From cf19d2a9d80c2e2b71f23b962dd4b871667c39df Mon Sep 17 00:00:00 2001
From: Jeff Law <law@gcc.gnu.org>
Date: Sat, 13 Aug 1994 11:51:15 -0600
Subject: [PATCH] reload1.c (emit_reload_insns): Handle a secondary input
 reload which needs to use secondary memory too.

        * reload1.c (emit_reload_insns): Handle a secondary input reload
        which needs to use secondary memory too.

From-SVN: r7912
---
 gcc/reload1.c | 46 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 1ae411618e9..2891bd33638 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -6001,8 +6001,50 @@ emit_reload_insns (insn)
 		    {
 		      if (icode != CODE_FOR_nothing)
 			{
-			  emit_insn (GEN_FCN (icode) (reloadreg, real_oldequiv,
-						      second_reload_reg));
+			  rtx pat;
+#ifdef SECONDARY_MEMORY_NEEDED
+			  /* If we need a memory location to do the move, do
+			     it that way.  */
+			  if (GET_CODE (real_oldequiv) == REG
+			      && REGNO (real_oldequiv) < FIRST_PSEUDO_REGISTER
+			      && SECONDARY_MEMORY_NEEDED
+			      (REGNO_REG_CLASS (REGNO (real_oldequiv)),
+			       REGNO_REG_CLASS (REGNO (second_reload_reg)),
+			       GET_MODE (second_reload_reg)))
+			    {
+			      /* Get the memory to use and rewrite both
+				 registers to its mode.  */
+			      rtx loc
+				= get_secondary_mem (real_oldequiv,
+						     GET_MODE (second_reload_reg),
+						     reload_opnum[j],
+						     reload_when_needed[j]);
+			      rtx tmp_reloadreg;
+
+			      if (GET_MODE (loc)
+				  != GET_MODE (second_reload_reg))
+				second_reload_reg
+				  = gen_rtx (REG,
+					     GET_MODE (loc),
+					     REGNO (second_reload_reg));
+			  
+			      if (GET_MODE (loc) != GET_MODE (real_oldequiv))
+				tmp_reloadreg = gen_rtx (REG, GET_MODE (loc),
+							 REGNO (real_oldequiv));
+			      else
+				tmp_reloadreg = real_oldequiv;
+			      
+			      emit_move_insn (loc, tmp_reloadreg);
+			      emit_move_insn (second_reload_reg, loc);
+			      pat = gen_move_insn (reloadreg, second_reload_reg);
+			      
+			    }
+			  else
+#endif
+			    pat = GEN_FCN (icode) (reloadreg,
+						   real_oldequiv,
+						   second_reload_reg);
+			  emit_insn (pat);
 			  special = 1;
 			}
 		      else