SKIP: FAILED


RWByteAddressBuffer prevent_dce : register(u0);
int2 quadSwapDiagonal_a090b0() {
  int2 res = QuadReadAcrossDiagonal((1).xx);
  return res;
}

void fragment_main() {
  prevent_dce.Store2(0u, asuint(quadSwapDiagonal_a090b0()));
}

[numthreads(1, 1, 1)]
void compute_main() {
  prevent_dce.Store2(0u, asuint(quadSwapDiagonal_a090b0()));
}

FXC validation failure:
C:\src\dawn\Shader@0x000001F47D2FFDE0(4,14-43): error X3004: undeclared identifier 'QuadReadAcrossDiagonal'