PR middle-end/4520
	PR bootstrap/28784
	* cselib.c (cselib_hash_rtx): Avoid hashing on the address of labels
	and symbols.  Instead use the implementation from cse.c's hash_rtx.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116891 138bc75d-0d04-0410-961f-82ee72b054a4