SKIP: FAILED

<dawn>/src/tint/lang/msl/writer/printer/printer.cc:355 internal compiler error: %b1 = block {  # root
  %non_uniform_global:ptr<storage, i32, read_write> = var @binding_point(0, 0)
  %output:ptr<storage, f32, read_write> = var @binding_point(0, 1)
}

%tint_symbol = @fragment func():void -> %b2 {
  %b2 = block {
    %4:i32 = load %non_uniform_global
    %5:bool = lt %4, 0i
    if %5 [t: %b3] {  # if_1
      %b3 = block {  # true
        discard
        exit_if  # if_1
      }
    }
    %6:f32 = dpdx 1.0f
    store %output, %6
    ret
  }
}

unhandled variable address space
********************************************************************
*  The tint shader compiler has encountered an unexpected error.   *
*                                                                  *
*  Please help us fix this issue by submitting a bug report at     *
*  crbug.com/tint with the source program that triggered the bug.  *
********************************************************************