From 6709933d78d82f066f3234eb5194a81e5cbf8165 Mon Sep 17 00:00:00 2001
From: yuanbin <yuanbin0@gmail.com>
Date: Fri, 11 Jun 2010 20:28:31 +0800
Subject: [PATCH] tccgen: initial last member of union

---
 tccgen.c | 48 ++++++++++++++++++++++++++++--------------------
 1 file changed, 28 insertions(+), 20 deletions(-)

diff --git a/tccgen.c b/tccgen.c
index 9940df5..914afe1 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -4824,7 +4824,7 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
         /* patch type size if needed */
         if (n < 0)
             s->c = array_length;
-    } else if ((type->t & VT_BTYPE) == VT_STRUCT &&
+    } else if ((type->t & VT_BTYPE) == VT_STRUCT && type->ref->c && /* Coo: ignore empty */
                (sec || !first || tok == '{')) {
         int par_count;
 
@@ -4860,7 +4860,14 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
             no_oblock = 0;
         }
         s = type->ref;
-        f = s->next;
+        f = s->next;
+        /* Coo: initial last member of union */
+        while (f->next && f->next->c==f->c) {
+            if ((f->type.t&VT_BITFIELD) && (f->next->type.t&VT_BITFIELD)
+                && ((f->type.t>>VT_STRUCT_SHIFT)&0x3f)==((f->next->type.t>>VT_STRUCT_SHIFT)&0x3f))
+                break;
+            f = f->next;
+        }
         array_length = 0;
         index = 0;
         n = s->c;
@@ -4875,26 +4882,27 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
             if (index > array_length)
                 array_length = index;
 
-            /* gr: skip fields from same union - ugly. */
-            while (f->next) {
-                ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
-                /* test for same offset */
-                if (f->next->c != f->c)
-                    break;
-                /* if yes, test for bitfield shift */
-                if ((f->type.t & VT_BITFIELD) && (f->next->type.t & VT_BITFIELD)) {
-                    int bit_pos_1 = (f->type.t >> VT_STRUCT_SHIFT) & 0x3f;
-                    int bit_pos_2 = (f->next->type.t >> VT_STRUCT_SHIFT) & 0x3f;
-                    //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
-                    if (bit_pos_1 != bit_pos_2)
+            f = f->next;
+            /* Coo: initial last member of union */
+            if (f)
+                /* gr: skip fields from same union - ugly. */
+                while (f->next) {
+                    ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
+                    /* test for same offset */
+                    if (f->next->c != f->c)
                         break;
+                    /* if yes, test for bitfield shift */
+                    if ((f->type.t & VT_BITFIELD) && (f->next->type.t & VT_BITFIELD)) {
+                        int bit_pos_1 = (f->type.t >> VT_STRUCT_SHIFT) & 0x3f;
+                        int bit_pos_2 = (f->next->type.t >> VT_STRUCT_SHIFT) & 0x3f;
+                        //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
+                        if (bit_pos_1 != bit_pos_2)
+                            break;
+                    }
+                    f = f->next;
                 }
-                f = f->next;
-            }
-
-            f = f->next;
-            if (no_oblock && f == NULL)
-                break;
+            else if (no_oblock)
+                break;
             if (tok == '}')
                 break;
             skip(',');