This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [RFC] Change (flatten) representation of memory references

> I was mainly worried about us trying to for example copy a bit-packed
> substructure like
>
> struct A {
>   unsigned use_1_bit : 1;
>   struct B {
>     char large[100];
>   } b;
> } a, b;
>
> where b.large[0] is at offset 1 bit of a (I believe this is possible
> with Ada, right?).

Actually no, it's not possible.  Once something is BLKmode, it's at least 
aligned on a byte boundary.  It's only possible for integral modes.

-- 
Eric Botcazou
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]