expr.c (expand_builtin, [...]): Set MEM_IN_STRUCT_P if the argument is the address of a structure or array.

	* expr.c (expand_builtin, case MEMSET): Set MEM_IN_STRUCT_P
	if the argument is the address of a structure or array.
	* configure.in: Enable Haifa scheduler by default for SPARC.

From-SVN: r19405