re PR tree-optimization/41841 (segfault using '-O -fipa-cp -fipa-struct-reorg -fwhole-program -fprofile-generate')

	PR tree-optimization/41841
	* ipa-struct-reorg.c (build_data_structure): Don't attempt to look at
	local variables of not yet materialized clones.

	* gcc.dg/pr41841.c: New test.

From-SVN: r153807