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.

1 files changed, 3 insertions, 1 deletions

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 */