reload.c (find_reloads): When reloading a PLUS with constant operand...

	* reload.c (find_reloads): When reloading a PLUS with constant
	operand, make sure the constant is pushed to the constant pool
	if required.
	* config/s390/s390.c (s390_secondary_input_reload_class): Remove
	reload bug workaround.
	(s390_expand_plus_operand): Likewise.

From-SVN: r89047

gcc/ChangeLog

+2004-10-14  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* reload.c (find_reloads): When reloading a PLUS with constant
+	operand, make sure the constant is pushed to the constant pool
+	if required.
+	* config/s390/s390.c (s390_secondary_input_reload_class): Remove
+	reload bug workaround.
+	(s390_expand_plus_operand): Likewise.
+
 2004-10-14  David Edelsohn  <edelsohn@gnu.org>
 
 	* opts.c (common_handle_option): Do not enable

gcc/config/s390/s390.c

@@ -2274,17 +2274,7 @@ s390_secondary_input_reload_class (enum reg_class class ATTRIBUTE_UNUSED,
 				   enum machine_mode mode, rtx in)
 {
   if (s390_plus_operand (in, mode))
-    {
-      /* ??? Reload sometimes pushes a PLUS reload with a too-large constant.
-	 Until reload is fixed, we need to force_const_mem while emitting the
-	 secondary reload insn -- thus we need to make sure here that we do
-	 have a literal pool for the current function.  */
-      if (CONSTANT_P (XEXP (in, 1))
-	  && !legitimate_reload_constant_p (XEXP (in, 1)))
-	current_function_uses_const_pool = true;
-
-      return ADDR_REGS;
-    }
+    return ADDR_REGS;
 
   return NO_REGS;
 }
@@ -2366,10 +2356,6 @@ s390_expand_plus_operand (register rtx target, register rtx src,
 	}
       if (true_regnum (sum2) < 1 || true_regnum (sum2) > 15)
 	{
-	  /* ??? See comment in s390_secondary_input_reload_class.  */
-	  if (CONSTANT_P (sum2) && !legitimate_reload_constant_p (sum2))
-	    sum2 = force_const_mem (Pmode, sum2);
-
 	  emit_move_insn (scratch, sum2);
 	  sum2 = scratch;
 	}

gcc/reload.c

@@ -3778,6 +3778,27 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
 	  goal_alternative_win[i] = 1;
       }
 
+  /* Likewise any invalid constants appearing as operand of a PLUS
+     that is to be reloaded.  */
+  for (i = 0; i < noperands; i++)
+    if (! goal_alternative_win[i]
+	&& GET_CODE (recog_data.operand[i]) == PLUS
+	&& CONST_POOL_OK_P (XEXP (recog_data.operand[i], 1))
+	&& (PREFERRED_RELOAD_CLASS (XEXP (recog_data.operand[i], 1),
+				    (enum reg_class) goal_alternative[i])
+	     == NO_REGS)
+	&& operand_mode[i] != VOIDmode)
+      {
+	rtx tem = force_const_mem (operand_mode[i],
+				   XEXP (recog_data.operand[i], 1));
+	tem = gen_rtx_PLUS (operand_mode[i],
+			    XEXP (recog_data.operand[i], 0), tem);
+
+	substed_operand[i] = recog_data.operand[i]
+	  = find_reloads_toplev (tem, i, address_type[i],
+				 ind_levels, 0, insn, NULL);
+      }
+
   /* Record the values of the earlyclobber operands for the caller.  */
   if (goal_earlyclobber)
     for (i = 0; i < noperands; i++)