emit-rtl.c: more typesafety

This patch converts various rtx to rtx_insn * (or rtx_code_label *).
It also convert the various "_loc" params from int to location_t

gcc/ChangeLog:
	* config/arc/arc.c (hwloop_optimize): Strengthen local "end_label"
	from rtx to rtx_insn *.
	* config/bfin/bfin.c (hwloop_optimize): Likewise for local
	"label".
	(add_sched_insns_for_speculation): Likewise for local "target",
	converting usage of JUMP_LABEL to JUMP_LABEL_AS_INSN.
	* config/c6x/c6x.c (reorg_split_calls): Strengthen param "call_labels"
	from rtx_insn ** to rtx_code_label **.
	(reorg_emit_nops): Likewise.
	(c6x_reorg): Likewise for local "call_labels".
	* config/sh/sh-protos.h (get_dest_uid): Strengthen 1st param from
	rtx to rtx_insn *.
	* config/sh/sh.c (dump_table): Strengthen local "lab" from rtx to
	rtx_code_label *, adding safe_as_a <rtx_code_label *> casts to
	the loops over LABEL_REFS.
	(fixup_addr_diff_vecs): Add as_a <rtx_insn *> to usage of
	braf_label.
	(barrier_align): Convert usage of JUMP_LABEL to JUMP_LABEL_AS_INSN.
	(get_dest_uid): Strengthen param "label" from rtx to rtx_insn *.
	(split_branches): Strengthen local "olabel" from rtx to
	rtx_insn *, adding a safe_as_a cast.
	* emit-rtl.c (next_real_insn): Strengthen param from "rtx"
	to "rtx_insn *".
	(add_insn_after): Likewise for first two params.
	(add_insn_before): Likewise.
	(remove_insn): Likewise for param.
	(emit_pattern_before_noloc): Likewise for second and third params.
	(emit_jump_insn_before_noloc): Convert NULL_RTX to NULL.
	(emit_call_insn_before_noloc): Likewise.
	(emit_debug_insn_before_noloc): Strengthen "before" param from "rtx"
	to "rtx_insn *".
	(emit_barrier_before): Likewise.
	(emit_label_before): Strengthen "label" param from "rtx" to
	"rtx_code_label *".  Strengthen "before" param from "rtx" to
	"rtx_insn *".
	(emit_insn_after_1): Strengthen "after" param from "rtx" to
	"rtx_insn *".
	(emit_pattern_after_noloc): Likewise.
	(emit_insn_after_noloc): Likewise.
	(emit_jump_insn_after_noloc): Likewise.
	(emit_call_insn_after_noloc): Likewise.
	(emit_debug_insn_after_noloc): Likewise.
	(emit_barrier_after): Likewise.
	(emit_label_after): Likewise for both params.
	(emit_pattern_after_setloc): Likewise for "after" param.  Convert
	"loc" param from "int" to "location_t".
	(emit_insn_after_setloc): Likewise.
	(emit_jump_insn_after_setloc): Likewise.
	(emit_call_insn_after_setloc): Likewise.
	(emit_debug_insn_after_setloc): Likewise.
	(emit_pattern_before_setloc): Likewise for "before" param.  Convert
	"loc" param from "int" to "location_t".
	(emit_pattern_before): Convert NULL_RTX to NULL.
	(emit_insn_before_setloc): Convert "loc" param from "int" to
	"location_t".
	(emit_jump_insn_before_setloc): Likewise.
	(emit_call_insn_before_setloc): Likewise.
	(emit_debug_insn_before_setloc): Strengthen "before" param from rtx to
	rtx_insn *.  Convert "loc" param from "int" to "location_t".
	* rtl.h (emit_insn_before_setloc, emit_jump_insn_before_setloc,
	emit_call_insn_before_setloc, emit_debug_insn_before_setloc):
	Convert 3rd param from "int" to "location_t".
	(emit_barrier_before, emit_barrier_after, next_real_insn):
	Strengthen param from rtx to rtx_insn *.
	(emit_label_before): Strengthen 1st param from "rtx" to
	"rtx_code_label *".  Strengthen 2nd param from "rtx" to
	"rtx_insn *".
	(emit_insn_after_noloc, emit_jump_insn_after_noloc,
	emit_call_insn_after_noloc, emit_debug_insn_after_noloc):
	Strengthen 2nd param from "rtx" to "rtx_insn *".
	(emit_insn_after_setloc, emit_jump_insn_after_setloc)
	emit_call_insn_after_setloc, emit_debug_insn_after_setloc):
	Likewise. Convert 3rd param from "int" to "location_t".
	(emit_label_after): Strengthen 1st param from "rtx" to
	"rtx_code_label *".
	(next_real_insn, remove_insn): Strengthen param from "rtx" to
	"rtx_insn *".
	(add_insn_before, add_insn_after): Strengthen 1st and 2nd params
	from "rtx" to "rtx_insn *".

