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use super::*;
use dep_graph::{DepGraph, DepKind, DepNodeIndex};
use hir::def_id::{LOCAL_CRATE, CrateNum};
use hir::intravisit::{Visitor, NestedVisitorMap};
use hir::svh::Svh;
use ich::Fingerprint;
use middle::cstore::CrateStore;
use session::CrateDisambiguator;
use std::iter::repeat;
use syntax::ast::{NodeId, CRATE_NODE_ID};
use syntax::codemap::CodeMap;
use syntax_pos::Span;
use ich::StableHashingContext;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher, StableHasherResult};
pub(super) struct NodeCollector<'a, 'hir> {
krate: &'hir Crate,
map: Vec<MapEntry<'hir>>,
parent_node: NodeId,
current_dep_node_owner: DefIndex,
current_signature_dep_index: DepNodeIndex,
current_full_dep_index: DepNodeIndex,
currently_in_body: bool,
dep_graph: &'a DepGraph,
definitions: &'a definitions::Definitions,
hcx: StableHashingContext<'a>,
hir_body_nodes: Vec<(DefPathHash, DepNodeIndex)>,
}
impl<'a, 'hir> NodeCollector<'a, 'hir> {
pub(super) fn root(krate: &'hir Crate,
dep_graph: &'a DepGraph,
definitions: &'a definitions::Definitions,
hcx: StableHashingContext<'a>)
-> NodeCollector<'a, 'hir> {
let root_mod_def_path_hash = definitions.def_path_hash(CRATE_DEF_INDEX);
let (root_mod_sig_dep_index, root_mod_full_dep_index);
{
let Crate {
ref module,
ref attrs,
span,
exported_macros: _,
items: _,
trait_items: _,
impl_items: _,
bodies: _,
trait_impls: _,
trait_auto_impl: _,
body_ids: _,
} = *krate;
root_mod_sig_dep_index = dep_graph.input_task(
root_mod_def_path_hash.to_dep_node(DepKind::Hir),
&hcx,
HirItemLike { item_like: (module, attrs, span), hash_bodies: false },
).1;
root_mod_full_dep_index = dep_graph.input_task(
root_mod_def_path_hash.to_dep_node(DepKind::HirBody),
&hcx,
HirItemLike { item_like: (module, attrs, span), hash_bodies: true },
).1;
}
{
dep_graph.input_task(
DepNode::new_no_params(DepKind::AllLocalTraitImpls),
&hcx,
&krate.trait_impls,
);
}
let hir_body_nodes = vec![(root_mod_def_path_hash, root_mod_full_dep_index)];
let mut collector = NodeCollector {
krate,
map: vec![],
parent_node: CRATE_NODE_ID,
current_signature_dep_index: root_mod_sig_dep_index,
current_full_dep_index: root_mod_full_dep_index,
current_dep_node_owner: CRATE_DEF_INDEX,
currently_in_body: false,
dep_graph,
definitions,
hcx,
hir_body_nodes,
};
collector.insert_entry(CRATE_NODE_ID, RootCrate(root_mod_sig_dep_index));
collector
}
pub(super) fn finalize_and_compute_crate_hash(mut self,
crate_disambiguator: CrateDisambiguator,
cstore: &dyn CrateStore,
codemap: &CodeMap,
commandline_args_hash: u64)
-> (Vec<MapEntry<'hir>>, Svh) {
self
.hir_body_nodes
.sort_unstable_by(|&(ref d1, _), &(ref d2, _)| d1.cmp(d2));
let node_hashes = self
.hir_body_nodes
.iter()
.fold(Fingerprint::ZERO, |fingerprint , &(def_path_hash, dep_node_index)| {
fingerprint.combine(
def_path_hash.0.combine(self.dep_graph.fingerprint_of(dep_node_index))
)
});
let mut upstream_crates: Vec<_> = cstore.crates_untracked().iter().map(|&cnum| {
let name = cstore.crate_name_untracked(cnum).as_str();
let disambiguator = cstore.crate_disambiguator_untracked(cnum)
.to_fingerprint();
let hash = cstore.crate_hash_untracked(cnum);
(name, disambiguator, hash)
}).collect();
