121    The information in the line number notes is carefully retained by
122    this pass.  Notes that refer to the starting and ending of
207 /* List of important notes we must keep around.  This is a pointer to the
509 /* Notes handling mechanism:
511    Generally, NOTES are saved before scheduling and restored after scheduling.
512    The scheduler distinguishes between three types of notes:
514    (1) LINE_NUMBER notes, generated and used for debugging.  Here,
521    (2) LOOP_BEGIN, LOOP_END, SETJMP, EHREGION_BEG, EHREGION_END notes:
527    (3) All other notes (e.g. INSN_DELETED):  Before scheduling a block,
528    these notes are put in a list (in rm_other_notes() and
529    unlink_other_notes ()).  After scheduling the block, these notes are
1107      notes, which we removed in schedule_region.  Nor did it try to  in adjust_priority()
1230 /* Functions for handling of notes.  */
1232 /* Delete notes beginning with INSN and put them in the chain
1233    of notes ended by NOTE_LIST.
1234    Returns the insn following the notes.  */
1267 	  /* Insert the note at the end of the notes list.  */  in unlink_other_notes()
1279 /* Delete line notes beginning with INSN. Record line-number notes so
1280    they can be reused.  Returns the insn following the notes.  */
1312 	  /* Record line-number notes so they can be reused.  */  in unlink_line_notes()
1334   /* Don't include any notes or labels at the beginning of the BEG  in get_ebb_head_tail()
1335      basic block, or notes at the end of the END basic blocks.  */  in get_ebb_head_tail()
1376 /* Delete line notes from one block. Save them so they can be later restored
1378    block in which notes should be processed.  */
1391       /* Farm out notes, and maybe save them in NOTE_LIST.  in rm_line_notes()
1404 /* Save line number notes for each insn in block B.  HEAD and TAIL are
1405    the boundaries of the block in which notes should be processed.  */
1429 /* After a block was scheduled, insert line notes into the insns list.
1430    HEAD and TAIL are the boundaries of the block in which notes should
1454      the line-number notes as needed.  */  in restore_line_notes()
1458   /* This used to emit line number notes before every non-deleted note.  in restore_line_notes()
1459      However, this confuses a debugger, because line notes not separated  in restore_line_notes()
1461      use for line number notes before other notes, so none are emitted.  */  in restore_line_notes()
1497     fprintf (sched_dump, ";; added %d line-number notes\n", added_notes);  in restore_line_notes()
1500 /* After scheduling the function, delete redundant line notes from the
1509   int notes = 0;  in rm_redundant_line_notes()  local
1511   /* Walk the insns deleting redundant line-number notes.  Many of these  in rm_redundant_line_notes()
1520 	    notes++;  in rm_redundant_line_notes()
1533 	    notes++;  in rm_redundant_line_notes()
1548   if (sched_verbose && notes)  in rm_redundant_line_notes()
1549     fprintf (sched_dump, ";; deleted %d line-number notes\n", notes);  in rm_redundant_line_notes()
1552 /* Delete notes between HEAD and TAIL and put them in the chain
1553    of notes ended by NOTE_LIST.  */
1570       /* Farm out notes, and maybe save them in NOTE_LIST.  in rm_other_notes()
1915    NOTEs.  The REG_SAVE_NOTE note following first one is contains the
1917    NOTE_INSN_EH_REGION_{BEG,END} NOTEs.  */
1936 /* Move INSN.  Reemit notes if needed.  Update CFG, if needed.  */
2356   /* Now we can restore basic block notes and maintain precise cfg.  */  in schedule_block()
2665   /* Restore-other-notes: NOTE_LIST is the end of a chain of notes  in schedule_block()
2837 	   really need separate IDs for notes and we don't want to  in sched_init()
2839 	   line-number notes, i.e., depending on whether or not we're  in sched_init()
2862      removing death notes.  */  in sched_init()
4032 /* The function saves line notes at the beginning of block B.  */
4045      notes in a basic block.  */  in associate_line_notes_with_blocks()
4123 /* Unlink basic block notes and labels and saves them, so they
4124    can be easily restored.  We unlink basic block notes in EBB to
4127    current_sched_info->{head and tail}.  We restore these notes as soon
4134   /* We DON'T unlink basic block notes of the first block in the ebb.  */  in unlink_bb_notes()
4173 /* Restore basic block notes.
4181   /* We DON'T unlink basic block notes of the first block in the ebb.  */  in restore_bb_notes()