From-SVN: r261547

gcc/ChangeLog

+2018-06-13  David Malcolm  <dmalcolm@redhat.com>
+
+	* config/arc/arc.c (hwloop_optimize): Strengthen local "end_label"
+	from rtx to rtx_insn *.
+	* config/bfin/bfin.c (hwloop_optimize): Likewise for local
+	"label".
+	(add_sched_insns_for_speculation): Likewise for local "target",
+	converting usage of JUMP_LABEL to JUMP_LABEL_AS_INSN.
+	* config/c6x/c6x.c (reorg_split_calls): Strengthen param "call_labels"
+	from rtx_insn ** to rtx_code_label **.
+	(reorg_emit_nops): Likewise.
+	(c6x_reorg): Likewise for local "call_labels".
+	* config/sh/sh-protos.h (get_dest_uid): Strengthen 1st param from
+	rtx to rtx_insn *.
+	* config/sh/sh.c (dump_table): Strengthen local "lab" from rtx to
+	rtx_code_label *, adding safe_as_a <rtx_code_label *> casts to
+	the loops over LABEL_REFS.
+	(fixup_addr_diff_vecs): Add as_a <rtx_insn *> to usage of
+	braf_label.
+	(barrier_align): Convert usage of JUMP_LABEL to JUMP_LABEL_AS_INSN.
+	(get_dest_uid): Strengthen param "label" from rtx to rtx_insn *.
+	(split_branches): Strengthen local "olabel" from rtx to
+	rtx_insn *, adding a safe_as_a cast.
+	* emit-rtl.c (next_real_insn): Strengthen param from "rtx"
+	to "rtx_insn *".
+	(add_insn_after): Likewise for first two params.
+	(add_insn_before): Likewise.
+	(remove_insn): Likewise for param.
+	(emit_pattern_before_noloc): Likewise for second and third params.
+	(emit_jump_insn_before_noloc): Convert NULL_RTX to NULL.
+	(emit_call_insn_before_noloc): Likewise.
+	(emit_debug_insn_before_noloc): Strengthen "before" param from "rtx"
+	to "rtx_insn *".
+	(emit_barrier_before): Likewise.
+	(emit_label_before): Strengthen "label" param from "rtx" to
+	"rtx_code_label *".  Strengthen "before" param from "rtx" to
+	"rtx_insn *".
+	(emit_insn_after_1): Strengthen "after" param from "rtx" to
+	"rtx_insn *".
+	(emit_pattern_after_noloc): Likewise.
+	(emit_insn_after_noloc): Likewise.
+	(emit_jump_insn_after_noloc): Likewise.
+	(emit_call_insn_after_noloc): Likewise.
+	(emit_debug_insn_after_noloc): Likewise.
+	(emit_barrier_after): Likewise.
+	(emit_label_after): Likewise for both params.
+	(emit_pattern_after_setloc): Likewise for "after" param.  Convert
+	"loc" param from "int" to "location_t".
+	(emit_insn_after_setloc): Likewise.
+	(emit_jump_insn_after_setloc): Likewise.
+	(emit_call_insn_after_setloc): Likewise.
+	(emit_debug_insn_after_setloc): Likewise.
+	(emit_pattern_before_setloc): Likewise for "before" param.  Convert
+	"loc" param from "int" to "location_t".
+	(emit_pattern_before): Convert NULL_RTX to NULL.
+	(emit_insn_before_setloc): Convert "loc" param from "int" to
+	"location_t".
+	(emit_jump_insn_before_setloc): Likewise.
+	(emit_call_insn_before_setloc): Likewise.
+	(emit_debug_insn_before_setloc): Strengthen "before" param from rtx to
+	rtx_insn *.  Convert "loc" param from "int" to "location_t".
+	* rtl.h (emit_insn_before_setloc, emit_jump_insn_before_setloc,
+	emit_call_insn_before_setloc, emit_debug_insn_before_setloc):
+	Convert 3rd param from "int" to "location_t".
+	(emit_barrier_before, emit_barrier_after, next_real_insn):
+	Strengthen param from rtx to rtx_insn *.
+	(emit_label_before): Strengthen 1st param from "rtx" to
+	"rtx_code_label *".  Strengthen 2nd param from "rtx" to
+	"rtx_insn *".
+	(emit_insn_after_noloc, emit_jump_insn_after_noloc,
+	emit_call_insn_after_noloc, emit_debug_insn_after_noloc):
+	Strengthen 2nd param from "rtx" to "rtx_insn *".
+	(emit_insn_after_setloc, emit_jump_insn_after_setloc)
+	emit_call_insn_after_setloc, emit_debug_insn_after_setloc):
+	Likewise. Convert 3rd param from "int" to "location_t".
+	(emit_label_after): Strengthen 1st param from "rtx" to
+	"rtx_code_label *".
+	(next_real_insn, remove_insn): Strengthen param from "rtx" to
+	"rtx_insn *".
+	(add_insn_before, add_insn_after): Strengthen 1st and 2nd params
+	from "rtx" to "rtx_insn *".
+
 2018-06-13  Jan Hubicka  <hubicka@gcc.gnu.org>
 
