From: Doug Evans <dje@gnu.org>
Date: Mon, 5 Jul 1993 06:25:00 +0000 (+0000)
Subject: (get_narrower): Preserve unsignedness when bitschange == 0.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e02b99578f39276f5c18f6a310bcb2949508966f;p=gcc.git

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

From-SVN: r4842
---

diff --git a/gcc/tree.c b/gcc/tree.c
index 82bf4ccc07a..5f57d4347bb 100644
--- 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;
     }