From c34cc7e5de01d127a573956f9ad3fd823c1a70d3 Mon Sep 17 00:00:00 2001
From: wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 6 Jul 1993 20:48:51 +0000
Subject: [PATCH] (invert_truthvalue): Check for ERROR_MARK input.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@4864 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/fold-const.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index d03ae53bc28..f6d86ada8ae 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -2076,6 +2076,9 @@ invert_truthvalue (arg)
   tree type = TREE_TYPE (arg);
   enum tree_code code = TREE_CODE (arg);
 
+  if (code == ERROR_MARK)
+    return arg;
+
   /* If this is a comparison, we can simply invert it, except for
      floating-point non-equality comparisons, in which case we just
      enclose a TRUTH_NOT_EXPR around what we have.  */
-- 
2.11.0