 	* cgraph.c (cgraph_node::get_untransformed_body): Dump function

gcc/config/arc/arc.c

@@ -7306,8 +7306,8 @@ hwloop_optimize (hwloop_info loop)
   int i;
   edge entry_edge;
   basic_block entry_bb, bb;
-  rtx iter_reg, end_label;
-  rtx_insn *insn, *seq, *entry_after, *last_insn;
+  rtx iter_reg;
+  rtx_insn *insn, *seq, *entry_after, *last_insn, *end_label;
   unsigned int length;
   bool need_fix = false;
   rtx lp_reg = gen_rtx_REG (SImode, LP_COUNT);

gcc/config/bfin/bfin.c

@@ -3773,7 +3773,7 @@ hwloop_optimize (hwloop_info loop)
      point.  */
   if (!loop->incoming_src && loop->head != loop->incoming_dest)
     {
-      rtx label = BB_HEAD (loop->incoming_dest);
+      rtx_insn *label = BB_HEAD (loop->incoming_dest);
       /* If we're jumping to the final basic block in the loop, and there's
 	 only one cheap instruction before the end (typically an increment of
 	 an induction variable), we can just emit a copy here instead of a
@@ -4607,7 +4607,7 @@ add_sched_insns_for_speculation (void)
 	  && any_condjump_p (insn)
 	  && (cbranch_predicted_taken_p (insn)))
 	{
-	  rtx target = JUMP_LABEL (insn);
+	  rtx_insn *target = JUMP_LABEL_AS_INSN (insn);
 	  rtx_insn *next = next_real_insn (target);
 
 	  if (GET_CODE (PATTERN (next)) == UNSPEC_VOLATILE

gcc/config/c6x/c6x.c

@@ -4835,7 +4835,7 @@ find_last_same_clock (rtx_insn *insn)
    the SEQUENCEs that represent execute packets.  */
 
 static void
-reorg_split_calls (rtx_insn **call_labels)
+reorg_split_calls (rtx_code_label **call_labels)
 {
   unsigned int reservation_mask = 0;
   rtx_insn *insn = get_insns ();
@@ -5009,7 +5009,7 @@ reorg_split_calls (rtx_insn **call_labels)
    scheduling was run earlier.  */
 
 static void
-reorg_emit_nops (rtx_insn **call_labels)
+reorg_emit_nops (rtx_code_label **call_labels)
 {
   bool first;
   rtx last_call;
@@ -5947,7 +5947,7 @@ c6x_reorg (void)
     }
   sched_no_dce = false;
 
-  rtx_insn **call_labels = XCNEWVEC (rtx_insn *, get_max_uid () + 1);
+  rtx_code_label **call_labels = XCNEWVEC (rtx_code_label *, get_max_uid () + 1);
 
   reorg_split_calls (call_labels);
 

gcc/config/sh/sh-protos.h

@@ -88,7 +88,7 @@ extern int shl_sext_length (rtx);
 extern bool gen_shl_sext (rtx, rtx, rtx, rtx);
 extern int regs_used (rtx, int);
 extern void fixup_addr_diff_vecs (rtx_insn *);
-extern int get_dest_uid (rtx, int);
+extern int get_dest_uid (rtx_insn *, int);
 extern void final_prescan_insn (rtx_insn *, rtx *, int);
 extern enum tls_model tls_symbolic_operand (rtx, machine_mode);
 extern bool system_reg_operand (rtx, machine_mode);

gcc/config/sh/sh.c

@@ -4583,7 +4583,7 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 {
   rtx_insn *scan = barrier;
   bool need_align = true;
-  rtx lab;
+  rtx_code_label *lab;
   label_ref_list_t ref;
   bool have_df = false;
 
@@ -4600,7 +4600,8 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 	      scan = emit_insn_after (gen_align_2 (), scan);
 	      need_align = false;
 	    }
-	  for (lab = p->label; lab; lab = LABEL_REFS (lab))
+	  for (lab = p->label; lab;
+	       lab = safe_as_a <rtx_code_label *> (LABEL_REFS (lab)))
 	    scan = emit_label_after (lab, scan);
 	  scan = emit_insn_after (gen_consttable_2 (p->value, const0_rtx),
 				  scan);
@@ -4627,7 +4628,7 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 	    rtx src = SET_SRC (XVECEXP (PATTERN (start), 0, 0));
 	    rtx lab = XEXP (XVECEXP (src, 0, 3), 0);
 
