groupshared int v; struct tint_symbol_1 { uint local_invocation_index : SV_GroupIndex; }; [numthreads(1, 1, 1)] void main(tint_symbol_1 tint_symbol) { const uint local_invocation_index = tint_symbol.local_invocation_index; if ((local_invocation_index == 0u)) { v = 0; } GroupMemoryBarrierWithGroupSync(); v; return; }