src/test/codegen/align-struct.rs

   1 // compile-flags: -C no-prepopulate-passes -Z mir-opt-level=0
   2 //
   3
   4 #![crate_type = "lib"]
   5
   6 #[repr(align(64))]
   7 pub struct Align64(i32);
   8 // CHECK: %Align64 = type { [0 x i32], i32, [15 x i32] }
   9
  10 pub struct Nested64 {
  11     a: Align64,
  12     b: i32,
  13     c: i32,
  14     d: i8,
  15 }
  16 // CHECK: %Nested64 = type { [0 x i64], %Align64, [0 x i32], i32, [0 x i32], i32, [0 x i8], i8, [55 x i8] }
  17
  18 pub enum Enum4 {
  19     A(i32),
  20     B(i32),
  21 }
  22 // CHECK: %"Enum4::A" = type { [1 x i32], i32, [0 x i32] }
  23
  24 pub enum Enum64 {
  25     A(Align64),
  26     B(i32),
  27 }
  28 // CHECK: %Enum64 = type { [0 x i32], i32, [31 x i32] }
  29 // CHECK: %"Enum64::A" = type { [8 x i64], %Align64, [0 x i64] }
  30
  31 // CHECK-LABEL: @align64
  32 #[no_mangle]
  33 pub fn align64(i : i32) -> Align64 {
  34 // CHECK: %a64 = alloca %Align64, align 64
  35 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 64 %{{.*}}, i8* align 64 %{{.*}}, i{{[0-9]+}} 64, i1 false)
  36     let a64 = Align64(i);
  37     a64
  38 }
  39
  40 // For issue 54028: make sure that we are specifying the correct alignment for fields of aligned
  41 // structs
  42 // CHECK-LABEL: @align64_load
  43 #[no_mangle]
  44 pub fn align64_load(a: Align64) -> i32 {
  45 // CHECK: [[FIELD:%.*]] = bitcast %Align64* %{{.*}} to i32*
  46 // CHECK: {{%.*}} = load i32, i32* [[FIELD]], align 64
  47     a.0
  48 }
  49
  50 // CHECK-LABEL: @nested64
  51 #[no_mangle]
  52 pub fn nested64(a: Align64, b: i32, c: i32, d: i8) -> Nested64 {
  53 // CHECK: %n64 = alloca %Nested64, align 64
  54     let n64 = Nested64 { a, b, c, d };
  55     n64
  56 }
  57
  58 // CHECK-LABEL: @enum4
  59 #[no_mangle]
  60 pub fn enum4(a: i32) -> Enum4 {
  61 // CHECK: %e4 = alloca { i32, i32 }, align 4
  62     let e4 = Enum4::A(a);
  63     e4
  64 }
  65
  66 // CHECK-LABEL: @enum64
  67 #[no_mangle]
  68 pub fn enum64(a: Align64) -> Enum64 {
  69 // CHECK: %e64 = alloca %Enum64, align 64
  70     let e64 = Enum64::A(a);
  71     e64
  72 }