Make more use of REG_NREGS

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 REG_NREGS.

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

gcc/
	* caller-save.c (add_used_regs): Use REG_NREGS instead of
	hard_regno_nregs.
	* config/aarch64/aarch64.c (aarch64_split_combinev16qi): Likewise.
	* config/arm/arm.c (output_move_neon): Likewise.
	(arm_attr_length_move_neon): Likewise.
	(neon_split_vcombine): Likewise.
	* config/c6x/c6x.c (c6x_mark_reg_read): Likewise.
	(c6x_mark_reg_written): Likewise.
	(c6x_dwarf_register_span): Likewise.
	* config/i386/i386.c (ix86_save_reg): Likewise.
	* config/ia64/ia64.c (mark_reg_gr_used_mask): Likewise.
	(rws_access_reg): Likewise.
	* config/s390/s390.c (s390_call_saved_register_used): Likewise.
	* mode-switching.c (create_pre_exit): Likewise.
	* ree.c (combine_reaching_defs): Likewise.
	(add_removable_extension): Likewise.
	* regcprop.c (find_oldest_value_reg): Likewise.
	(copyprop_hardreg_forward_1): Likewise.
	* reload.c (reload_inner_reg_of_subreg): Likewise.
	(push_reload): Likewise.
	(combine_reloads): Likewise.
	(find_dummy_reload): Likewise.
	(reload_adjust_reg_for_mode): Likewise.
	* reload1.c (find_reload_regs): Likewise.
	(forget_old_reloads_1): Likewise.
	(reload_reg_free_for_value_p): Likewise.
	(reload_adjust_reg_for_temp): Likewise.
	(emit_reload_insns): Likewise.
	(delete_output_reload): Likewise.
	* sel-sched.c (choose_best_reg_1): Likewise.
	(choose_best_pseudo_reg): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@252010 138bc75d-0d04-0410-961f-82ee72b054a4

14 files changed, 73 insertions, 61 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ce59e7a2ba9..2683d7759d0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,38 @@
 2017-09-12  Richard Sandiford  <richard.sandiford@linaro.org>
+
+	* caller-save.c (add_used_regs): Use REG_NREGS instead of
+	hard_regno_nregs.
+	* config/aarch64/aarch64.c (aarch64_split_combinev16qi): Likewise.
+	* config/arm/arm.c (output_move_neon): Likewise.
+	(arm_attr_length_move_neon): Likewise.
+	(neon_split_vcombine): Likewise.
+	* config/c6x/c6x.c (c6x_mark_reg_read): Likewise.
+	(c6x_mark_reg_written): Likewise.
+	(c6x_dwarf_register_span): Likewise.
+	* config/i386/i386.c (ix86_save_reg): Likewise.
+	* config/ia64/ia64.c (mark_reg_gr_used_mask): Likewise.
+	(rws_access_reg): Likewise.
+	* config/s390/s390.c (s390_call_saved_register_used): Likewise.
+	* mode-switching.c (create_pre_exit): Likewise.
+	* ree.c (combine_reaching_defs): Likewise.
+	(add_removable_extension): Likewise.
+	* regcprop.c (find_oldest_value_reg): Likewise.
+	(copyprop_hardreg_forward_1): Likewise.
+	* reload.c (reload_inner_reg_of_subreg): Likewise.
+	(push_reload): Likewise.
+	(combine_reloads): Likewise.
+	(find_dummy_reload): Likewise.
+	(reload_adjust_reg_for_mode): Likewise.
+	* reload1.c (find_reload_regs): Likewise.
+	(forget_old_reloads_1): Likewise.
+	(reload_reg_free_for_value_p): Likewise.
+	(reload_adjust_reg_for_temp): Likewise.
+	(emit_reload_insns): Likewise.
+	(delete_output_reload): Likewise.
+	* sel-sched.c (choose_best_reg_1): Likewise.
+	(choose_best_pseudo_reg): Likewise.
+
+2017-09-12  Richard Sandiford  <richard.sandiford@linaro.org>
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood <david.sherwood@arm.com>
 
