SPIRV-Cross/reference/shaders-msl/comp/spec-constant-work-group-size.comp

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

#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];
    }
};

#ifndef SPIRV_CROSS_CONSTANT_ID_1
#define SPIRV_CROSS_CONSTANT_ID_1 2
#endif
constant int b = SPIRV_CROSS_CONSTANT_ID_1;
constant int a_tmp [[function_constant(0)]];
constant int a = is_function_constant_defined(a_tmp) ? a_tmp : 1;

struct SSBO
{
    spvUnsafeArray<int, 1> v;
};

constant uint _21 = (uint(a) + 0u);
constant uint _22_tmp [[function_constant(10)]];
constant uint _22 = is_function_constant_defined(_22_tmp) ? _22_tmp : 1u;
constant uint3 gl_WorkGroupSize [[maybe_unused]] = uint3(_22, 20u, 1u);
constant uint _27 = gl_WorkGroupSize.x;
constant uint _28 = (_21 + _27);
constant uint _29 = gl_WorkGroupSize.y;
constant uint _30 = (_28 + _29);
constant int _32 = (1 - a);

kernel void main0(device SSBO& _17 [[buffer(0)]])
{
    spvUnsafeArray<int, b> spec_const_array_size;
    spec_const_array_size[a] = a;
    _17.v[_30] = b + spec_const_array_size[_32];
}