This replaces insn_rtx_cost with insn_cost if an insn is readily
available, and with pattern_cost otherwise.
* cfgrtl.c (rtl_account_profile_record): Replace insn_rtx_cost with
insn_cost.
* combine.c (uid_insn_cost): Adjust comment.
(combine_validate_cost): Adjust comment. Use pattern_cost instead
of insn_rtx_cost
(combine_instructions): Use insn_cost instead of insn_rtx_cost.
* dse.c (find_shift_sequence): Ditto.
* ifcvt.c (cheap_bb_rtx_cost_p): Ditto.
(bb_valid_for_noce_process_p): Use pattern_cost.
* rtl.h (insn_rtx_cost): Delete.
(pattern_cost): New prototype.
(insn_cost): New prototype.
* rtlanal.c (insn_rtx_cost): Rename to...
(pattern_cost): ... this.
(insn_cost): New.
From-SVN: r253560