-	    scan = emit_label_after (lab, scan);
+	    scan = emit_label_after (as_a <rtx_insn *> (lab), scan);
 	  }
     }
   if (TARGET_FMOVD && TARGET_ALIGN_DOUBLE && have_df)
@@ -4650,7 +4651,8 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 	    case E_SFmode:
 	      if (align_insn && !p->part_of_sequence_p)
 		{
-		  for (lab = p->label; lab; lab = LABEL_REFS (lab))
+		  for (lab = p->label; lab;
+		       lab = safe_as_a <rtx_code_label *> (LABEL_REFS (lab)))
 		    emit_label_before (lab, align_insn);
 		  emit_insn_before (gen_consttable_4 (p->value, const0_rtx),
 				    align_insn);
@@ -4666,7 +4668,8 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 		}
 	      else
 		{
-		  for (lab = p->label; lab; lab = LABEL_REFS (lab))
+		  for (lab = p->label; lab;
+		       lab = safe_as_a <rtx_code_label *> (LABEL_REFS (lab)))
 		    scan = emit_label_after (lab, scan);
 		  scan = emit_insn_after (gen_consttable_4 (p->value,
 							    const0_rtx), scan);
@@ -4682,7 +4685,8 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 		}
 	      /* FALLTHRU */
 	    case E_DImode:
-	      for (lab = p->label; lab; lab = LABEL_REFS (lab))
+	      for (lab = p->label; lab;
+		   lab = safe_as_a <rtx_code_label *> (LABEL_REFS (lab)))
 		scan = emit_label_after (lab, scan);
 	      scan = emit_insn_after (gen_consttable_8 (p->value, const0_rtx),
 				      scan);
@@ -4721,7 +4725,8 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 	      scan = emit_label_after (gen_label_rtx (), scan);
 	      scan = emit_insn_after (gen_align_4 (), scan);
 	    }
-	  for (lab = p->label; lab; lab = LABEL_REFS (lab))
+	  for (lab = p->label; lab;
+	       lab = safe_as_a <rtx_code_label *> (LABEL_REFS (lab)))
 	    scan = emit_label_after (lab, scan);
 	  scan = emit_insn_after (gen_consttable_4 (p->value, const0_rtx),
 				  scan);
@@ -4734,7 +4739,8 @@ dump_table (rtx_insn *start, rtx_insn *barrier)
 	      scan = emit_label_after (gen_label_rtx (), scan);
 	      scan = emit_insn_after (gen_align_4 (), scan);
 	    }
-	  for (lab = p->label; lab; lab = LABEL_REFS (lab))
+	  for (lab = p->label; lab;
+	       lab = safe_as_a <rtx_code_label *> (LABEL_REFS (lab)))
 	    scan = emit_label_after (lab, scan);
 	  scan = emit_insn_after (gen_consttable_8 (p->value, const0_rtx),
 				  scan);
@@ -5706,7 +5712,7 @@ fixup_addr_diff_vecs (rtx_insn *first)
       /* Emit the reference label of the braf where it belongs, right after
 	 the casesi_jump_2 (i.e. braf).  */
       braf_label = XEXP (XEXP (SET_SRC (XVECEXP (prevpat, 0, 0)), 1), 0);
-      emit_label_after (braf_label, prev);
+      emit_label_after (as_a <rtx_insn *> (braf_label), prev);
 
       /* Fix up the ADDR_DIF_VEC to be relative
 	 to the reference address of the braf.  */
@@ -5810,7 +5816,7 @@ barrier_align (rtx_insn *barrier_or_label)
 	{
 	  rtx_insn *x;
 	  if (jump_to_next
-	      || next_real_insn (JUMP_LABEL (prev)) == next
+	      || next_real_insn (JUMP_LABEL_AS_INSN (prev)) == next
 	      /* If relax_delay_slots() decides NEXT was redundant
 		 with some previous instruction, it will have
 		 redirected PREV's jump to the following insn.  */
@@ -6310,7 +6316,7 @@ sh_reorg (void)
 
 /* Return the UID of the insn that follows the specified label.  */
 int
-get_dest_uid (rtx label, int max_uid)
+get_dest_uid (rtx_insn *label, int max_uid)
 {
   rtx_insn *dest = next_real_insn (label);
 
@@ -6370,7 +6376,7 @@ split_branches (rtx_insn *first)
 	    if (get_attr_length (insn) > 4)
 	      {
 		rtx src = SET_SRC (PATTERN (insn));
-		rtx olabel = XEXP (XEXP (src, 1), 0);
+		rtx_insn *olabel = safe_as_a <rtx_insn *> (XEXP (XEXP (src, 1), 0));
 		int addr = INSN_ADDRESSES (INSN_UID (insn));
 		rtx_insn *label = 0;
 		int dest_uid = get_dest_uid (olabel, max_uid);

gcc/emit-rtl.c

@@ -3602,10 +3602,8 @@ prev_nonnote_nondebug_insn_bb (rtx_insn *insn)
    SEQUENCEs.  */
 
 rtx_insn *
-next_real_insn (rtx uncast_insn)
+next_real_insn (rtx_insn *insn)
 {
-  rtx_insn *insn = safe_as_a <rtx_insn *> (uncast_insn);
-
   while (insn)
     {
       insn = NEXT_INSN (insn);
@@ -4230,10 +4228,8 @@ add_insn_before_nobb (rtx_insn *insn, rtx_insn *before)
    they know how to update a SEQUENCE. */
 
