* pt.c (do_decl_instantiation): Downgrade duplicate instantiation

	* pt.c (do_decl_instantiation): Downgrade duplicate instantiation
	errors to pedwarn.
	* typeck.c (comptypes): Simplify C code in look_hard.
	* xref.c (PALLOC): Use xcalloc, not calloc.
	(SALLOC): Use xmalloc, not malloc.
	* rtti.c (synthesize_tinfo_fn): Add missing call to pop_momentary.
	* search.c (note_debug_info_needed): Don't search if WRITE_SYMBOLS
	is NO_DEBUG.
	* decl.c (duplicate_decls): If a redeclaration doesn't match the
	initial declaration, then don't save the inline info and by all
	means don't mark the function as a builtin function.
	* decl.c (lookup_name_real): Set NONCLASS to 1 if
	CURRENT_CLASS_TYPE is 0.
	* class.c (duplicate_tag_error): Set TYPE_NONCOPIED_PARTS to
	NULL_TREE.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@28044 138bc75d-0d04-0410-961f-82ee72b054a4