diff --git a/gcc/caller-save.c b/gcc/caller-save.c
index 619dac9a689..2166dcf5b89 100644
--- a/gcc/caller-save.c
+++ b/gcc/caller-save.c
@@ -1354,8 +1354,7 @@ add_used_regs (rtx *loc, void *data)
 	{
 	  unsigned int regno = REGNO (x);
 	  if (HARD_REGISTER_NUM_P (regno))
-	    bitmap_set_range ((regset) data, regno,
-			      hard_regno_nregs[regno][GET_MODE (x)]);
+	    bitmap_set_range ((regset) data, regno, REG_NREGS (x));
 	  else
 	    gcc_checking_assert (reg_renumber[regno] < 0);
 	}
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index a2ecd7ac336..64c03da63a7 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -13106,7 +13106,7 @@ aarch64_split_combinev16qi (rtx operands[3])
   unsigned int src1 = REGNO (operands[1]);
   unsigned int src2 = REGNO (operands[2]);
   machine_mode halfmode = GET_MODE (operands[1]);
-  unsigned int halfregs = HARD_REGNO_NREGS (src1, halfmode);
+  unsigned int halfregs = REG_NREGS (operands[1]);
   rtx destlo, desthi;
 
   gcc_assert (halfmode == V16QImode);
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index f0e7788a53f..7614bc1f86b 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -18589,7 +18589,7 @@ output_move_neon (rtx *operands)
 
   gcc_assert (REG_P (reg));
   regno = REGNO (reg);
-  nregs = HARD_REGNO_NREGS (regno, mode) / 2;
+  nregs = REG_NREGS (reg) / 2;
   gcc_assert (VFP_REGNO_OK_FOR_DOUBLE (regno)
 	      || NEON_REGNO_OK_FOR_QUAD (regno));
   gcc_assert (VALID_NEON_DREG_MODE (mode)
@@ -18722,7 +18722,6 @@ arm_attr_length_move_neon (rtx_insn *insn)
 
   gcc_assert (MEM_P (mem));
 
-  mode = GET_MODE (reg);
   addr = XEXP (mem, 0);
 
   /* Strip off const from addresses like (const (plus (...))).  */
@@ -18731,7 +18730,7 @@ arm_attr_length_move_neon (rtx_insn *insn)
 
   if (GET_CODE (addr) == LABEL_REF || GET_CODE (addr) == PLUS)
     {
-      int insns = HARD_REGNO_NREGS (REGNO (reg), mode) / 2;
+      int insns = REG_NREGS (reg) / 2;
       return insns * 4;
     }
   else
@@ -23713,7 +23712,7 @@ neon_split_vcombine (rtx operands[3])
   unsigned int src1 = REGNO (operands[1]);
   unsigned int src2 = REGNO (operands[2]);
   machine_mode halfmode = GET_MODE (operands[1]);
-  unsigned int halfregs = HARD_REGNO_NREGS (src1, halfmode);
+  unsigned int halfregs = REG_NREGS (operands[1]);
   rtx destlo, desthi;
 
   if (src1 == dest && src2 == dest + halfregs)
diff --git a/gcc/config/c6x/c6x.c b/gcc/config/c6x/c6x.c
index c5b1679c547..e7f68414328 100644
--- a/gcc/config/c6x/c6x.c
+++ b/gcc/config/c6x/c6x.c
@@ -4025,7 +4025,7 @@ static void
 c6x_mark_reg_read (rtx reg, bool cross)
 {
   unsigned regno = REGNO (reg);
-  unsigned nregs = hard_regno_nregs[regno][GET_MODE (reg)];
+  unsigned nregs = REG_NREGS (reg);
 
   while (nregs-- > 0)
     c6x_mark_regno_read (regno + nregs, cross);
@@ -4037,7 +4037,7 @@ static void
 c6x_mark_reg_written (rtx reg, int cycles)
 {
   unsigned regno = REGNO (reg);
-  unsigned nregs = hard_regno_nregs[regno][GET_MODE (reg)];
+  unsigned nregs = REG_NREGS (reg);
 
   while (nregs-- > 0)
     ss.reg_set_in_cycle[regno + nregs] = cycles;
@@ -6336,7 +6336,7 @@ c6x_dwarf_register_span (rtx rtl)
     rtx p;
 
     regno = REGNO (rtl);
-    nregs = HARD_REGNO_NREGS (regno, GET_MODE (rtl));
+    nregs = REG_NREGS (rtl);
     if (nregs == 1)
       return  NULL_RTX;
 
