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unions: initzialize only one field

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struct {
      union {
        int a,b;
      };
      int c;
    } sss = { 1,2 };

This had previously assigned 1,2 to a,b and 0 to c which is wrong.
This commit is contained in:
grischka 2009-06-17 02:09:07 +02:00
parent bba515afe5
commit 69fdb57edd
1 changed files with 18 additions and 0 deletions
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18
tccgen.c
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@ -4530,6 +4530,24 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
index = index + type_size(&f->type, &align1);
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)
break;
}
f = f->next;
}
f = f->next;
if (no_oblock && f == NULL)
break;