2010-09-10  Richard Guenther  <rguenther@suse.de>

	* tree.c (type_hash_eq): For ARRAY_TYPEs also compare
	TYPE_SIZE.
	(build_index_type): Implement in terms of build_range_type.
	(build_range_type): Do not allow NULL_TREE type, improve
	hashing to cover more cases.  Set TYPE_STRUCTURAL_EQUALITY_P
	if we didn't hash.
	* c-decl.c (grokdeclarator): When modifying TYPE_SIZE manually
	create a distinct copy of the type.

From-SVN: r164174