 void
-add_insn_after (rtx uncast_insn, rtx uncast_after, basic_block bb)
+add_insn_after (rtx_insn *insn, rtx_insn *after, basic_block bb)
 {
-  rtx_insn *insn = as_a <rtx_insn *> (uncast_insn);
-  rtx_insn *after = as_a <rtx_insn *> (uncast_after);
   add_insn_after_nobb (insn, after);
   if (!BARRIER_P (after)
       && !BARRIER_P (insn)
@@ -4260,10 +4256,8 @@ add_insn_after (rtx uncast_insn, rtx uncast_after, basic_block bb)
    they know how to update a SEQUENCE. */
 
 void
-add_insn_before (rtx uncast_insn, rtx uncast_before, basic_block bb)
+add_insn_before (rtx_insn *insn, rtx_insn *before, basic_block bb)
 {
-  rtx_insn *insn = as_a <rtx_insn *> (uncast_insn);
-  rtx_insn *before = as_a <rtx_insn *> (uncast_before);
   add_insn_before_nobb (insn, before);
 
   if (!bb
@@ -4313,9 +4307,8 @@ set_insn_deleted (rtx insn)
    To really delete an insn and related DF information, use delete_insn.  */
 
 void
-remove_insn (rtx uncast_insn)
+remove_insn (rtx_insn *insn)
 {
-  rtx_insn *insn = as_a <rtx_insn *> (uncast_insn);
   rtx_insn *next = NEXT_INSN (insn);
   rtx_insn *prev = PREV_INSN (insn);
   basic_block bb;
@@ -4518,7 +4511,8 @@ reorder_insns (rtx_insn *from, rtx_insn *to, rtx_insn *after)
    generated would almost certainly die right after it was created.  */
 
 static rtx_insn *
-emit_pattern_before_noloc (rtx x, rtx before, rtx last, basic_block bb,
+emit_pattern_before_noloc (rtx x, rtx_insn *before, rtx_insn *last,
+			   basic_block bb,
                            rtx_insn *(*make_raw) (rtx))
 {
   rtx_insn *insn;
@@ -4526,7 +4520,7 @@ emit_pattern_before_noloc (rtx x, rtx before, rtx last, basic_block bb,
   gcc_assert (before);
 
   if (x == NULL_RTX)
-    return safe_as_a <rtx_insn *> (last);
+    return last;
 
   switch (GET_CODE (x))
     {
@@ -4559,7 +4553,7 @@ emit_pattern_before_noloc (rtx x, rtx before, rtx last, basic_block bb,
       break;
     }
 
-  return safe_as_a <rtx_insn *> (last);
+  return last;
 }
 
 /* Make X be output before the instruction BEFORE.  */
@@ -4577,7 +4571,7 @@ rtx_jump_insn *
 emit_jump_insn_before_noloc (rtx x, rtx_insn *before)
 {
   return as_a <rtx_jump_insn *> (
-		emit_pattern_before_noloc (x, before, NULL_RTX, NULL,
+		emit_pattern_before_noloc (x, before, NULL, NULL,
 					   make_jump_insn_raw));
 }
 
@@ -4587,7 +4581,7 @@ emit_jump_insn_before_noloc (rtx x, rtx_insn *before)
 rtx_insn *
 emit_call_insn_before_noloc (rtx x, rtx_insn *before)
 {
-  return emit_pattern_before_noloc (x, before, NULL_RTX, NULL,
+  return emit_pattern_before_noloc (x, before, NULL, NULL,
 				    make_call_insn_raw);
 }
 
@@ -4595,9 +4589,9 @@ emit_call_insn_before_noloc (rtx x, rtx_insn *before)
    and output it before the instruction BEFORE.  */
 
 rtx_insn *
-emit_debug_insn_before_noloc (rtx x, rtx before)
+emit_debug_insn_before_noloc (rtx x, rtx_insn *before)
 {
-  return emit_pattern_before_noloc (x, before, NULL_RTX, NULL,
+  return emit_pattern_before_noloc (x, before, NULL, NULL,
 				    make_debug_insn_raw);
 }
 
@@ -4605,7 +4599,7 @@ emit_debug_insn_before_noloc (rtx x, rtx before)
    and output it before the insn BEFORE.  */
 
 rtx_barrier *
-emit_barrier_before (rtx before)
+emit_barrier_before (rtx_insn *before)
 {
   rtx_barrier *insn = as_a <rtx_barrier *> (rtx_alloc (BARRIER));
 
@@ -4618,21 +4612,20 @@ emit_barrier_before (rtx before)
 /* Emit the label LABEL before the insn BEFORE.  */
 
 rtx_code_label *
-emit_label_before (rtx label, rtx_insn *before)
+emit_label_before (rtx_code_label *label, rtx_insn *before)
 {
   gcc_checking_assert (INSN_UID (label) == 0);
   INSN_UID (label) = cur_insn_uid++;
   add_insn_before (label, before, NULL);
-  return as_a <rtx_code_label *> (label);
+  return label;
 }
 
