1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
//@ run-pass
//! Test that users are able to use stable mir APIs to retrieve
//! discriminant value and type for AdtDef and Coroutine variants
//@ ignore-stage1
//@ ignore-cross-compile
//@ ignore-remote
//@ edition: 2024
#![feature(rustc_private)]
#![feature(assert_matches)]
extern crate rustc_middle;
extern crate rustc_driver;
extern crate rustc_interface;
#[macro_use]
extern crate rustc_public;
use std::io::Write;
use std::ops::ControlFlow;
use rustc_public::CrateItem;
use rustc_public::crate_def::CrateDef;
use rustc_public::mir::{AggregateKind, Rvalue, Statement, StatementKind};
use rustc_public::ty::{IntTy, RigidTy, Ty};
const CRATE_NAME: &str = "crate_variant_ty";
/// Test if we can retrieve discriminant info for different types.
fn test_def_tys() -> ControlFlow<()> {
check_adt_mono();
check_adt_poly();
check_adt_poly2();
ControlFlow::Continue(())
}
fn check_adt_mono() {
let mono = get_fn("mono").expect_body();
check_statement_is_aggregate_assign(
&mono.blocks[0].statements[0],
0,
RigidTy::Int(IntTy::Isize),
);
check_statement_is_aggregate_assign(
&mono.blocks[1].statements[0],
1,
RigidTy::Int(IntTy::Isize),
);
check_statement_is_aggregate_assign(
&mono.blocks[2].statements[0],
2,
RigidTy::Int(IntTy::Isize),
);
}
fn check_adt_poly() {
let poly = get_fn("poly").expect_body();
check_statement_is_aggregate_assign(
&poly.blocks[0].statements[0],
0,
RigidTy::Int(IntTy::Isize),
);
check_statement_is_aggregate_assign(
&poly.blocks[1].statements[0],
1,
RigidTy::Int(IntTy::Isize),
);
check_statement_is_aggregate_assign(
&poly.blocks[2].statements[0],
2,
RigidTy::Int(IntTy::Isize),
);
}
fn check_adt_poly2() {
let poly = get_fn("poly2").expect_body();
check_statement_is_aggregate_assign(
&poly.blocks[0].statements[0],
0,
RigidTy::Int(IntTy::Isize),
);
check_statement_is_aggregate_assign(
&poly.blocks[1].statements[0],
1,
RigidTy::Int(IntTy::Isize),
);
check_statement_is_aggregate_assign(
&poly.blocks[2].statements[0],
2,
RigidTy::Int(IntTy::Isize),
);
}
fn get_fn(name: &str) -> CrateItem {
rustc_public::all_local_items().into_iter().find(|it| it.name().eq(name)).unwrap()
}
fn check_statement_is_aggregate_assign(
statement: &Statement,
expected_discr_val: u128,
expected_discr_ty: RigidTy,
) {
if let Statement { kind: StatementKind::Assign(_, rvalue), .. } = statement
&& let Rvalue::Aggregate(aggregate, _) = rvalue
&& let AggregateKind::Adt(adt_def, variant_idx, ..) = aggregate
{
let discr = adt_def.discriminant_for_variant(*variant_idx);
assert_eq!(discr.val, expected_discr_val);
assert_eq!(discr.ty, Ty::from_rigid_kind(expected_discr_ty));
} else {
unreachable!("Unexpected statement");
}
}
/// This test will generate and analyze a dummy crate using the stable mir.
/// For that, it will first write the dummy crate into a file.
/// Then it will create a `RustcPublic` using custom arguments and then
/// it will run the compiler.
fn main() {
let path = "defs_ty_input.rs";
generate_input(&path).unwrap();
let args = &[
"rustc".to_string(),
"-Cpanic=abort".to_string(),
"--crate-name".to_string(),
CRATE_NAME.to_string(),
path.to_string(),
];
run!(args, test_def_tys).unwrap();
}
fn generate_input(path: &str) -> std::io::Result<()> {
let mut file = std::fs::File::create(path)?;
write!(
file,
r#"
use std::hint::black_box;
enum Mono {{
A,
B(i32),
C {{ a: i32, b: u32 }},
}}
enum Poly<T> {{
A,
B(T),
C {{ t: T }},
}}
pub fn main() {{
mono();
poly();
poly2::<i32>(1);
}}
fn mono() {{
black_box(Mono::A);
black_box(Mono::B(6));
black_box(Mono::C {{a: 1, b: 10 }});
}}
fn poly() {{
black_box(Poly::<i32>::A);
black_box(Poly::B(1i32));
black_box(Poly::C {{ t: 1i32 }});
}}
fn poly2<T: Copy>(t: T) {{
black_box(Poly::<T>::A);
black_box(Poly::B(t));
black_box(Poly::C {{ t: t }});
}}
"#
)?;
Ok(())
}
|
