From 075723456073bf7319805ce964a3f8a036eb7d27 Mon Sep 17 00:00:00 2001
From: Michael Matz <matz@suse.de>
Date: Fri, 5 May 2017 23:16:43 +0200
Subject: Fix unsigned enum bit-fields

See testcase.  If an enum has only positive values, fits N bits,
and is placed in a N-bit bit-field that bit-fields must be treated
as unsigned, not signed.
---
 tccgen.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'tccgen.c')

diff --git a/tccgen.c b/tccgen.c
index cbfe5ff..b9938ea 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -1082,7 +1082,9 @@ ST_FUNC int gv(int rc)
         } else
             type.t = VT_INT;
         if((vtop->type.t & VT_UNSIGNED) ||
-           (vtop->type.t & VT_BTYPE) == VT_BOOL)
+           (vtop->type.t & VT_BTYPE) == VT_BOOL ||
+	   (((vtop->type.t & VT_BTYPE) == VT_ENUM) &&
+	    vtop->type.ref->a.unsigned_enum))
             type.t |= VT_UNSIGNED;
         gen_cast(&type);
         /* generate shifts */
-- 
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