(fold): Don't record overflow when negating unsigned constants.

From-SVN: r10779

(fold): Don't record overflow when negating unsigned constants.
From-SVN: r10779
0c9cabe7 · Richard Kenner · e08e7137 · 0c9cabe7
Commit 0c9cabe7 authored Dec 16, 1995 by Richard Kenner
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gcc/fold-const.c
+1 -1

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--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -3549,7 +3549,7 @@ fold (expr)
 	      TREE_TYPE (t) = type;
 	      TREE_OVERFLOW (t)
 		= (TREE_OVERFLOW (arg0)
-		   | force_fit_type (t, overflow));
+		   | force_fit_type (t, overflow && !TREE_UNSIGNED (type)));
 	      TREE_CONSTANT_OVERFLOW (t)
 		= TREE_OVERFLOW (t) | TREE_CONSTANT_OVERFLOW (arg0);
 	    }