src/test/codegen/stores.rs

   1 // compile-flags: -C no-prepopulate-passes
   2 //
   3
   4 #![crate_type = "lib"]
   5
   6 pub struct Bytes {
   7   a: u8,
   8   b: u8,
   9   c: u8,
  10   d: u8,
  11 }
  12
  13 // CHECK-LABEL: small_array_alignment
  14 // The array is stored as i32, but its alignment is lower, go with 1 byte to avoid target
  15 // dependent alignment
  16 #[no_mangle]
  17 pub fn small_array_alignment(x: &mut [i8; 4], y: [i8; 4]) {
  18 // CHECK: [[TMP:%.+]] = alloca i32
  19 // CHECK: %y = alloca [4 x i8]
  20 // CHECK: store i32 %0, {{i32\*|ptr}} [[TMP]]
  21 // CHECK: call void @llvm.memcpy.{{.*}}({{i8\*|ptr}} align 1 {{.+}}, {{i8\*|ptr}} align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
  22     *x = y;
  23 }
  24
  25 // CHECK-LABEL: small_struct_alignment
  26 // The struct is stored as i32, but its alignment is lower, go with 1 byte to avoid target
  27 // dependent alignment
  28 #[no_mangle]
  29 pub fn small_struct_alignment(x: &mut Bytes, y: Bytes) {
  30 // CHECK: [[TMP:%.+]] = alloca i32
  31 // CHECK: %y = alloca %Bytes
  32 // CHECK: store i32 %0, {{i32\*|ptr}} [[TMP]]
  33 // CHECK: call void @llvm.memcpy.{{.*}}({{i8\*|ptr}} align 1 {{.+}}, {{i8\*|ptr}} align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
  34     *x = y;
  35 }