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 4e93cc1043b..61bca2acb30 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -12719,7 +12719,7 @@ ix86_save_reg (unsigned int regno, bool maybe_eh_return, bool ignore_outlined)
       if (reg)
 	{
 	  unsigned int i = REGNO (reg);
-	  unsigned int nregs = hard_regno_nregs[i][GET_MODE (reg)];
+	  unsigned int nregs = REG_NREGS (reg);
 	  while (nregs-- > 0)
 	    if ((i + nregs) == regno)
 	      return false;
@@ -12728,7 +12728,7 @@ ix86_save_reg (unsigned int regno, bool maybe_eh_return, bool ignore_outlined)
 	  if (reg)
 	    {
 	      i = REGNO (reg);
-	      nregs = hard_regno_nregs[i][GET_MODE (reg)];
+	      nregs = REG_NREGS (reg);
 	      while (nregs-- > 0)
 		if ((i + nregs) == regno)
 		  return false;
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index 8a3c875cd06..426287081ae 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -2653,7 +2653,7 @@ mark_reg_gr_used_mask (rtx reg, void *data ATTRIBUTE_UNUSED)
   unsigned int regno = REGNO (reg);
   if (regno < 32)
     {
-      unsigned int i, n = hard_regno_nregs[regno][GET_MODE (reg)];
+      unsigned int i, n = REG_NREGS (reg);
       for (i = 0; i < n; ++i)
 	current_frame_info.gr_used_mask |= 1 << (regno + i);
     }
@@ -6399,7 +6399,7 @@ static int
 rws_access_reg (rtx reg, struct reg_flags flags, int pred)
 {
   int regno = REGNO (reg);
-  int n = HARD_REGNO_NREGS (REGNO (reg), GET_MODE (reg));
+  int n = REG_NREGS (reg);
 
   if (n == 1)
     return rws_access_regno (regno, flags, pred);
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 36bc67db1da..de7f3e577d0 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -13241,9 +13241,7 @@ s390_call_saved_register_used (tree call_expr)
 
        if (REG_P (parm_rtx))
   	 {
-	   for (reg = 0;
-		reg < HARD_REGNO_NREGS (REGNO (parm_rtx), GET_MODE (parm_rtx));
-		reg++)
+	   for (reg = 0; reg < REG_NREGS (parm_rtx); reg++)
 	     if (!call_used_regs[reg + REGNO (parm_rtx)])
  	       return true;
 	 }
@@ -13258,9 +13256,7 @@ s390_call_saved_register_used (tree call_expr)
 
 	       gcc_assert (REG_P (r));
 
-	       for (reg = 0;
-		    reg < HARD_REGNO_NREGS (REGNO (r), GET_MODE (r));
-		    reg++)
+	       for (reg = 0; reg < REG_NREGS (r); reg++)
 		 if (!call_used_regs[reg + REGNO (r)])
 		   return true;
 	     }
diff --git a/gcc/mode-switching.c b/gcc/mode-switching.c
index 15b813ff6f7..59e88888b1c 100644
--- a/gcc/mode-switching.c
+++ b/gcc/mode-switching.c
@@ -440,8 +440,7 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
 			|| short_block
 			|| !(targetm.class_likely_spilled_p
 			     (REGNO_REG_CLASS (ret_start)))
-			|| (nregs
-			    != hard_regno_nregs[ret_start][GET_MODE (ret_reg)])
+			|| nregs != REG_NREGS (ret_reg)
 			/* For multi-hard-register floating point
 		   	   values, sometimes the likely-spilled part
 		   	   is ordinarily copied first, then the other
diff --git a/gcc/ree.c b/gcc/ree.c
index 72564de98af..9e04954d35b 100644
--- a/gcc/ree.c
+++ b/gcc/ree.c
@@ -823,8 +823,7 @@ combine_reaching_defs (ext_cand *cand, const_rtx set_pat, ext_state *state)
 	return false;
 
