GCC 4.0.x on s390{,x} aligned vector_size 1/2/4/8/64/128/... types
to their size, just vector_size 16 and 32 has been 8 bytes aligned
(BIGGEST_ALIGNMENT).
It is just a side-effect of the 3.4/4.0 code - if there was a supported
integer mode on the target for the requested size, then alignment of
Jakub Jelinek wrote:
On Tue, Nov 29, 2005 at 10:01:25PM +, Joern RENNECKE wrote:
If we use MIN (tree_low_cst (TYPE_SIZE (type), 0), BIGGEST_ALIGNMENT)
here, I'm afraid that would be much bigger ABI incompatibility.
Currently, say
typedef char __attribute__((vector_size (64))) v64qi;
is 6
On Tue, Nov 29, 2005 at 10:01:25PM +, Joern RENNECKE wrote:
> >If we use MIN (tree_low_cst (TYPE_SIZE (type), 0), BIGGEST_ALIGNMENT)
> >here, I'm afraid that would be much bigger ABI incompatibility.
> >Currently, say
> >typedef char __attribute__((vector_size (64))) v64qi;
> >is 64 bytes align
Jakub Jelinek wrote:
If we use MIN (tree_low_cst (TYPE_SIZE (type), 0), BIGGEST_ALIGNMENT)
here, I'm afraid that would be much bigger ABI incompatibility.
Currently, say
typedef char __attribute__((vector_size (64))) v64qi;
is 64 bytes aligned on most arches, even when BIGGEST_ALIGNMENT is m
On Tue, Nov 29, 2005 at 01:44:44PM +, Joern RENNECKE wrote:
> No, it wasn't. The change was supposed to affect structures only.
> As I understand the documentation ,the expected behaviour would be to
> limit the alignment
> to BIGGEST_ALIGNMENT, unless the user has specified a larger alignmen
Jakub Jelinek wrote:
I have looked just at one failure, but maybe all of them are the same thing.
typedef char __attribute__((vector_size (16))) v16qi;
int i = __alignof__ (v16qi);
with GCC 4.0 sets i to 8 (s390{,x} have BIGGEST_ALIGNMENT 64), but
GCC 4.1 sets i to 16.
The changes that created
Hi!
There are several g*dg/compat/ tests failing that show ABI
incompatibilities:
FAIL: tmpdir-g++.dg-struct-layout-1/t024 cp_compat_x_tst.o-cp_compat_y_alt.o
execute
FAIL: tmpdir-g++.dg-struct-layout-1/t024 cp_compat_x_alt.o-cp_compat_y_tst.o
execute
FAIL: tmpdir-g++.dg-struct-layout-1/t026 cp
