* config/rs6000/rs6000.h (EXTRA_CONSTRAINT): Add 'a' for indexed

        or indirect address operand.
        (EXTRA_ADDRESS_CONSTRAINT): New.
        * config/rs6000/rs6000.md (prefetch): Change constraint "p" to "a".


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@103056 138bc75d-0d04-0410-961f-82ee72b054a4