       /* Ensure the number of hard registers of the copy match.  */
-      if (HARD_REGNO_NREGS (REGNO (src_reg), dst_mode)
-	  != HARD_REGNO_NREGS (REGNO (src_reg), GET_MODE (src_reg)))
+      if (HARD_REGNO_NREGS (REGNO (src_reg), dst_mode) != REG_NREGS (src_reg))
 	return false;
 
       /* There's only one reaching def.  */
@@ -1136,8 +1135,7 @@ add_removable_extension (const_rtx expr, rtx_insn *insn,
 
 	 We allow this when the registers are different because the
 	 code in combine_reaching_defs will handle that case correctly.  */
-      if ((HARD_REGNO_NREGS (REGNO (dest), mode)
-	   != HARD_REGNO_NREGS (REGNO (reg), GET_MODE (reg)))
+      if (HARD_REGNO_NREGS (REGNO (dest), mode) != REG_NREGS (reg)
 	  && reg_overlap_mentioned_p (dest, reg))
 	return;
 
diff --git a/gcc/regcprop.c b/gcc/regcprop.c
index 1161f157d8e..39977bec144 100644
--- a/gcc/regcprop.c
+++ b/gcc/regcprop.c
@@ -444,12 +444,9 @@ find_oldest_value_reg (enum reg_class cl, rtx reg, struct value_data *vd)
 	(set (reg:SI r10) (...))
 	(set (...) (reg:DI r9))
      Replacing r9 with r11 is invalid.  */
-  if (mode != vd->e[regno].mode)
-    {
-      if (hard_regno_nregs[regno][mode]
-	  > hard_regno_nregs[regno][vd->e[regno].mode])
-	return NULL_RTX;
-    }
+  if (mode != vd->e[regno].mode
+      && REG_NREGS (reg) > hard_regno_nregs[regno][vd->e[regno].mode])
+    return NULL_RTX;
 
   for (i = vd->e[regno].oldest_regno; i != regno; i = vd->e[i].next_regno)
     {
@@ -871,14 +868,13 @@ copyprop_hardreg_forward_1 (basic_block bb, struct value_data *vd)
 	     set it in, make sure that the replacement is valid.  */
 	  if (mode != vd->e[regno].mode)
 	    {
-	      if (hard_regno_nregs[regno][mode]
+	      if (REG_NREGS (src)
 		  > hard_regno_nregs[regno][vd->e[regno].mode])
 		goto no_move_special_case;
 
 	      /* And likewise, if we are narrowing on big endian the transformation
 		 is also invalid.  */
-	      if (hard_regno_nregs[regno][mode]
-		  < hard_regno_nregs[regno][vd->e[regno].mode]
+	      if (REG_NREGS (src) < hard_regno_nregs[regno][vd->e[regno].mode]
 		  && (GET_MODE_SIZE (vd->e[regno].mode) > UNITS_PER_WORD
 		      ? WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN))
 		goto no_move_special_case;
diff --git a/gcc/reload.c b/gcc/reload.c
index 9d96700209f..eb67db6c951 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -862,7 +862,7 @@ reload_inner_reg_of_subreg (rtx x, machine_mode mode, bool output)
 	  && GET_MODE_SIZE (mode) <= UNITS_PER_WORD
 	  && GET_MODE_SIZE (GET_MODE (inner)) > UNITS_PER_WORD
 	  && ((GET_MODE_SIZE (GET_MODE (inner)) / UNITS_PER_WORD)
-	      != (int) hard_regno_nregs[REGNO (inner)][GET_MODE (inner)]));
+	      != REG_NREGS (inner)));
 }
 
