https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89968
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The alignment is respected for members of other types than char so the order of
the attributes doesn't seem to matter here (it does matter in pr89950):
$ cat pr89968-2.c && gcc -S -O2 -Wall -fdump-tree-optimized=/dev/stdout
pr89968-2.c
struct S
{
char c;
__attribute__ ((aligned (64), packed, vector_size (1024))) int v; // okay
};
int f (void) { return sizeof (struct S); } // 1088
int g (void) { return __alignof__ (struct S); } // 64
__attribute__ ((aligned (64), vector_size (1024))) int v1;
int h1 (void) { return __alignof__ (v1); } // 1024
__attribute__ ((vector_size (1024), aligned (64))) int v2;
int h2 (void) { return __alignof__ (v2); } // 64
;; Function f (f, funcdef_no=0, decl_uid=1909, cgraph_uid=1, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741824]:
return 1088;
}
;; Function g (g, funcdef_no=1, decl_uid=1912, cgraph_uid=2, symbol_order=1)
g ()
{
<bb 2> [local count: 1073741824]:
return 64;
}
;; Function h1 (h1, funcdef_no=2, decl_uid=1916, cgraph_uid=3, symbol_order=3)
h1 ()
{
<bb 2> [local count: 1073741824]:
return 1024;
}
;; Function h2 (h2, funcdef_no=5, decl_uid=1920, cgraph_uid=4, symbol_order=5)
h2 ()
{
<bb 2> [local count: 1073741824]:
return 64;
}
