SKIP: FAILED

RWByteAddressBuffer prevent_dce : register(u0);

float4 quadSwapDiagonal_331804() {
  float4 res = QuadReadAcrossDiagonal((1.0f).xxxx);
  return res;
}

void fragment_main() {
  prevent_dce.Store4(0u, asuint(quadSwapDiagonal_331804()));
  return;
}

[numthreads(1, 1, 1)]
void compute_main() {
  prevent_dce.Store4(0u, asuint(quadSwapDiagonal_331804()));
  return;
}
FXC validation failure:
<scrubbed_path>(4,16-50): error X3004: undeclared identifier 'QuadReadAcrossDiagonal'