New upstream version 1.63.0+dfsg1

[rustc.git] / src / test / codegen / stores.rs

// compile-flags: -C no-prepopulate-passes
//

#![crate_type = "lib"]

pub struct Bytes {
  a: u8,
  b: u8,
  c: u8,
  d: u8,
}

// CHECK-LABEL: small_array_alignment
// The array is stored as i32, but its alignment is lower, go with 1 byte to avoid target
// dependent alignment
#[no_mangle]
pub fn small_array_alignment(x: &mut [i8; 4], y: [i8; 4]) {
// CHECK: [[TMP:%.+]] = alloca i32
// CHECK: %y = alloca [4 x i8]
// CHECK: store i32 %0, {{i32\*|ptr}} [[TMP]]
// CHECK: call void @llvm.memcpy.{{.*}}({{i8\*|ptr}} align 1 {{.+}}, {{i8\*|ptr}} align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
    *x = y;
}

// CHECK-LABEL: small_struct_alignment
// The struct is stored as i32, but its alignment is lower, go with 1 byte to avoid target
// dependent alignment
#[no_mangle]
pub fn small_struct_alignment(x: &mut Bytes, y: Bytes) {
// CHECK: [[TMP:%.+]] = alloca i32
// CHECK: %y = alloca %Bytes
// CHECK: store i32 %0, {{i32\*|ptr}} [[TMP]]
// CHECK: call void @llvm.memcpy.{{.*}}({{i8\*|ptr}} align 1 {{.+}}, {{i8\*|ptr}} align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
    *x = y;
}