upstream_crates.sort_unstable_by(|&(name1, dis1, _), &(name2, dis2, _)| {
(name1, dis1).cmp(&(name2, dis2))
});
let mut source_file_names: Vec<_> = codemap
.files()
.iter()
.filter(|filemap| CrateNum::from_u32(filemap.crate_of_origin) == LOCAL_CRATE)
.map(|filemap| filemap.name_hash)
.collect();
source_file_names.sort_unstable();
let (_, crate_dep_node_index) = self
.dep_graph
.input_task(DepNode::new_no_params(DepKind::Krate),
&self.hcx,
(((node_hashes, upstream_crates), source_file_names),
(commandline_args_hash,
crate_disambiguator.to_fingerprint())));
let svh = Svh::new(self.dep_graph
.fingerprint_of(crate_dep_node_index)
.to_smaller_hash());
(self.map, svh)
}
fn insert_entry(&mut self, id: NodeId, entry: MapEntry<'hir>) {
debug!("hir_map: {:?} => {:?}", id, entry);
let len = self.map.len();
if id.as_usize() >= len {
self.map.extend(repeat(NotPresent).take(id.as_usize() - len + 1));
}
self.map[id.as_usize()] = entry;
}
fn insert(&mut self, id: NodeId, node: Node<'hir>) {
let parent = self.parent_node;
let dep_node_index = if self.currently_in_body {
self.current_full_dep_index
} else {
self.current_signature_dep_index
};
let entry = match node {
NodeItem(n) => EntryItem(parent, dep_node_index, n),
NodeForeignItem(n) => EntryForeignItem(parent, dep_node_index, n),
NodeTraitItem(n) => EntryTraitItem(parent, dep_node_index, n),
NodeImplItem(n) => EntryImplItem(parent, dep_node_index, n),
NodeVariant(n) => EntryVariant(parent, dep_node_index, n),
NodeField(n) => EntryField(parent, dep_node_index, n),
NodeExpr(n) => EntryExpr(parent, dep_node_index, n),
NodeStmt(n) => EntryStmt(parent, dep_node_index, n),
NodeTy(n) => EntryTy(parent, dep_node_index, n),
NodeTraitRef(n) => EntryTraitRef(parent, dep_node_index, n),
NodeBinding(n) => EntryBinding(parent, dep_node_index, n),
NodePat(n) => EntryPat(parent, dep_node_index, n),
NodeBlock(n) => EntryBlock(parent, dep_node_index, n),
NodeStructCtor(n) => EntryStructCtor(parent, dep_node_index, n),
NodeLifetime(n) => EntryLifetime(parent, dep_node_index, n),
NodeTyParam(n) => EntryTyParam(parent, dep_node_index, n),
NodeVisibility(n) => EntryVisibility(parent, dep_node_index, n),
NodeLocal(n) => EntryLocal(parent, dep_node_index, n),
NodeMacroDef(n) => EntryMacroDef(dep_node_index, n),
};
if cfg!(debug_assertions) {
let hir_id_owner = self.definitions.node_to_hir_id(id).owner;
if hir_id_owner != self.current_dep_node_owner {
let node_str = match self.definitions.opt_def_index(id) {
Some(def_index) => {
self.definitions.def_path(def_index).to_string_no_crate()
}
None => format!("{:?}", node)
};
bug!("inconsistent DepNode for `{}`: \
current_dep_node_owner={}, hir_id.owner={}",
node_str,
self.definitions
.def_path(self.current_dep_node_owner)
.to_string_no_crate(),
self.definitions.def_path(hir_id_owner).to_string_no_crate())
}
}
self.insert_entry(id, entry);
}
fn with_parent<F: FnOnce(&mut Self)>(&mut self, parent_id: NodeId, f: F) {
let parent_node = self.parent_node;
self.parent_node = parent_id;
f(self);
self.parent_node = parent_node;
}
fn with_dep_node_owner<T: HashStable<StableHashingContext<'a>>,
F: FnOnce(&mut Self)>(&mut self,
dep_node_owner: DefIndex,
item_like: &T,
f: F) {
let prev_owner = self.current_dep_node_owner;
