From: mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 25 Nov 1999 16:14:00 +0000 (+0000)
Subject: 	* tree.c (unsave_expr_now): Handle NULL_TREE as input.
X-Git-Tag: upstream/4.9.2~104432
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e082bb8e4b692beae4e05992ad902bb731daa738;p=platform%2Fupstream%2Flinaro-gcc.git

	* tree.c (unsave_expr_now): Handle NULL_TREE as input.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@30665 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 17119fb..29f4983 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+1999-11-25  Mark Mitchell  <mark@codesourcery.com>
+
+	* tree.c (unsave_expr_now): Handle NULL_TREE as input.
+
 Wed Nov 24 17:08:09 MET 1999  Jan Hubicka  <hubicka@freesoft.cz>
 
 	* reg-stack.c (subst_stack_regs_pat): Swap operands in commutative
diff --git a/gcc/tree.c b/gcc/tree.c
index 82b00e7..1ec2976 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -2469,6 +2469,10 @@ unsave_expr_now_r (expr)
 {
   enum tree_code code;
 
+  /* There's nothing to do for NULL_TREE.  */
+  if (!expr)
+    return;
+
   unsave_expr_1 (expr);
 
   code = TREE_CODE (expr);