------- Comment #1 from pinskia at gcc dot gnu dot org 2008-08-13 21:26 -------
> struct X { uint32_t a:17; uint8_t b:8; bool c:1; };
0...16 is a as uint32_t is more than 17 bytes
17...24 is b as uint8_t is 8 bytes
25...26 is c as bool is 1 byte
so 26bits which is a little over 4 bytes. so it needs to be rounded (aligned)
to 4 byte so we get 8 bytes.
I don't see what the issue here is. if we replace uint32_t with uint16_t, the
sizes are reduced as it only stores 16 bytes and the alignment of the struct
becomes 2 byte aligned.
Why do you think the original struct should be 4 bytes? I cannot count how it
could ever be 4 bytes really except for replacing of uint32_t with uint16_t.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37119
