SKIP: FAILED

struct VertexOutput {
  float4 pos;
  vector<float16_t, 2> prevent_dce;
};

struct vertex_main_outputs {
  nointerpolation vector<float16_t, 2> VertexOutput_prevent_dce : TEXCOORD0;
  float4 VertexOutput_pos : SV_Position;
};


RWByteAddressBuffer prevent_dce : register(u0);
vector<float16_t, 2> tint_bitcast_to_f16(float src) {
  uint v = asuint(src);
  float t_low = f16tof32((v & 65535u));
  float t_high = f16tof32(((v >> 16u) & 65535u));
  float16_t v_1 = float16_t(t_low);
  return vector<float16_t, 2>(v_1, float16_t(t_high));
}

vector<float16_t, 2> bitcast_9ca42c() {
  float arg_0 = 1.0f;
  vector<float16_t, 2> res = tint_bitcast_to_f16(arg_0);
  return res;
}

void fragment_main() {
  prevent_dce.Store<vector<float16_t, 2> >(0u, bitcast_9ca42c());
}

[numthreads(1, 1, 1)]
void compute_main() {
  prevent_dce.Store<vector<float16_t, 2> >(0u, bitcast_9ca42c());
}

VertexOutput vertex_main_inner() {
  VertexOutput tint_symbol = (VertexOutput)0;
  tint_symbol.pos = (0.0f).xxxx;
  tint_symbol.prevent_dce = bitcast_9ca42c();
  VertexOutput v_2 = tint_symbol;
  return v_2;
}

vertex_main_outputs vertex_main() {
  VertexOutput v_3 = vertex_main_inner();
  VertexOutput v_4 = v_3;
  VertexOutput v_5 = v_3;
  vertex_main_outputs v_6 = {v_5.prevent_dce, v_4.pos};
  return v_6;
}

FXC validation failure:
c:\src\dawn\Shader@0x00000207343C31B0(3,10-18): error X3000: syntax error: unexpected token 'float16_t'