 /* Return nonzero if IN can be reloaded into REGNO with mode MODE without
@@ -1086,8 +1086,7 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
 		       > UNITS_PER_WORD)
 		   && ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (in)))
 			/ UNITS_PER_WORD)
-		       != (int) hard_regno_nregs[REGNO (SUBREG_REG (in))]
-						[GET_MODE (SUBREG_REG (in))]))
+		       != REG_NREGS (SUBREG_REG (in))))
 		  || !targetm.hard_regno_mode_ok (subreg_regno (in), inmode)))
 	  || (secondary_reload_class (1, rclass, inmode, in) != NO_REGS
 	      && (secondary_reload_class (1, rclass, GET_MODE (SUBREG_REG (in)),
@@ -1597,7 +1596,7 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
 	    && (ORIGINAL_REGNO (XEXP (note, 0)) < FIRST_PSEUDO_REGISTER
 		|| (! bitmap_bit_p (DF_LR_OUT (ENTRY_BLOCK_PTR_FOR_FN (cfun)),
 				    ORIGINAL_REGNO (XEXP (note, 0)))
-		    && hard_regno_nregs[regno][GET_MODE (XEXP (note, 0))] == 1))
+		    && REG_NREGS (XEXP (note, 0)) == 1))
 	    && ! refers_to_regno_for_reload_p (regno,
 					       end_hard_regno (rel_mode,
 							       regno),
@@ -1907,7 +1906,7 @@ combine_reloads (void)
 	&& TEST_HARD_REG_BIT (reg_class_contents[(int) rld[output_reload].rclass],
 			      regno)
 	&& (hard_regno_nregs[regno][rld[output_reload].outmode]
-	    <= hard_regno_nregs[regno][GET_MODE (XEXP (note, 0))])
+	    <= REG_NREGS (XEXP (note, 0)))
 	/* Ensure that a secondary or tertiary reload for this output
 	   won't want this register.  */
 	&& ((secondary_out = rld[output_reload].secondary_out_reload) == -1
@@ -1922,7 +1921,7 @@ combine_reloads (void)
 	&& (ORIGINAL_REGNO (XEXP (note, 0)) < FIRST_PSEUDO_REGISTER
 	    || (!bitmap_bit_p (DF_LR_OUT (ENTRY_BLOCK_PTR_FOR_FN (cfun)),
 			       ORIGINAL_REGNO (XEXP (note, 0)))
-		&& hard_regno_nregs[regno][GET_MODE (XEXP (note, 0))] == 1)))
+		&& REG_NREGS (XEXP (note, 0)) == 1)))
       {
 	rld[output_reload].reg_rtx
 	  = gen_rtx_REG (rld[output_reload].outmode, regno);
@@ -2088,7 +2087,7 @@ find_dummy_reload (rtx real_in, rtx real_out, rtx *inloc, rtx *outloc,
 		 because only another subword of the hardreg is actually
 		 used in the insn.  This cannot happen if the pseudo has
 		 been assigned exactly one hardreg.  See PR 33732.  */
-	      && hard_regno_nregs[REGNO (in)][GET_MODE (in)] == 1)))
+	      && REG_NREGS (in) == 1)))
     {
       unsigned int regno = REGNO (in) + in_offset;
       unsigned int nwords = hard_regno_nregs[regno][inmode];
@@ -7254,8 +7253,7 @@ reload_adjust_reg_for_mode (rtx reloadreg, machine_mode mode)
   regno = REGNO (reloadreg);
 
   if (REG_WORDS_BIG_ENDIAN)
-    regno += (int) hard_regno_nregs[regno][GET_MODE (reloadreg)]
-      - (int) hard_regno_nregs[regno][mode];
+    regno += (int) REG_NREGS (reloadreg) - (int) hard_regno_nregs[regno][mode];
 
   return gen_rtx_REG (mode, regno);
 }
diff --git a/gcc/reload1.c b/gcc/reload1.c
index 647a97bb958..092995138a6 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -1965,10 +1965,8 @@ find_reload_regs (struct insn_chain *chain)
       /* Show whether this reload already has a hard reg.  */
       if (chain->rld[i].reg_rtx)
 	{
-	  int regno = REGNO (chain->rld[i].reg_rtx);
-	  chain->rld[i].regno = regno;
-	  chain->rld[i].nregs
-	    = hard_regno_nregs[regno][GET_MODE (chain->rld[i].reg_rtx)];
+	  chain->rld[i].regno = REGNO (chain->rld[i].reg_rtx);
+	  chain->rld[i].nregs = REG_NREGS (chain->rld[i].reg_rtx);
 	}
       else
 	chain->rld[i].regno = -1;
@@ -4910,7 +4908,7 @@ forget_old_reloads_1 (rtx x, const_rtx ignored ATTRIBUTE_UNUSED,
     {
       unsigned int i;
 
