re PR middle-end/41837 (Using '-O -fipa-struct-reorg -fwhole-program -fprofile-generate' gives 'internal compiler error: Segmentation fault')

	PR middle-end/41837
	* ipa-struct-reorg.c (find_field_in_struct_1): Return NULL if
	fields don't have DECL_NAME.

	* gcc.dg/pr41837.c: New test.

From-SVN: r153670