src/test/codegen/repr-transparent-aggregates-2.rs

   1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // compile-flags: -C no-prepopulate-passes
  12
  13 // ignore-aarch64
  14 // ignore-asmjs
  15 // ignore-s390x
  16 // ignore-wasm
  17 // ignore-x86
  18 // ignore-x86_64
  19 // See repr-transparent.rs
  20
  21 #![crate_type="lib"]
  22 #![feature(repr_transparent)]
  23
  24
  25 #[repr(C)]
  26 pub struct Big([u32; 16]);
  27
  28 #[repr(transparent)]
  29 pub struct BigW(Big);
  30
  31 // CHECK: define void @test_Big(%Big* [[BIG_RET_ATTRS:.*]], [16 x i32]
  32 #[no_mangle]
  33 pub extern fn test_Big(_: Big) -> Big { loop {} }
  34
  35 // CHECK: define void @test_BigW(%BigW* [[BIG_RET_ATTRS]], [16 x i32]
  36 #[no_mangle]
  37 pub extern fn test_BigW(_: BigW) -> BigW { loop {} }
  38
  39
  40 #[repr(C)]
  41 pub union BigU {
  42     foo: [u32; 16],
  43 }
  44
  45 #[repr(transparent)]
  46 pub struct BigUw(BigU);
  47
  48 // CHECK: define void @test_BigU(%BigU* [[BIGU_RET_ATTRS:.*]], [16 x i32]
  49 #[no_mangle]
  50 pub extern fn test_BigU(_: BigU) -> BigU { loop {} }
  51
  52 // CHECK: define void @test_BigUw(%BigUw* [[BIGU_RET_ATTRS]], [16 x i32]
  53 #[no_mangle]
  54 pub extern fn test_BigUw(_: BigUw) -> BigUw { loop {} }