http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52238
Bug #: 52238
Summary: -mms-bitfields: __attribute__ ((aligned (n))) ignored
for struct members
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: michael.kosty...@gmail.com
The following test case
% cat > test.c << __EOF && gcc -mms-bitfields test.c && { ./a.out ; echo $? ; }
struct {
char a;
char b __attribute__ ((aligned (16)));
} s;
int main()
{
return (__PTRDIFF_TYPE__)&s.b & 15;
}
__EOF
returns 1, since s.b is not 16-byte aligned (with -mno-ms-bitfields it returns
0, as expected). The test passes with 4.1.2, but fails with 4.2.1 and above.
