https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102148
Bug ID: 102148
Summary: ppc64le: homogeneous float arguments are not passed
correctly
Product: gcc
Version: 8.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zlwang at ca dot ibm.com
Target Milestone: ---
example program:
typedef struct {
float a[2];
} sub;
typedef struct {float b; sub c; float d;} R;
extern R func(long,R,float,int);
R v = {0, {1,2}, 3};
double ma() {
R rv = func(77,v,88,99);
return rv.d;
}
Since R is a homogeneous float aggregate with less than 8 elements, func
argument passing should look like the following function:
func(long, float, float, float, float, float, int)
But they are not. At least for gcc8.4.1, the latter's long/int are passed in r3
and r9 respectively; while the former's long/int are passed in r3 and r7
respectively.
