(unsave_expr_now): Avoid use of NULL_RTX since no rtl.h.

From-SVN: r12037

diff --git a/gcc/tree.c b/gcc/tree.c
index 0e31d5322fb63babea5311062bcf2aec93d0df92..4d65da50a392bf3ad41723550a7ae73b9aabbbd1 100644 (file)
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -2191,7 +2191,7 @@ unsave_expr_now (expr)
   switch (code)
     {
     case SAVE_EXPR:
-      SAVE_EXPR_RTL (expr) = NULL_RTX;
+      SAVE_EXPR_RTL (expr) = 0;
       break;
 
     case TARGET_EXPR:
@@ -2201,12 +2201,12 @@ unsave_expr_now (expr)
       
     case RTL_EXPR:
       /* I don't yet know how to emit a sequence multiple times.  */
-      if (RTL_EXPR_SEQUENCE (expr) != NULL_RTX)
+      if (RTL_EXPR_SEQUENCE (expr) != 0)
        abort ();
       break;
 
     case CALL_EXPR:
-      CALL_EXPR_RTL (expr) = NULL_RTX;
+      CALL_EXPR_RTL (expr) = 0;
       if (TREE_OPERAND (expr, 1)
          && TREE_CODE (TREE_OPERAND (expr, 1)) == TREE_LIST)
        {