alias.c (get_alias_set): Don't call language-specific routine more than is needed...

alias.c (get_alias_set): Don't call language-specific routine more than is needed and clean up code a bit.

	* alias.c (get_alias_set): Don't call language-specific routine more
	than is needed and clean up code a bit.
	* c-common.c (c_get_alias_set): All references whose type
	is char get alias set 0, but character types need not.
	* varasm.c (make_function_rtl): Don't call set_mem_attributes.
	(make_decl_rtl): Don't call it for FUNCTION_DECL.

From-SVN: r34341