SPIRV-Cross/reference/shaders-msl/comp/packing-test-1.comp

#pragma clang diagnostic ignored "-Wmissing-prototypes"
#pragma clang diagnostic ignored "-Wmissing-braces"

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

using namespace metal;

template<typename T, size_t Num>
struct spvUnsafeArray
{
    T elements[Num ? Num : 1];
    
    thread T& operator [] (size_t pos) thread
    {
        return elements[pos];
    }
    constexpr const thread T& operator [] (size_t pos) const thread
    {
        return elements[pos];
    }
    
    device T& operator [] (size_t pos) device
    {
        return elements[pos];
    }
    constexpr const device T& operator [] (size_t pos) const device
    {
        return elements[pos];
    }
    
    constexpr const constant T& operator [] (size_t pos) const constant
    {
        return elements[pos];
    }
    
    threadgroup T& operator [] (size_t pos) threadgroup
    {
        return elements[pos];
    }
    constexpr const threadgroup T& operator [] (size_t pos) const threadgroup
    {
        return elements[pos];
    }
};

struct T1
{
    float3 a;
    float b;
};

struct T1_1
{
    packed_float3 a;
    float b;
};

struct Buffer0
{
    spvUnsafeArray<T1_1, 1> buf0;
};

struct Buffer1
{
    spvUnsafeArray<float, 1> buf1;
};

constant uint3 gl_WorkGroupSize [[maybe_unused]] = uint3(32u, 1u, 1u);

kernel void main0(device Buffer0& _15 [[buffer(0)]], device Buffer1& _34 [[buffer(1)]], uint3 gl_GlobalInvocationID [[thread_position_in_grid]])
{
    T1 v;
    v.a = float3(_15.buf0[0].a);
    v.b = _15.buf0[0].b;
    float x = v.b;
    _34.buf1[gl_GlobalInvocationID.x] = x;
}