* pa.c (shadd_operand): Newfunction.

From-SVN: r2850

gcc/config/pa/pa.c

@@ -2520,3 +2520,18 @@ function_label_operand  (op, mode)
 {
   return GET_CODE (op) == SYMBOL_REF && FUNCTION_NAME_P (XSTR (op, 0));
 }
+
+/* Return 1 if OP is suitable for the second add operand (the unshifed 
+   operand) in an shadd instruction.   Allow CONST_INT to work around
+   a reload bug.  */
+int
+shadd_operand (op, mode)
+     rtx op;
+     enum machine_mode mode;
+{
+  if (GET_CODE (op) == REG)
+    return 1;
+  if (GET_CODE (op) == CONST_INT)
+    return 1;
+  return 0;
+}

gcc/config/pa/pa.md

@@ -2039,13 +2039,13 @@
   [(set_attr "type" "load")
    (set_attr "length" "1")])
 
-;; Using nonmemory_operand works around a bug in reload.  For 2.4 fix
+;; Using shadd_operand works around a bug in reload.  For 2.4 fix
 ;; reload and use register_operand instead.
 (define_insn ""
   [(set (match_operand:SI 0 "register_operand" "=r")
 	(plus:SI (mult:SI (match_operand:SI 2 "register_operand" "r")
 			  (const_int 2))
-		 (match_operand:SI 1 "nonmemory_operand" "r")))]
+		 (match_operand:SI 1 "shadd_operand" "r")))]
   ""
   "sh1add %2,%1,%0")
 
@@ -2053,7 +2053,7 @@
   [(set (match_operand:SI 0 "register_operand" "=r")
 	(plus:SI (mult:SI (match_operand:SI 2 "register_operand" "r")
 			  (const_int 4))
-		 (match_operand:SI 1 "nonmemory_operand" "r")))]
+		 (match_operand:SI 1 "shadd_operand" "r")))]
   ""
   "sh2add %2,%1,%0")
 
@@ -2061,7 +2061,7 @@
   [(set (match_operand:SI 0 "register_operand" "=r")
 	(plus:SI (mult:SI (match_operand:SI 2 "register_operand" "r")
 			  (const_int 8))
-		 (match_operand:SI 1 "nonmemory_operand" "r")))]
+		 (match_operand:SI 1 "shadd_operand" "r")))]
   ""
   "sh3add %2,%1,%0")