c4x.c (c4x_legitimize_address): Don't generate a LO_SUM address for HImode or…

c4x.c (c4x_legitimize_address): Don't generate a LO_SUM address for HImode or HFmode but instead force address...

	* config/c4x/c4x.c (c4x_legitimize_address): Don't generate a
 	LO_SUM address for HImode or HFmode but instead force address into
 	a register so that it is offsettable.
	(c4x_emit_move_sequence): Handle LO_SUM immediate address.

From-SVN: r25087

gcc/ChangeLog

+Tue Feb  9 10:52:27 1999  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
+
+	* config/c4x/c4x.c (c4x_legitimize_address): Don't generate a
+ 	LO_SUM address for HImode or HFmode but instead force address into
+ 	a register so that it is offsettable.
+	(c4x_emit_move_sequence): Handle LO_SUM immediate address.
+
 Tue Feb  9 10:46:42 1999  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
 
 	* config/c4x/c4x.c (c4x_address_cost): Return cost of 1 for

gcc/config/c4x/c4x.c

@@ -1015,7 +1015,6 @@ c4x_null_epilogue_p ()
   return 0;
 }
 
-
 int
 c4x_emit_move_sequence (operands, mode)
      rtx *operands;
@@ -1030,7 +1029,15 @@ c4x_emit_move_sequence (operands, mode)
       && ! (stik_const_operand (op1, mode) && ! push_operand (op0, mode)))
     op1 = force_reg (mode, op1);
 
-  if (symbolic_operand (op1, mode))
+  if (GET_CODE (op1) == LO_SUM
+      && GET_MODE (op1) == Pmode
+      && dp_reg_operand (XEXP (op1, 0), mode))
+    {
+      /* expand_increment will sometimes create a LO_SUM immediate
+	 address.  */
+      op1 = XEXP (op1, 1);
+    }
+  else if (symbolic_operand (op1, mode))
     {
       if (TARGET_LOAD_ADDRESS)
 	{
@@ -1426,6 +1433,16 @@ c4x_legitimize_address (orig, mode)
 {
   if (GET_CODE (orig) == SYMBOL_REF)
     {
+      if (mode == HImode || mode == HFmode)
+	{
+	  /* We need to force the address into
+	     a register so that it is offsettable.  */
+	  rtx addr_reg = gen_reg_rtx (Pmode);
+	  emit_move_insn (addr_reg, orig);
+	  return addr_reg;
+	}
+      else
+	{
 	  rtx dp_reg = gen_rtx_REG (Pmode, DP_REGNO);
 	  
 	  if (! TARGET_SMALL)
@@ -1433,6 +1450,7 @@ c4x_legitimize_address (orig, mode)
 	  
 	  return gen_rtx_LO_SUM (Pmode, dp_reg, orig);
 	}
+    }
 
   return NULL_RTX;
 }