(get_narrower): Preserve unsignedness when bitschange == 0.

From-SVN: r4842

(get_narrower): Preserve unsignedness when bitschange == 0.
From-SVN: r4842
e02b9957 · Doug Evans · ccc98036 · e02b9957
Commit e02b9957 authored Jul 05, 1993 by Doug Evans
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Showing with 8 additions and 1 deletions

gcc/tree.c
+8 -1

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--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -3162,7 +3162,14 @@ get_narrower (op, unsignedp_ptr)
 	    break;
 	  first = 0;
 	}
-      /* A change in nominal type can always be stripped.  */
+      else /* bitschange == 0 */
+	{
+	  /* A change in nominal type can always be stripped, but we must
+	     preserve the unsignedness.  */
+	  if (first)
+	    uns = TREE_UNSIGNED (TREE_TYPE (op));
+	  first = 0;
+	}

      win = op;
    }