* call.c (build_conditional_expr): Never fold in unevaluated context.
	* tree.c (build_aggr_init_expr): Propagate TREE_NOTHROW.
	* semantics.c (simplify_aggr_init_expr): Likewise.
	* typeck.c (merge_types): Call merge_exception_specifiers.
	* decl.c (duplicate_decls): Check DECL_SOURCE_LOCATION rather than
	DECL_ANTICIPATED for preferring new type.

From-SVN: r160296