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
|
//! This module contains `HashStable` implementations for various HIR data
//! types in no particular order.
use crate::ich::{NodeIdHashingMode, StableHashingContext};
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher, ToStableHashKey};
use rustc_hir as hir;
use rustc_hir::definitions::DefPathHash;
use smallvec::SmallVec;
use std::mem;
impl<'ctx> rustc_hir::HashStableContext for StableHashingContext<'ctx> {
#[inline]
fn hash_hir_id(&mut self, hir_id: hir::HirId, hasher: &mut StableHasher) {
let hcx = self;
match hcx.node_id_hashing_mode {
NodeIdHashingMode::Ignore => {
// Don't do anything.
}
NodeIdHashingMode::HashDefPath => {
let hir::HirId { owner, local_id } = hir_id;
hcx.local_def_path_hash(owner).hash_stable(hcx, hasher);
local_id.hash_stable(hcx, hasher);
}
}
}
fn hash_body_id(&mut self, id: hir::BodyId, hasher: &mut StableHasher) {
let hcx = self;
if hcx.hash_bodies() {
hcx.body_resolver.body(id).hash_stable(hcx, hasher);
}
}
fn hash_reference_to_item(&mut self, id: hir::HirId, hasher: &mut StableHasher) {
let hcx = self;
hcx.with_node_id_hashing_mode(NodeIdHashingMode::HashDefPath, |hcx| {
id.hash_stable(hcx, hasher);
})
}
fn hash_hir_mod(&mut self, module: &hir::Mod<'_>, hasher: &mut StableHasher) {
let hcx = self;
let hir::Mod { inner: ref inner_span, ref item_ids } = *module;
inner_span.hash_stable(hcx, hasher);
// Combining the `DefPathHash`s directly is faster than feeding them
// into the hasher. Because we use a commutative combine, we also don't
// have to sort the array.
let item_ids_hash = item_ids
.iter()
.map(|id| {
let def_path_hash = id.to_stable_hash_key(hcx);
def_path_hash.0
})
.fold(Fingerprint::ZERO, |a, b| a.combine_commutative(b));
item_ids.len().hash_stable(hcx, hasher);
item_ids_hash.hash_stable(hcx, hasher);
}
fn hash_hir_expr(&mut self, expr: &hir::Expr<'_>, hasher: &mut StableHasher) {
self.while_hashing_hir_bodies(true, |hcx| {
let hir::Expr { hir_id: _, ref span, ref kind } = *expr;
span.hash_stable(hcx, hasher);
kind.hash_stable(hcx, hasher);
})
}
fn hash_hir_ty(&mut self, ty: &hir::Ty<'_>, hasher: &mut StableHasher) {
self.while_hashing_hir_bodies(true, |hcx| {
let hir::Ty { hir_id: _, ref kind, ref span } = *ty;
kind.hash_stable(hcx, hasher);
span.hash_stable(hcx, hasher);
})
}
fn hash_hir_visibility_kind(
&mut self,
vis: &hir::VisibilityKind<'_>,
hasher: &mut StableHasher,
) {
let hcx = self;
mem::discriminant(vis).hash_stable(hcx, hasher);
match *vis {
hir::VisibilityKind::Public | hir::VisibilityKind::Inherited => {
// No fields to hash.
}
hir::VisibilityKind::Crate(sugar) => {
sugar.hash_stable(hcx, hasher);
}
hir::VisibilityKind::Restricted { ref path, hir_id } => {
hcx.with_node_id_hashing_mode(NodeIdHashingMode::HashDefPath, |hcx| {
hir_id.hash_stable(hcx, hasher);
});
path.hash_stable(hcx, hasher);
}
}
}
fn hash_hir_item_like<F: FnOnce(&mut Self)>(&mut self, f: F) {
let prev_hash_node_ids = self.node_id_hashing_mode;
self.node_id_hashing_mode = NodeIdHashingMode::Ignore;
f(self);
self.node_id_hashing_mode = prev_hash_node_ids;
}
}
impl<'a> HashStable<StableHashingContext<'a>> for hir::Body<'_> {
fn hash_stable(&self, hcx: &mut StableHashingContext<'a>, hasher: &mut StableHasher) {
let hir::Body { params, value, generator_kind } = self;
hcx.with_node_id_hashing_mode(NodeIdHashingMode::Ignore, |hcx| {
params.hash_stable(hcx, hasher);
value.hash_stable(hcx, hasher);
generator_kind.hash_stable(hcx, hasher);
});
}
}
impl<'a> HashStable<StableHashingContext<'a>> for hir::TraitCandidate {
fn hash_stable(&self, hcx: &mut StableHashingContext<'a>, hasher: &mut StableHasher) {
hcx.with_node_id_hashing_mode(NodeIdHashingMode::HashDefPath, |hcx| {
let hir::TraitCandidate { def_id, import_ids } = self;
def_id.hash_stable(hcx, hasher);
import_ids.hash_stable(hcx, hasher);
});
}
}
impl<'a> ToStableHashKey<StableHashingContext<'a>> for hir::TraitCandidate {
type KeyType = (DefPathHash, SmallVec<[DefPathHash; 1]>);
fn to_stable_hash_key(&self, hcx: &StableHashingContext<'a>) -> Self::KeyType {
let hir::TraitCandidate { def_id, import_ids } = self;
(
hcx.def_path_hash(*def_id),
import_ids.iter().map(|def_id| hcx.local_def_path_hash(*def_id)).collect(),
)
}
}
|
