re PR tree-optimization/47541 (For integer pointers, the value of ++*p  is not written back to memory)

2011-02-01  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47541
	* tree-ssa-structalias.c (push_fields_onto_fieldstack): Make
	sure to have a field at offset zero.

	* g++.dg/torture/pr47541.C: New testcase.

From-SVN: r169468