 /* Helper for emit_insn_after, handles lists of instructions
    efficiently.  */
 
 static rtx_insn *
-emit_insn_after_1 (rtx_insn *first, rtx uncast_after, basic_block bb)
+emit_insn_after_1 (rtx_insn *first, rtx_insn *after, basic_block bb)
 {
-  rtx_insn *after = safe_as_a <rtx_insn *> (uncast_after);
   rtx_insn *last;
   rtx_insn *after_after;
   if (!bb && !BARRIER_P (after))
@@ -4674,10 +4667,9 @@ emit_insn_after_1 (rtx_insn *first, rtx uncast_after, basic_block bb)
 }
 
 static rtx_insn *
-emit_pattern_after_noloc (rtx x, rtx uncast_after, basic_block bb,
+emit_pattern_after_noloc (rtx x, rtx_insn *after, basic_block bb,
 			  rtx_insn *(*make_raw)(rtx))
 {
-  rtx_insn *after = safe_as_a <rtx_insn *> (uncast_after);
   rtx_insn *last = after;
 
   gcc_assert (after);
@@ -4716,7 +4708,7 @@ emit_pattern_after_noloc (rtx x, rtx uncast_after, basic_block bb,
    BB is NULL, an attempt is made to infer the BB from AFTER.  */
 
 rtx_insn *
-emit_insn_after_noloc (rtx x, rtx after, basic_block bb)
+emit_insn_after_noloc (rtx x, rtx_insn *after, basic_block bb)
 {
   return emit_pattern_after_noloc (x, after, bb, make_insn_raw);
 }
@@ -4726,7 +4718,7 @@ emit_insn_after_noloc (rtx x, rtx after, basic_block bb)
    and output it after the insn AFTER.  */
 
 rtx_jump_insn *
-emit_jump_insn_after_noloc (rtx x, rtx after)
+emit_jump_insn_after_noloc (rtx x, rtx_insn *after)
 {
   return as_a <rtx_jump_insn *> (
 		emit_pattern_after_noloc (x, after, NULL, make_jump_insn_raw));
@@ -4736,7 +4728,7 @@ emit_jump_insn_after_noloc (rtx x, rtx after)
    and output it after the instruction AFTER.  */
 
 rtx_insn *
-emit_call_insn_after_noloc (rtx x, rtx after)
+emit_call_insn_after_noloc (rtx x, rtx_insn *after)
 {
   return emit_pattern_after_noloc (x, after, NULL, make_call_insn_raw);
 }
@@ -4745,7 +4737,7 @@ emit_call_insn_after_noloc (rtx x, rtx after)
    and output it after the instruction AFTER.  */
 
 rtx_insn *
-emit_debug_insn_after_noloc (rtx x, rtx after)
+emit_debug_insn_after_noloc (rtx x, rtx_insn *after)
 {
   return emit_pattern_after_noloc (x, after, NULL, make_debug_insn_raw);
 }
@@ -4754,7 +4746,7 @@ emit_debug_insn_after_noloc (rtx x, rtx after)
    and output it after the insn AFTER.  */
 
 rtx_barrier *
-emit_barrier_after (rtx after)
+emit_barrier_after (rtx_insn *after)
 {
   rtx_barrier *insn = as_a <rtx_barrier *> (rtx_alloc (BARRIER));
 
@@ -4767,12 +4759,12 @@ emit_barrier_after (rtx after)
 /* Emit the label LABEL after the insn AFTER.  */
 
 rtx_insn *
-emit_label_after (rtx label, rtx_insn *after)
+emit_label_after (rtx_insn *label, rtx_insn *after)
 {
   gcc_checking_assert (INSN_UID (label) == 0);
   INSN_UID (label) = cur_insn_uid++;
   add_insn_after (label, after, NULL);
-  return as_a <rtx_insn *> (label);
+  return label;
 }
 
 /* Notes require a bit of special handling: Some notes need to have their
@@ -4842,10 +4834,9 @@ emit_note_before (enum insn_note subtype, rtx_insn *before)
    MAKE_RAW indicates how to turn PATTERN into a real insn.  */
 
 static rtx_insn *
-emit_pattern_after_setloc (rtx pattern, rtx uncast_after, int loc,
+emit_pattern_after_setloc (rtx pattern, rtx_insn *after, location_t loc,
 			   rtx_insn *(*make_raw) (rtx))
 {
-  rtx_insn *after = safe_as_a <rtx_insn *> (uncast_after);
   rtx_insn *last = emit_pattern_after_noloc (pattern, after, NULL, make_raw);
 
   if (pattern == NULL_RTX || !loc)
@@ -4889,7 +4880,7 @@ emit_pattern_after (rtx pattern, rtx uncast_after, bool skip_debug_insns,
 
 /* Like emit_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_insn *
-emit_insn_after_setloc (rtx pattern, rtx after, int loc)
+emit_insn_after_setloc (rtx pattern, rtx_insn *after, location_t loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_insn_raw);
 }
@@ -4903,7 +4894,7 @@ emit_insn_after (rtx pattern, rtx after)
 
