reference/shaders-msl/comp/struct-layout.comp

#include <metal_stdlib>
#include <simd/simd.h>

using namespace metal;

struct Foo
{
    float4x4 m;
};

struct SSBO2
{
    Foo out_data[1];
};

struct SSBO
{
    Foo in_data[1];
};

kernel void main0(const device SSBO& _30 [[buffer(0)]], device SSBO2& _23 [[buffer(1)]], uint3 gl_GlobalInvocationID [[thread_position_in_grid]])
{
    uint ident = gl_GlobalInvocationID.x;
    _23.out_data[ident].m = _30.in_data[ident].m * _30.in_data[ident].m;
}