(substitute_expr): Don't abort for RTL_EXPR and SAVE_EXPR; just do

nothing.

From-SVN: r6357

diff --git a/gcc/tree.c b/gcc/tree.c
index 8324ba1583f79e08a0d39953eb1425a12ce11e12..2e4bb129d73afcde615e0e92657d4ce6ae1de933 100644 (file)
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1,5 +1,5 @@
 /* Language-independent node constructors for parse phase of GNU compiler.
-   Copyright (C) 1987, 1988, 1992, 1993 Free Software Foundation, Inc.
+   Copyright (C) 1987, 1988, 1992, 1993, 1994 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -2017,7 +2017,11 @@ substitute_in_expr (exp, f, r)
                                                   f, r)));
 
        case 2:
-         if (code == RTL_EXPR || code == CONSTRUCTOR)
+         /* An RTL_EXPR cannot contain a PLACEHOLDER_EXPR; a CONSTRUCTOR
+            could, but we don't support it.  */
+         if (code == RTL_EXPR)
+           return exp;
+         else if (code == CONSTRUCTOR)
            abort ();
 
          return fold (build (code, TREE_TYPE (exp),
@@ -2026,6 +2030,11 @@ substitute_in_expr (exp, f, r)
                                                  f, r)));
 
        case 3:
+         /* It cannot be that anything inside a SAVE_EXPR contains a
+            PLACEHOLDER_EXPR.  */
+         if (code == SAVE_EXPR)
+           return exp;
+
          if (code != COND_EXPR)
            abort ();