let prev_signature_dep_index = self.current_signature_dep_index;
let prev_full_dep_index = self.current_full_dep_index;
let prev_in_body = self.currently_in_body;
let def_path_hash = self.definitions.def_path_hash(dep_node_owner);
self.current_signature_dep_index = self.dep_graph.input_task(
def_path_hash.to_dep_node(DepKind::Hir),
&self.hcx,
HirItemLike { item_like, hash_bodies: false },
).1;
self.current_full_dep_index = self.dep_graph.input_task(
def_path_hash.to_dep_node(DepKind::HirBody),
&self.hcx,
HirItemLike { item_like, hash_bodies: true },
).1;
self.hir_body_nodes.push((def_path_hash, self.current_full_dep_index));
self.current_dep_node_owner = dep_node_owner;
self.currently_in_body = false;
f(self);
self.currently_in_body = prev_in_body;
self.current_dep_node_owner = prev_owner;
self.current_full_dep_index = prev_full_dep_index;
self.current_signature_dep_index = prev_signature_dep_index;
}
}
impl<'a, 'hir> Visitor<'hir> for NodeCollector<'a, 'hir> {
fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'hir> {
panic!("visit_nested_xxx must be manually implemented in this visitor")
}
fn visit_nested_item(&mut self, item: ItemId) {
debug!("visit_nested_item: {:?}", item);
self.visit_item(self.krate.item(item.id));
}
fn visit_nested_trait_item(&mut self, item_id: TraitItemId) {
self.visit_trait_item(self.krate.trait_item(item_id));
}
fn visit_nested_impl_item(&mut self, item_id: ImplItemId) {
self.visit_impl_item(self.krate.impl_item(item_id));
}
fn visit_nested_body(&mut self, id: BodyId) {
let prev_in_body = self.currently_in_body;
self.currently_in_body = true;
self.visit_body(self.krate.body(id));
self.currently_in_body = prev_in_body;
}
fn visit_item(&mut self, i: &'hir Item) {
debug!("visit_item: {:?}", i);
debug_assert_eq!(i.hir_id.owner,
self.definitions.opt_def_index(i.id).unwrap());
self.with_dep_node_owner(i.hir_id.owner, i, |this| {
this.insert(i.id, NodeItem(i));
this.with_parent(i.id, |this| {
match i.node {
ItemStruct(ref struct_def, _) => {
if !struct_def.is_struct() {
this.insert(struct_def.id(), NodeStructCtor(struct_def));
}
}
_ => {}
}
intravisit::walk_item(this, i);
});
});
}
fn visit_foreign_item(&mut self, foreign_item: &'hir ForeignItem) {
self.insert(foreign_item.id, NodeForeignItem(foreign_item));
self.with_parent(foreign_item.id, |this| {
intravisit::walk_foreign_item(this, foreign_item);
});
}
fn visit_generics(&mut self, generics: &'hir Generics) {
for ty_param in generics.ty_params() {
self.insert(ty_param.id, NodeTyParam(ty_param));
}
intravisit::walk_generics(self, generics);
}
fn visit_trait_item(&mut self, ti: &'hir TraitItem) {
debug_assert_eq!(ti.hir_id.owner,
self.definitions.opt_def_index(ti.id).unwrap());
self.with_dep_node_owner(ti.hir_id.owner, ti, |this| {
this.insert(ti.id, NodeTraitItem(ti));
this.with_parent(ti.id, |this| {
intravisit::walk_trait_item(this, ti);
});
});
}
fn visit_impl_item(&mut self, ii: &'hir ImplItem) {
debug_assert_eq!(ii.hir_id.owner,
self.definitions.opt_def_index(ii.id).unwrap());
self.with_dep_node_owner(ii.hir_id.owner, ii, |this| {
this.insert(ii.id, NodeImplItem(ii));
this.with_parent(ii.id, |this| {
intravisit::walk_impl_item(this, ii);
});
});
}