 /* Like emit_jump_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_jump_insn *
-emit_jump_insn_after_setloc (rtx pattern, rtx after, int loc)
+emit_jump_insn_after_setloc (rtx pattern, rtx_insn *after, location_t loc)
 {
   return as_a <rtx_jump_insn *> (
 	emit_pattern_after_setloc (pattern, after, loc, make_jump_insn_raw));
@@ -4919,7 +4910,7 @@ emit_jump_insn_after (rtx pattern, rtx after)
 
 /* Like emit_call_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_insn *
-emit_call_insn_after_setloc (rtx pattern, rtx after, int loc)
+emit_call_insn_after_setloc (rtx pattern, rtx_insn *after, location_t loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_call_insn_raw);
 }
@@ -4933,7 +4924,7 @@ emit_call_insn_after (rtx pattern, rtx after)
 
 /* Like emit_debug_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_insn *
-emit_debug_insn_after_setloc (rtx pattern, rtx after, int loc)
+emit_debug_insn_after_setloc (rtx pattern, rtx_insn *after, location_t loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_debug_insn_raw);
 }
@@ -4951,13 +4942,12 @@ emit_debug_insn_after (rtx pattern, rtx after)
    CALL_INSN, etc.  */
 
 static rtx_insn *
-emit_pattern_before_setloc (rtx pattern, rtx uncast_before, int loc, bool insnp,
-			    rtx_insn *(*make_raw) (rtx))
+emit_pattern_before_setloc (rtx pattern, rtx_insn *before, location_t loc,
+			    bool insnp, rtx_insn *(*make_raw) (rtx))
 {
-  rtx_insn *before = as_a <rtx_insn *> (uncast_before);
   rtx_insn *first = PREV_INSN (before);
   rtx_insn *last = emit_pattern_before_noloc (pattern, before,
-					      insnp ? before : NULL_RTX,
+					      insnp ? before : NULL,
 					      NULL, make_raw);
 
   if (pattern == NULL_RTX || !loc)
@@ -5001,13 +4991,13 @@ emit_pattern_before (rtx pattern, rtx uncast_before, bool skip_debug_insns,
 				       insnp, make_raw);
   else
     return emit_pattern_before_noloc (pattern, before,
-				      insnp ? before : NULL_RTX,
+				      insnp ? before : NULL,
                                       NULL, make_raw);
 }
 
 /* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_insn *
-emit_insn_before_setloc (rtx pattern, rtx_insn *before, int loc)
+emit_insn_before_setloc (rtx pattern, rtx_insn *before, location_t loc)
 {
   return emit_pattern_before_setloc (pattern, before, loc, true,
 				     make_insn_raw);
@@ -5022,7 +5012,7 @@ emit_insn_before (rtx pattern, rtx before)
 
 /* like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_jump_insn *
-emit_jump_insn_before_setloc (rtx pattern, rtx_insn *before, int loc)
+emit_jump_insn_before_setloc (rtx pattern, rtx_insn *before, location_t loc)
 {
   return as_a <rtx_jump_insn *> (
 	emit_pattern_before_setloc (pattern, before, loc, false,
@@ -5040,7 +5030,7 @@ emit_jump_insn_before (rtx pattern, rtx before)
 
 /* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_insn *
-emit_call_insn_before_setloc (rtx pattern, rtx_insn *before, int loc)
+emit_call_insn_before_setloc (rtx pattern, rtx_insn *before, location_t loc)
 {
   return emit_pattern_before_setloc (pattern, before, loc, false,
 				     make_call_insn_raw);
@@ -5057,7 +5047,7 @@ emit_call_insn_before (rtx pattern, rtx_insn *before)
 
 /* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx_insn *
-emit_debug_insn_before_setloc (rtx pattern, rtx before, int loc)
+emit_debug_insn_before_setloc (rtx pattern, rtx_insn *before, location_t loc)
 {
   return emit_pattern_before_setloc (pattern, before, loc, false,
 				     make_debug_insn_raw);

