RFA: A tiny patch solving problem of switching off dfa scheduler

["Vladimir N. Makarov" <vmakarov at redhat dot com>]

The following patch solves the problem mentioned in

http://gcc.gnu.org/ml/gcc/2003-09/msg00237.html

The patch has been tested on x86.

Vlad


2003-09-05  Vladimir Makarov  <vmakarov@redhat.com>

        * haifa-sched.c (schedule_block): Use ready_remove_first instead

        of choose_ready for non-dfa insn scheduling.

Index: haifa-sched.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/haifa-sched.c,v
retrieving revision 1.228
diff -6 -c -p -r1.228 haifa-sched.c
*** haifa-sched.c       19 Aug 2003 23:21:59 -0000      1.228
--- haifa-sched.c       5 Sep 2003 21:26:46 -0000
*************** schedule_block (int b, int rgn_n_insns)
*** 2243,2255 ****
          if (!targetm.sched.use_dfa_pipeline_interface
              || !(*targetm.sched.use_dfa_pipeline_interface) ())
            {
              if (ready.n_ready == 0 || !can_issue_more
                  || !(*current_sched_info->schedule_more_p) ())
                break;
!             insn = choose_ready (&ready);
              cost = actual_hazard (insn_unit (insn), insn, clock_var,
0);
            }
          else
            {
              if (ready.n_ready == 0 || !can_issue_more
                  || state_dead_lock_p (curr_state)
--- 2243,2255 ----
          if (!targetm.sched.use_dfa_pipeline_interface
              || !(*targetm.sched.use_dfa_pipeline_interface) ())
            {
              if (ready.n_ready == 0 || !can_issue_more
                  || !(*current_sched_info->schedule_more_p) ())
                break;
!             insn = ready_remove_first (&ready);
              cost = actual_hazard (insn_unit (insn), insn, clock_var,
0);
            }
          else
            {
              if (ready.n_ready == 0 || !can_issue_more
                  || state_dead_lock_p (curr_state)