#include <intrin.h>

struct X { 
alignas(32) __m256 d;
};

void g1(X);
void g2(const X&);
void g3(const void *);

void f(float *ptr) {
    X x = {_mm256_load_ps(ptr)};
    g1(x);  // BUG: passes via unaligned (whatever rsp alignment is) stack
	g2(x);  // OK: passes via aligned stack location
    g3(&x); // OK: passes via aligned stack location
}