tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p): Properly handle DECL_BIT_...

tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p): Properly handle DECL_BIT_FIELD_REPRESENTATIVE occuring as COMPONENT_REF operand.

2016-06-28  Richard Biener  <rguenther@suse.de>

	* tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p):
	Properly handle DECL_BIT_FIELD_REPRESENTATIVE occuring as
	COMPONENT_REF operand.
	(nonoverlapping_component_refs_p): Likewise.
	* stor-layout.c (start_bitfield_representative): Mark
	DECL_BIT_FIELD_REPRESENTATIVE as DECL_NONADDRESSABLE_P.

From-SVN: r237818