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
|
// MIR for `f` after built
fn f() -> () {
let mut _0: ();
let mut _1: !;
let _2: std::string::String;
let _6: ();
let mut _7: std::string::String;
scope 1 {
debug _a => _2;
let _3: i32;
scope 2 {
debug _b => _3;
let _4: std::string::String;
scope 3 {
debug _c => _4;
let _5: std::string::String;
scope 4 {
debug _d => _5;
}
}
}
}
bb0: {
StorageLive(_2);
_2 = String::new() -> [return: bb1, unwind: bb17];
}
bb1: {
FakeRead(ForLet(None), _2);
StorageLive(_3);
_3 = const 12_i32;
FakeRead(ForLet(None), _3);
StorageLive(_4);
_4 = String::new() -> [return: bb2, unwind: bb16];
}
bb2: {
FakeRead(ForLet(None), _4);
StorageLive(_5);
_5 = String::new() -> [return: bb3, unwind: bb15];
}
bb3: {
FakeRead(ForLet(None), _5);
StorageLive(_6);
StorageLive(_7);
_7 = move _4;
_6 = std::mem::drop::<String>(move _7) -> [return: bb4, unwind: bb13];
}
bb4: {
StorageDead(_7);
StorageDead(_6);
drop(_5) -> [return: bb5, unwind: bb15];
}
bb5: {
StorageDead(_5);
drop(_4) -> [return: bb6, unwind: bb16];
}
bb6: {
StorageDead(_4);
drop(_2) -> [return: bb7, unwind: bb17];
}
bb7: {
StorageDead(_2);
tailcall g();
}
bb8: {
drop(_5) -> [return: bb9, unwind: bb15];
}
bb9: {
StorageDead(_5);
drop(_4) -> [return: bb10, unwind: bb16];
}
bb10: {
StorageDead(_4);
StorageDead(_3);
drop(_2) -> [return: bb11, unwind: bb17];
}
bb11: {
StorageDead(_2);
unreachable;
}
bb12: {
return;
}
bb13 (cleanup): {
drop(_7) -> [return: bb14, unwind terminate(cleanup)];
}
bb14 (cleanup): {
drop(_5) -> [return: bb15, unwind terminate(cleanup)];
}
bb15 (cleanup): {
drop(_4) -> [return: bb16, unwind terminate(cleanup)];
}
bb16 (cleanup): {
drop(_2) -> [return: bb17, unwind terminate(cleanup)];
}
bb17 (cleanup): {
resume;
}
}
|