-      nr = hard_regno_nregs[regno][GET_MODE (x)];
+      nr = REG_NREGS (x);
       /* Storing into a spilled-reg invalidates its contents.
 	 This can happen if a block-local pseudo is allocated to that reg
 	 and it wasn't spilled because this block's total need is 0.
@@ -5874,8 +5872,7 @@ reload_reg_free_for_value_p (int start_regno, int regno, int opnum,
     {
       rtx reg = rld[i].reg_rtx;
       if (reg && REG_P (reg)
-	  && ((unsigned) regno - true_regnum (reg)
-	      <= hard_regno_nregs[REGNO (reg)][GET_MODE (reg)] - (unsigned) 1)
+	  && (unsigned) regno - true_regnum (reg) < REG_NREGS (reg)
 	  && i != reloadnum)
 	{
 	  rtx other_input = rld[i].in;
@@ -7155,8 +7152,7 @@ reload_adjust_reg_for_temp (rtx *reload_reg, rtx alt_reload_reg,
 	{
 	  if (!targetm.hard_regno_mode_ok (regno, new_mode))
 	    continue;
-	  if (hard_regno_nregs[regno][new_mode]
-	      > hard_regno_nregs[regno][GET_MODE (reg)])
+	  if (hard_regno_nregs[regno][new_mode] > REG_NREGS (reg))
 	    continue;
 	  reg = reload_adjust_reg_for_mode (reg, new_mode);
 	}
@@ -8236,7 +8232,7 @@ emit_reload_insns (struct insn_chain *chain)
 		{
 		  machine_mode mode = GET_MODE (reg);
 		  int regno = REGNO (reg);
-		  int nregs = hard_regno_nregs[regno][mode];
+		  int nregs = REG_NREGS (reg);
 		  rtx out = (REG_P (rld[r].out)
 			     ? rld[r].out
 			     : rld[r].out_reg
@@ -8315,7 +8311,7 @@ emit_reload_insns (struct insn_chain *chain)
 
 		  mode = GET_MODE (reg);
 		  regno = REGNO (reg);
-		  nregs = hard_regno_nregs[regno][mode];
+		  nregs = REG_NREGS (reg);
 		  if (REG_P (rld[r].in)
 		      && REGNO (rld[r].in) >= FIRST_PSEUDO_REGISTER)
 		    in = rld[r].in;
@@ -8837,10 +8833,7 @@ delete_output_reload (rtx_insn *insn, int j, int last_reload_reg,
     return;
 
   regno = REGNO (reg);
-  if (regno >= FIRST_PSEUDO_REGISTER)
-    nregs = 1;
-  else
-    nregs = hard_regno_nregs[regno][GET_MODE (reg)];
+  nregs = REG_NREGS (reg);
 
   /* If the pseudo-reg we are reloading is no longer referenced
      anywhere between the store into it and here,
diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c
index 92c0c6572b6..ce6a8696ebe 100644
--- a/gcc/sel-sched.c
+++ b/gcc/sel-sched.c
@@ -1348,7 +1348,7 @@ choose_best_reg_1 (HARD_REG_SET hard_regs_used,
       gcc_assert (mode == GET_MODE (orig_dest));
 
       regno = REGNO (orig_dest);
-      for (i = 0, n = hard_regno_nregs[regno][mode]; i < n; i++)
+      for (i = 0, n = REG_NREGS (orig_dest); i < n; i++)
         if (TEST_HARD_REG_BIT (hard_regs_used, regno + i))
           break;
 
@@ -1463,7 +1463,7 @@ choose_best_pseudo_reg (regset used_regs,
       if (HARD_REGISTER_NUM_P (orig_regno))
 	{
 	  int j, n;
-	  for (j = 0, n = hard_regno_nregs[orig_regno][mode]; j < n; j++)
+	  for (j = 0, n = REG_NREGS (dest); j < n; j++)
 	    if (REGNO_REG_SET_P (used_regs, orig_regno + j))
 	      break;
 	  if (j < n)