumping for ref nodes.

From-SVN: r197165