test/IRGen/invalid_alignment.swift

// RUN: %target-swift-frontend -emit-ir %s -verify

@_alignment(1) // expected-error{{cannot decrease alignment below natural alignment of 4}}
struct Bar { var x, y, z, w: Float }

@_alignment(1) // expected-error{{not supported on types with dynamic layout}}
struct Bas<T> { var x, y, z, w: T }

@_alignment(1) // expected-error{{cannot decrease alignment below natural alignment of 4}}
enum SingletonEnum { case X(Float, Float, Float, Float) }

@_alignment(1) // expected-error{{not supported on types with dynamic layout}}
enum DynamicSingletonEnum<T> { case X(T, T, T, T) }

@_alignment(1) // expected-error{{cannot decrease alignment below natural alignment of 2}}
enum NoPayloadEnum {
  case A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15
  case B0, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15
  case C0, C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15
  case D0, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15
  case E0, E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15
  case F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15
  case G0, G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G15
  case H0, H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14, H15
  case I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10, I11, I12, I13, I14, I15
  case J0, J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15
  case K0, K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, K12, K13, K14, K15
  case L0, L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11, L12, L13, L14, L15
  case M0, M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14, M15
  case N0, N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15
  case O0, O1, O2, O3, O4, O5, O6, O7, O8, O9, O10, O11, O12, O13, O14, O15
  case P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P15
  case MoreThan255
}

@_alignment(1) // expected-error{{cannot decrease alignment below natural alignment of 4}}
enum SinglePayloadEnum {
  case X(Float)
  case Y, Z
}

@_alignment(1) // expected-error{{not supported on types with dynamic layout}}
enum DynamicSinglePayloadEnum<T> {
  case X(T)
  case Y, Z
}

@_alignment(1) // expected-error{{cannot decrease alignment below natural alignment of 4}}
enum MultiPayloadEnum {
  case X(Float)
  case Y(Float)
}

/* TODO
@_alignment(1) // expected-todo-error{{not supported on types with dynamic layout}}
enum DynamicMultiPayloadEnum<T> {
  case X(T)
  case Y(T)
}
 */