haifa-sched.c (sched_reg_n_calls_crossed): Delete.

        * haifa-sched.c (sched_reg_n_calls_crossed): Delete.
        (sched_reg_live_length, sched_reg_basic_block): Delete.
        (current_block_num, bb_live_regs, old_live_regs): Delete.
        (dead_notes, struct sometimes): Delete.
        (sched_note_set, birthing_insn_p): Delete.
        (adjust_priority): Gut useless reg lifetime code.
        (create_reg_dead_note, attach_deaths): Delete.
        (attach_deaths_insn, new_sometimes_live): Delete.
        (finish_sometimes_live): Delete.
        (find_pre_sched_live, find_post_sched_live): Delete.
        (update_reg_usage): Delete.
        (find_insn_reg_weight): New, from corpse of find_pre_sched_live.
        (schedule_insns): Delete reg lifetime code.
        (sched_analyze): Use REG_SAVE_NOTE to stuff NOTE_INSN notes away.
        (unlink_other_notes): Adjust REG_NOTE commentary.
        (reemit_notes): Use REG_SAVE_NOTE.
        (schedule_block): Likewise.
        (schedule_region): Allocate bitmap of blocks in region.  Use
        count_or_remove_death_notes.  Use update_life_info.

        * rtl.h (REG_SAVE_NOTE): New.
        * rtl.c (reg_note_name): Update.

From-SVN: r29894

gcc/ChangeLog

+Sun Oct 10 16:37:01 1999  Richard Henderson  <rth@cygnus.com>
+
+	* haifa-sched.c (sched_reg_n_calls_crossed): Delete.
+	(sched_reg_live_length, sched_reg_basic_block): Delete.
+	(current_block_num, bb_live_regs, old_live_regs): Delete.
+	(dead_notes, struct sometimes): Delete.
+	(sched_note_set, birthing_insn_p): Delete.
+	(adjust_priority): Gut useless reg lifetime code.
+	(create_reg_dead_note, attach_deaths): Delete.
+	(attach_deaths_insn, new_sometimes_live): Delete.
+	(finish_sometimes_live): Delete.
+	(find_pre_sched_live, find_post_sched_live): Delete.
+	(update_reg_usage): Delete.
+	(find_insn_reg_weight): New, from corpse of find_pre_sched_live.
+	(schedule_insns): Delete reg lifetime code.
+	(sched_analyze): Use REG_SAVE_NOTE to stuff NOTE_INSN notes away.
+	(unlink_other_notes): Adjust REG_NOTE commentary.
+	(reemit_notes): Use REG_SAVE_NOTE.
+	(schedule_block): Likewise.
+	(schedule_region): Allocate bitmap of blocks in region.  Use
+	count_or_remove_death_notes.  Use update_life_info.
+
+	* rtl.h (REG_SAVE_NOTE): New.
+	* rtl.c (reg_note_name): Update.
+	
 Sun Oct 10 16:14:16 1999  Richard Henderson  <rth@cygnus.com>
 
 	* combine.c (refresh_blocks, need_refresh): New.

gcc/rtl.c

@@ -257,7 +257,7 @@ const char * const reg_note_name[] = { "", "REG_DEAD", "REG_INC", "REG_EQUIV", "
 			  "REG_EXEC_COUNT", "REG_NOALIAS", "REG_SAVE_AREA",
 			  "REG_BR_PRED", "REG_EH_CONTEXT",
 			  "REG_FRAME_RELATED_EXPR", "REG_EH_REGION",
-			  "REG_EH_RETHROW" };
+			  "REG_EH_RETHROW", "REG_SAVE_NOTE" };
 
 static void dump_and_abort	PROTO((int, int, FILE *)) ATTRIBUTE_NORETURN;
 static void read_name		PROTO((char *, FILE *));

gcc/rtl.h

@@ -456,8 +456,8 @@ extern void rtvec_check_failed_bounds PROTO((rtvec, int,
    flags computed by get_jump_flags() after dbr scheduling is complete.
      REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
    but are too complex for DWARF to interpret what they imply.  The attached
-   rtx is used instead of intuition.  */
-/*   REG_EH_REGION is used to indicate what exception region an INSN
+   rtx is used instead of intuition.
+     REG_EH_REGION is used to indicate what exception region an INSN
    belongs in.  This can be used to indicate what region a call may throw
    to. a REGION of 0 indicates that a call cannot throw at all.
    a REGION  of -1 indicates that it cannot throw, nor will it execute
@@ -465,8 +465,9 @@ extern void rtvec_check_failed_bounds PROTO((rtvec, int,
      REG_EH_RETHROW is used to indicate that a call is actually a
    call to rethrow, and specifies the rethrow symbol for the region 
    the rethrow is targetting.  This provides a way to generate the 
-   non standard flow edges required for a rethrow. */
-   
+   non standard flow edges required for a rethrow.
+     REG_SAVE_NOTE is used by haifa-sched to save NOTE_INSN notes 
+   across scheduling.  */
 
 #define REG_NOTES(INSN)	XEXP(INSN, 6)
 
@@ -481,7 +482,7 @@ enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4,
 		REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19,
 		REG_BR_PRED = 20, REG_EH_CONTEXT = 21,
 		REG_FRAME_RELATED_EXPR = 22, REG_EH_REGION = 23,
-		REG_EH_RETHROW = 24 };
+		REG_EH_RETHROW = 24, REG_SAVE_NOTE = 25 };
 /* The base value for branch probability notes.  */
 #define REG_BR_PROB_BASE  10000