rs6000.h: (rs6000_sched_insert_nops): support new flag -minsert-sched-nops.
* config/rs6000/rs6000.h: (rs6000_sched_insert_nops):
support new flag -minsert-sched-nops.
(DEFAULT_SCHED_FINISH_NOP_INSERTION_SCHEME): Define.
* config/rs6000/rs6000.c: (rs6000_sched_insert_nops):
support new flag -minsert-sched-nops.
(is_cracked_insn, is_microcoded_insn): New functions.
(rs6000_sched_finish): New function.
(rs6000_issue_rate): Return 5 for power4.
(get_next_active_insn, insn_terminates_group_p): New
functions.
(is_costly_group, force_new_group): New functions.
(redefine_groups, pad_groups): New functions.
(rs6000_variable_issue): Use new functions.
* doc/invoke.texi (-minsert-sched-nops): Document new
option.
From-SVN: r72707