re PR debug/47590 (pragma optimize doesn't recompute derived options (was: var tracking produces wrong debug in code where optimization is turned off using pragma))

PR debug/47590
* target.def (delay_sched2, delay_vartrack): New.
* doc/tm.texi.in: Update.
* doc/tm.texi: Rebuild.
* sched-rgn.c (gate_handle_sched2): Fail if delay_sched2.
* var-tracking.c (gate_handle_var_tracking): Likewise.
* config/bfin/bfin.c (bfin_flag_schedule_insns2): Drop.
(bfin_flag_var_tracking): Drop.
(output_file_start): Don't save and override flag_var_tracking.
(bfin_option_override): Ditto flag_schedule_insns_after_reload.
(bfin_reorg): Test original variables.
(TARGET_DELAY_SCHED2, TARGET_DELAY_VARTRACK): Define.
* config/ia64/ia64.c (ia64_flag_schedule_insns2): Drop.
(ia64_flag_var_tracking): Drop.
(TARGET_DELAY_SCHED2, TARGET_DELAY_VARTRACK): Define.
(ia64_file_start): Don't save and override flag_var_tracking.
(ia64_override_options_after_change): Ditto
flag_schedule_insns_after_reload.
(ia64_reorg): Test original variables.
* config/picochip/picochip.c (picochip_flag_schedule_insns2): Drop.
(picochip_flag_var_tracking): Drop.
(TARGET_DELAY_SCHED2, TARGET_DELAY_VARTRACK): Define.
(picochip_option_override): Don't save and override
flag_schedule_insns_after_reload.
(picochip_asm_file_start): Ditto flag_var_tracking.
(picochip_reorg): Test original variables.
* config/spu/spu.c (spu_flag_var_tracking): Drop.
(TARGET_DELAY_VARTRACK): Define.
(spu_var_tracking): New.
(spu_machine_dependent_reorg): Call it.
(asm_file_start): Don't save and override flag_var_tracking.

From-SVN: r174595