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1 // Copyright 2015 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 #![crate_type = "lib"]
14 #![feature(rustc_attrs)]
15
16 // Below, these constants are defined as enum variants that by itself would
17 // have a lower alignment than the enum type. Ensure that we mark them
18 // correctly with the higher alignment of the enum.
19
20 // CHECK: @STATIC = {{.*}}, align 4
21
22 // This checks the constants from inline_enum_const
23 // CHECK: @const{{[0-9]+}} = {{.*}}, align 2
24
25 // This checks the constants from {low,high}_align_const, they share the same
26 // constant, but the alignment differs, so the higher one should be used
27 // CHECK: @const{{[0-9]+}} = {{.*}}, align 4
28
29 #[derive(Copy, Clone)]
30
31 // repr(i16) is required for the {low,high}_align_const test
32 #[repr(i16)]
33 pub enum E<A, B> {
34 A(A),
35 B(B),
36 }
37
38 #[no_mangle]
39 pub static STATIC: E<i16, i32> = E::A(0);
40
41 // CHECK-LABEL: @static_enum_const
42 #[no_mangle]
43 #[rustc_no_mir] // FIXME #27840 MIR has different codegen.
44 pub fn static_enum_const() -> E<i16, i32> {
45 STATIC
46 }
47
48 // CHECK-LABEL: @inline_enum_const
49 #[no_mangle]
50 #[rustc_no_mir] // FIXME #27840 MIR has different codegen.
51 pub fn inline_enum_const() -> E<i8, i16> {
52 E::A(0)
53 }
54
55 // CHECK-LABEL: @low_align_const
56 #[no_mangle]
57 #[rustc_no_mir] // FIXME #27840 MIR has different codegen.
58 pub fn low_align_const() -> E<i16, [i16; 3]> {
59 // Check that low_align_const and high_align_const use the same constant
60 // CHECK: call void @llvm.memcpy.{{.*}}(i8* %{{[0-9]+}}, i8* {{.*}} [[LOW_HIGH:@const[0-9]+]]
61 E::A(0)
62 }
63
64 // CHECK-LABEL: @high_align_const
65 #[no_mangle]
66 #[rustc_no_mir] // FIXME #27840 MIR has different codegen.
67 pub fn high_align_const() -> E<i16, i32> {
68 // Check that low_align_const and high_align_const use the same constant
69 // CHECK: call void @llvm.memcpy.{{.*}}(i8* %{{[0-9]}}, i8* {{.*}} [[LOW_HIGH]]
70 E::A(0)
71 }