#version 310 es shared int S; int func_S() { return S; } void tint_symbol(uint local_invocation_index) { { S = 0; } barrier(); int r = func_S(); } layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in; void main() { tint_symbol(gl_LocalInvocationIndex); return; }