commit 498bcc6f4a07514d28d7867e27c94a1f642fe2bc
Author: jiang <address@hidden>
Date:   Sun Jun 22 15:24:18 2014 +0800

    bug:
    struct { unsigned a:9, b:7, c:5; } s;
                s.a = s.b = s.c = 3;
     printf("%d / %d / %d\n", s.a, s.b, s.c);
    
    out:
    0 / 0 / 3
    
    and:
    
    struct {
      unsigned a:9, b:5, c:7;
     } _s, *s = &_s;
     int n = 250;
    
     s->a = s->b = s->c = n + 4;
      printf("--> %d / %d / %d\n", s->a, s->b, s->c);
    out:
    -> 0 / 0 / 126

diff --git a/tccgen.c b/tccgen.c
index f134586..83a7752 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -2549,6 +2549,15 @@ ST_FUNC void vstore(void)
         /* bitfield store handling */
         bit_pos = (ft >> VT_STRUCT_SHIFT) & 0x3f;
         bit_size = (ft >> (VT_STRUCT_SHIFT + 6)) & 0x3f;
+
+        vpushv(&vtop[0]);
+        if(((vtop->r & (VT_VALMASK | VT_LVAL)) < VT_CONST) && (vtop > (vstack + 2))){
+            int r = get_reg(RC_INT);
+            load(r, vtop);
+            vtop->r = r;
+        }
+        vrott(3);
+
         /* remove bit field info to avoid loops */
         vtop[-1].type.t = ft & ~(VT_BITFIELD | (-1 << VT_STRUCT_SHIFT));
 
@@ -2583,6 +2592,7 @@ ST_FUNC void vstore(void)
         gen_op('|');
         /* store result */
         vstore();
+        vtop--;
     } else {
 #ifdef CONFIG_TCC_BCHECK
         /* bound check case */
@@ -4066,7 +4076,7 @@ ST_FUNC void unary(void)
         } else if (tok == '[') {
             next();
             gexpr();
-            if(tcc_state->warn_char_subscripts && (vtop->type.t & (VT_BTYPE|VT_UNSIGNED)) == VT_BYTE)
+            if(tcc_state->warn_char_subscripts && (vtop->type.t & (VT_BTYPE|VT_DEFSIGN|VT_UNSIGNED)) == VT_BYTE)
                 tcc_warning("array subscript has type 'char'");
             gen_op('+');
             indir();
diff --git a/tests/tests2/03_struct.c b/tests/tests2/03_struct.c
index c5d48c5..070c8d2 100644
--- a/tests/tests2/03_struct.c
+++ b/tests/tests2/03_struct.c
@@ -27,5 +27,35 @@ int main()
    printf("%d\n", jones[1].boris);
    printf("%d\n", jones[1].natasha);
 
+   struct sbf1 {
+        int f1 : 3;
+        int : 2;
+        int f2 : 1;
+        int : 0;
+        int f3 : 5;
+        int f4 : 7;
+        unsigned int f5 : 7;
+   } st1;
+   st1.f1 = st1.f2 = st1.f3 = st1.f4 = st1.f5 = 3;
+   printf("%d %d %d %d %d\n",
+         st1.f1, st1.f2, st1.f3, st1.f4, st1.f5);
+
+   struct { unsigned a:9, b:7, c:5; } s1;
+            s1.a = s1.b = s1.c = 3;
+   printf("%d / %d / %d\n", s1.a, s1.b, s1.c);
+
+   struct {
+        unsigned a:9, b:5, c:7;
+   } s2, *ps = &s2;
+   int n = 250;
+
+   ps->a = ps->b = ps->c = n + 4;
+   printf("%d / %d / %d\n", ps->a, ps->b, ps->c);
+   
+   ps->a = n + 4;
+   ps->b = n + 4;
+   ps->c = n + 4;
+   printf("%d / %d / %d\n", ps->a, ps->b, ps->c);
+
    return 0;
 }
diff --git a/tests/tests2/03_struct.expect b/tests/tests2/03_struct.expect
index ecbf589..ac7d10d 100644
--- a/tests/tests2/03_struct.expect
+++ b/tests/tests2/03_struct.expect
@@ -4,3 +4,7 @@
 34
 56
 78
+3 -1 3 3 3
+3 / 3 / 3
+254 / 30 / 126
+254 / 30 / 126