fn visit_pat(&mut self, pat: &'hir Pat) {
let node = if let PatKind::Binding(..) = pat.node {
NodeBinding(pat)
} else {
NodePat(pat)
};
self.insert(pat.id, node);
self.with_parent(pat.id, |this| {
intravisit::walk_pat(this, pat);
});
}
fn visit_expr(&mut self, expr: &'hir Expr) {
self.insert(expr.id, NodeExpr(expr));
self.with_parent(expr.id, |this| {
intravisit::walk_expr(this, expr);
});
}
fn visit_stmt(&mut self, stmt: &'hir Stmt) {
let id = stmt.node.id();
self.insert(id, NodeStmt(stmt));
self.with_parent(id, |this| {
intravisit::walk_stmt(this, stmt);
});
}
fn visit_ty(&mut self, ty: &'hir Ty) {
self.insert(ty.id, NodeTy(ty));
self.with_parent(ty.id, |this| {
intravisit::walk_ty(this, ty);
});
}
fn visit_trait_ref(&mut self, tr: &'hir TraitRef) {
self.insert(tr.ref_id, NodeTraitRef(tr));
self.with_parent(tr.ref_id, |this| {
intravisit::walk_trait_ref(this, tr);
});
}
fn visit_fn(&mut self, fk: intravisit::FnKind<'hir>, fd: &'hir FnDecl,
b: BodyId, s: Span, id: NodeId) {
assert_eq!(self.parent_node, id);
intravisit::walk_fn(self, fk, fd, b, s, id);
}
fn visit_block(&mut self, block: &'hir Block) {
self.insert(block.id, NodeBlock(block));
self.with_parent(block.id, |this| {
intravisit::walk_block(this, block);
});
}
fn visit_local(&mut self, l: &'hir Local) {
self.insert(l.id, NodeLocal(l));
self.with_parent(l.id, |this| {
intravisit::walk_local(this, l)
})
}
fn visit_lifetime(&mut self, lifetime: &'hir Lifetime) {
self.insert(lifetime.id, NodeLifetime(lifetime));
}
fn visit_vis(&mut self, visibility: &'hir Visibility) {
match *visibility {
Visibility::Public |
Visibility::Crate |
Visibility::Inherited => {}
Visibility::Restricted { id, .. } => {
self.insert(id, NodeVisibility(visibility));
self.with_parent(id, |this| {
intravisit::walk_vis(this, visibility);
});
}
}
}
fn visit_macro_def(&mut self, macro_def: &'hir MacroDef) {
let def_index = self.definitions.opt_def_index(macro_def.id).unwrap();
self.with_dep_node_owner(def_index, macro_def, |this| {
this.insert(macro_def.id, NodeMacroDef(macro_def));
});
}
fn visit_variant(&mut self, v: &'hir Variant, g: &'hir Generics, item_id: NodeId) {
let id = v.node.data.id();
self.insert(id, NodeVariant(v));
self.with_parent(id, |this| {
intravisit::walk_variant(this, v, g, item_id);
});
}
fn visit_struct_field(&mut self, field: &'hir StructField) {
self.insert(field.id, NodeField(field));
self.with_parent(field.id, |this| {
intravisit::walk_struct_field(this, field);
});
}
fn visit_trait_item_ref(&mut self, ii: &'hir TraitItemRef) {
let TraitItemRef {
id,
name: _,
kind: _,
span: _,
defaultness: _,
} = *ii;
self.visit_nested_trait_item(id);
}
fn visit_impl_item_ref(&mut self, ii: &'hir ImplItemRef) {
let ImplItemRef {
id,
name: _,
kind: _,
span: _,
vis: _,
defaultness: _,
} = *ii;
self.visit_nested_impl_item(id);
}
}
struct HirItemLike<T> {
item_like: T,
hash_bodies: bool,
}
impl<'a, 'hir, T> HashStable<StableHashingContext<'hir>> for HirItemLike<T>
where T: HashStable<StableHashingContext<'hir>>
{
fn hash_stable<W: StableHasherResult>(&self,
hcx: &mut StableHashingContext<'hir>,
hasher: &mut StableHasher<W>) {
hcx.while_hashing_hir_bodies(self.hash_bodies, |hcx| {
self.item_like.hash_stable(hcx, hasher);
});
}
}