gcc/rtl.h

@@ -3216,33 +3216,34 @@ extern void decide_function_section (tree);
 /* In emit-rtl.c */
 extern rtx_insn *emit_insn_before (rtx, rtx);
 extern rtx_insn *emit_insn_before_noloc (rtx, rtx_insn *, basic_block);
-extern rtx_insn *emit_insn_before_setloc (rtx, rtx_insn *, int);
+extern rtx_insn *emit_insn_before_setloc (rtx, rtx_insn *, location_t);
 extern rtx_jump_insn *emit_jump_insn_before (rtx, rtx);
 extern rtx_jump_insn *emit_jump_insn_before_noloc (rtx, rtx_insn *);
-extern rtx_jump_insn *emit_jump_insn_before_setloc (rtx, rtx_insn *, int);
+extern rtx_jump_insn *emit_jump_insn_before_setloc (rtx, rtx_insn *,
+						    location_t);
 extern rtx_insn *emit_call_insn_before (rtx, rtx_insn *);
 extern rtx_insn *emit_call_insn_before_noloc (rtx, rtx_insn *);
-extern rtx_insn *emit_call_insn_before_setloc (rtx, rtx_insn *, int);
+extern rtx_insn *emit_call_insn_before_setloc (rtx, rtx_insn *, location_t);
 extern rtx_insn *emit_debug_insn_before (rtx, rtx_insn *);
 extern rtx_insn *emit_debug_insn_before_noloc (rtx, rtx);
-extern rtx_insn *emit_debug_insn_before_setloc (rtx, rtx, int);
-extern rtx_barrier *emit_barrier_before (rtx);
-extern rtx_code_label *emit_label_before (rtx, rtx_insn *);
+extern rtx_insn *emit_debug_insn_before_setloc (rtx, rtx_insn *, location_t);
+extern rtx_barrier *emit_barrier_before (rtx_insn *);
+extern rtx_code_label *emit_label_before (rtx_code_label *, rtx_insn *);
 extern rtx_note *emit_note_before (enum insn_note, rtx_insn *);
 extern rtx_insn *emit_insn_after (rtx, rtx);
-extern rtx_insn *emit_insn_after_noloc (rtx, rtx, basic_block);
-extern rtx_insn *emit_insn_after_setloc (rtx, rtx, int);
+extern rtx_insn *emit_insn_after_noloc (rtx, rtx_insn *, basic_block);
+extern rtx_insn *emit_insn_after_setloc (rtx, rtx_insn *, location_t);
 extern rtx_jump_insn *emit_jump_insn_after (rtx, rtx);
-extern rtx_jump_insn *emit_jump_insn_after_noloc (rtx, rtx);
-extern rtx_jump_insn *emit_jump_insn_after_setloc (rtx, rtx, int);
+extern rtx_jump_insn *emit_jump_insn_after_noloc (rtx, rtx_insn *);
+extern rtx_jump_insn *emit_jump_insn_after_setloc (rtx, rtx_insn *, location_t);
 extern rtx_insn *emit_call_insn_after (rtx, rtx);
-extern rtx_insn *emit_call_insn_after_noloc (rtx, rtx);
-extern rtx_insn *emit_call_insn_after_setloc (rtx, rtx, int);
+extern rtx_insn *emit_call_insn_after_noloc (rtx, rtx_insn *);
+extern rtx_insn *emit_call_insn_after_setloc (rtx, rtx_insn *, location_t);
 extern rtx_insn *emit_debug_insn_after (rtx, rtx);
-extern rtx_insn *emit_debug_insn_after_noloc (rtx, rtx);
-extern rtx_insn *emit_debug_insn_after_setloc (rtx, rtx, int);
-extern rtx_barrier *emit_barrier_after (rtx);
-extern rtx_insn *emit_label_after (rtx, rtx_insn *);
+extern rtx_insn *emit_debug_insn_after_noloc (rtx, rtx_insn *);
+extern rtx_insn *emit_debug_insn_after_setloc (rtx, rtx_insn *, location_t);
+extern rtx_barrier *emit_barrier_after (rtx_insn *);
+extern rtx_insn *emit_label_after (rtx_insn *, rtx_insn *);
 extern rtx_note *emit_note_after (enum insn_note, rtx_insn *);
 extern rtx_insn *emit_insn (rtx);
 extern rtx_insn *emit_debug_insn (rtx);
@@ -3271,7 +3272,7 @@ extern rtx_insn *prev_nonnote_nondebug_insn_bb (rtx_insn *);
 extern rtx_insn *next_nonnote_nondebug_insn (rtx_insn *);
 extern rtx_insn *next_nonnote_nondebug_insn_bb (rtx_insn *);
 extern rtx_insn *prev_real_insn (rtx_insn *);
-extern rtx_insn *next_real_insn (rtx);
+extern rtx_insn *next_real_insn (rtx_insn *);
 extern rtx_insn *prev_real_nondebug_insn (rtx_insn *);
 extern rtx_insn *next_real_nondebug_insn (rtx);
 extern rtx_insn *prev_active_insn (rtx_insn *);
@@ -3963,9 +3964,9 @@ extern void unshare_all_rtl_again (rtx_insn *);
 extern void unshare_all_rtl_in_chain (rtx_insn *);
 extern void verify_rtl_sharing (void);
 extern void add_insn (rtx_insn *);
-extern void add_insn_before (rtx, rtx, basic_block);
-extern void add_insn_after (rtx, rtx, basic_block);
-extern void remove_insn (rtx);
+extern void add_insn_before (rtx_insn *, rtx_insn *, basic_block);
+extern void add_insn_after (rtx_insn *, rtx_insn *, basic_block);
+extern void remove_insn (rtx_insn *);
 extern rtx_insn *emit (rtx, bool = true);
 extern void emit_insn_at_entry (rtx);
 extern rtx gen_lowpart_SUBREG (machine_mode, rtx);