https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99653
Bug ID: 99653
Summary: [AIX] Bitfield placement
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ABI
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
Target: powerpc-ibm-aix*
extern int printf(const char *, ...);
struct A {
long long x2 : 1;
long long x3 : 20;
long long x4 : 20;
} a;
void dumpA(void) {
typedef unsigned char *ucp;
ucp p;
for (p = (ucp)&a; p < (ucp)&1[&a]; ++p) {
printf("%02x ", (unsigned)*p);
}
printf("\n");
}
int main(void) {
a.x2=0;
a.x2-=1;
a.x4=-1;
dumpA();
return 0;
}
GCC: 80 00 07 ff ff 80 00 00
XLC: 80 00 00 00 ff ff f0 00
