* haifa-sched.c (reg_last_clobbers): New.

    * haifa-sched.c (reg_last_clobbers): New.
        (reg_pending_clobbers, bb_reg_last_clobbers): New.
        (compute_block_backward_dependences): Allocate memory for them.
        (schedule_region): Likewise.
        (sched_analyze_1): Clobbers don't interfere with one another.
        They do interfere with sets ...
        (sched_analyze_2): ... and uses.
        (sched_analyze): Likewise.
        (sched_analyze_insn): Update reg_last_clobbers appropriately.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@25628 138bc75d-0d04-0410-961f-82ee72b054a4