From 036620db8a9f9e4d807de8ba07a7004aa02a9941 Mon Sep 17 00:00:00 2001
From: Richard Sandiford <richard.sandiford@linaro.org>
Date: Tue, 12 Sep 2017 13:28:18 +0000
Subject: Make more use of END_REGNO

An upcoming patch will convert hard_regno_nregs into an inline
function, which in turn allows hard_regno_nregs to be used as the
name of a targetm field.  This patch rewrites uses that are more
easily (and efficiently) written as END_REGNO.

2017-09-12  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* config/frv/frv.c (FOR_EACH_REGNO): Use END_REGNO instead of
	hard_regno_nregs.
	* config/v850/v850.c (v850_reorg): Likewise.
	* reload.c (refers_to_regno_for_reload_p): Likewise.
	(find_equiv_reg): Likewise.
	* reload1.c (reload_reg_reaches_end_p): Likewise.

From-SVN: r252011
---
 gcc/reload.c | 46 +++++++++++++++-------------------------------
 1 file changed, 15 insertions(+), 31 deletions(-)

(limited to 'gcc/reload.c')

diff --git a/gcc/reload.c b/gcc/reload.c
index eb67db6..21efdcb 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -6439,10 +6439,7 @@ refers_to_regno_for_reload_p (unsigned int regno, unsigned int endregno,
 	  return 0;
 	}
 
-      return (endregno > r
-	      && regno < r + (r < FIRST_PSEUDO_REGISTER
-			      ? hard_regno_nregs[r][GET_MODE (x)]
-			      : 1));
+      return endregno > r && regno < END_REGNO (x);
 
     case SUBREG:
       /* If this is a SUBREG of a hard reg, we can see exactly which
@@ -6889,15 +6886,11 @@ find_equiv_reg (rtx goal, rtx_insn *insn, enum reg_class rclass, int other,
     {
       int i;
       for (i = 0; i < n_reloads; i++)
-	if (rld[i].reg_rtx != 0 && rld[i].in)
-	  {
-	    int regno1 = REGNO (rld[i].reg_rtx);
-	    int nregs1 = hard_regno_nregs[regno1]
-					 [GET_MODE (rld[i].reg_rtx)];
-	    if (regno1 < valueno + valuenregs
-		&& regno1 + nregs1 > valueno)
-	      return 0;
-	  }
+	if (rld[i].reg_rtx != 0
+	    && rld[i].in
+	    && (int) REGNO (rld[i].reg_rtx) < valueno + valuenregs
+	    && (int) END_REGNO (rld[i].reg_rtx) > valueno)
+	  return 0;
     }
 
   if (goal_mem)
@@ -6963,15 +6956,11 @@ find_equiv_reg (rtx goal, rtx_insn *insn, enum reg_class rclass, int other,
 	      if (REG_P (dest))
 		{
 		  int xregno = REGNO (dest);
-		  int xnregs;
-		  if (REGNO (dest) < FIRST_PSEUDO_REGISTER)
-		    xnregs = hard_regno_nregs[xregno][GET_MODE (dest)];
-		  else
-		    xnregs = 1;
-		  if (xregno < regno + nregs && xregno + xnregs > regno)
+		  int end_xregno = END_REGNO (dest);
+		  if (xregno < regno + nregs && end_xregno > regno)
 		    return 0;
 		  if (xregno < valueno + valuenregs
-		      && xregno + xnregs > valueno)
+		      && end_xregno > valueno)
 		    return 0;
 		  if (goal_mem_addr_varies
 		      && reg_overlap_mentioned_for_reload_p (dest, goal))
@@ -7006,16 +6995,12 @@ find_equiv_reg (rtx goal, rtx_insn *insn, enum reg_class rclass, int other,
 		      if (REG_P (dest))
 			{
 			  int xregno = REGNO (dest);
-			  int xnregs;
-			  if (REGNO (dest) < FIRST_PSEUDO_REGISTER)
-			    xnregs = hard_regno_nregs[xregno][GET_MODE (dest)];
-			  else
-			    xnregs = 1;
+			  int end_xregno = END_REGNO (dest);
 			  if (xregno < regno + nregs
-			      && xregno + xnregs > regno)
+			      && end_xregno > regno)
 			    return 0;
 			  if (xregno < valueno + valuenregs
-			      && xregno + xnregs > valueno)
+			      && end_xregno > valueno)
 			    return 0;
 			  if (goal_mem_addr_varies
 			      && reg_overlap_mentioned_for_reload_p (dest,
@@ -7052,14 +7037,13 @@ find_equiv_reg (rtx goal, rtx_insn *insn, enum reg_class rclass, int other,
 		      if (REG_P (dest))
 			{
 			  int xregno = REGNO (dest);
-			  int xnregs
-			    = hard_regno_nregs[xregno][GET_MODE (dest)];
+			  int end_xregno = END_REGNO (dest);
 
 			  if (xregno < regno + nregs
-			      && xregno + xnregs > regno)
+			      && end_xregno > regno)
 			    return 0;
 			  else if (xregno < valueno + valuenregs
-				   && xregno + xnregs > valueno)
+				   && end_xregno > valueno)
 			    return 0;
 			  else if (goal_mem_addr_varies
 				   && reg_overlap_mentioned_for_reload_p (dest,
-- 
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