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Merge two query callbacks arrays.

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This commit is contained in:
Camille GILLOT 2021-10-16 20:10:23 +02:00
parent dc7143367c
commit b09de95fab
12 changed files with 179 additions and 246 deletions
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40
compiler/rustc_incremental/src/assert_dep_graph.rs
View File

@ -126,30 +126,36 @@ impl IfThisChanged<'tcx> {
if attr.has_name(sym::rustc_if_this_changed) {
let dep_node_interned = self.argument(attr);
let dep_node = match dep_node_interned {
None => DepNode::from_def_path_hash(def_path_hash, DepKind::hir_owner),
Some(n) => match DepNode::from_label_string(&n.as_str(), def_path_hash) {
Ok(n) => n,
Err(()) => {
self.tcx.sess.span_fatal(
attr.span,
&format!("unrecognized DepNode variant {:?}", n),
);
None => {
DepNode::from_def_path_hash(self.tcx, def_path_hash, DepKind::hir_owner)
}
Some(n) => {
match DepNode::from_label_string(self.tcx, &n.as_str(), def_path_hash) {
Ok(n) => n,
Err(()) => {
self.tcx.sess.span_fatal(
attr.span,
&format!("unrecognized DepNode variant {:?}", n),
);
}
}
},
}
};
self.if_this_changed.push((attr.span, def_id.to_def_id(), dep_node));
} else if attr.has_name(sym::rustc_then_this_would_need) {
let dep_node_interned = self.argument(attr);
let dep_node = match dep_node_interned {
Some(n) => match DepNode::from_label_string(&n.as_str(), def_path_hash) {
Ok(n) => n,
Err(()) => {
self.tcx.sess.span_fatal(
attr.span,
&format!("unrecognized DepNode variant {:?}", n),
);
Some(n) => {
match DepNode::from_label_string(self.tcx, &n.as_str(), def_path_hash) {
Ok(n) => n,
Err(()) => {
self.tcx.sess.span_fatal(
attr.span,
&format!("unrecognized DepNode variant {:?}", n),
);
}
}
},
}
None => {
self.tcx.sess.span_fatal(attr.span, "missing DepNode variant");
}

21
compiler/rustc_incremental/src/persist/dirty_clean.rs
View File

@ -15,7 +15,7 @@
use rustc_ast::{self as ast, Attribute, NestedMetaItem};
use rustc_data_structures::fx::FxHashSet;
use rustc_hir as hir;
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_hir::def_id::LocalDefId;
use rustc_hir::intravisit;
use rustc_hir::itemlikevisit::ItemLikeVisitor;
use rustc_hir::Node as HirNode;
@ -302,18 +302,6 @@ impl DirtyCleanVisitor<'tcx> {
out
}
fn dep_nodes<'l>(
&self,
labels: &'l Labels,
def_id: DefId,
) -> impl Iterator<Item = DepNode> + 'l {
let def_path_hash = self.tcx.def_path_hash(def_id);
labels.iter().map(move |label| match DepNode::from_label_string(label, def_path_hash) {
Ok(dep_node) => dep_node,
Err(()) => unreachable!("label: {}", label),
})
}
fn dep_node_str(&self, dep_node: &DepNode) -> String {
if let Some(def_id) = dep_node.extract_def_id(self.tcx) {
format!("{:?}({})", dep_node.kind, self.tcx.def_path_str(def_id))
@ -345,16 +333,19 @@ impl DirtyCleanVisitor<'tcx> {
}
fn check_item(&mut self, item_id: LocalDefId, item_span: Span) {
let def_path_hash = self.tcx.def_path_hash(item_id.to_def_id());
for attr in self.tcx.get_attrs(item_id.to_def_id()).iter() {
let assertion = match self.assertion_maybe(item_id, attr) {
Some(a) => a,
None => continue,
};
self.checked_attrs.insert(attr.id);
for dep_node in self.dep_nodes(&assertion.clean, item_id.to_def_id()) {
for label in assertion.clean {
let dep_node = DepNode::from_label_string(self.tcx, &label, def_path_hash).unwrap();
self.assert_clean(item_span, dep_node);
}
for dep_node in self.dep_nodes(&assertion.dirty, item_id.to_def_id()) {
for label in assertion.dirty {
let dep_node = DepNode::from_label_string(self.tcx, &label, def_path_hash).unwrap();
self.assert_dirty(item_span, dep_node);
}
}

1
compiler/rustc_interface/src/passes.rs
View File

@ -838,6 +838,7 @@ pub fn create_global_ctxt<'tcx>(
dep_graph,
queries.on_disk_cache.as_ref().map(OnDiskCache::as_dyn),
queries.as_dyn(),
&rustc_query_impl::QUERY_CALLBACKS,
crate_name,
outputs,
)

184
compiler/rustc_middle/src/dep_graph/dep_node.rs
View File

@ -78,32 +78,70 @@ pub struct DepKindStruct {
/// Anonymous queries cannot be replayed from one compiler invocation to the next.
/// When their result is needed, it is recomputed. They are useful for fine-grained
/// dependency tracking, and caching within one compiler invocation.
pub(super) is_anon: bool,
pub is_anon: bool,
/// Eval-always queries do not track their dependencies, and are always recomputed, even if
/// their inputs have not changed since the last compiler invocation. The result is still
/// cached within one compiler invocation.
pub(super) is_eval_always: bool,
pub is_eval_always: bool,
/// Whether the query key can be recovered from the hashed fingerprint.
/// See [DepNodeParams] trait for the behaviour of each key type.
// FIXME: Make this a simple boolean once DepNodeParams::fingerprint_style
// can be made a specialized associated const.
fingerprint_style: fn() -> FingerprintStyle,
}
pub fingerprint_style: fn() -> FingerprintStyle,
impl std::ops::Deref for DepKind {
type Target = DepKindStruct;
fn deref(&self) -> &DepKindStruct {
&DEP_KINDS[*self as usize]
}
/// The red/green evaluation system will try to mark a specific DepNode in the
/// dependency graph as green by recursively trying to mark the dependencies of
/// that `DepNode` as green. While doing so, it will sometimes encounter a `DepNode`
/// where we don't know if it is red or green and we therefore actually have
/// to recompute its value in order to find out. Since the only piece of
/// information that we have at that point is the `DepNode` we are trying to
/// re-evaluate, we need some way to re-run a query from just that. This is what
/// `force_from_dep_node()` implements.
///
/// In the general case, a `DepNode` consists of a `DepKind` and an opaque
/// GUID/fingerprint that will uniquely identify the node. This GUID/fingerprint
/// is usually constructed by computing a stable hash of the query-key that the
/// `DepNode` corresponds to. Consequently, it is not in general possible to go
/// back from hash to query-key (since hash functions are not reversible). For
/// this reason `force_from_dep_node()` is expected to fail from time to time
/// because we just cannot find out, from the `DepNode` alone, what the
/// corresponding query-key is and therefore cannot re-run the query.
///
/// The system deals with this case letting `try_mark_green` fail which forces
/// the root query to be re-evaluated.
///
/// Now, if `force_from_dep_node()` would always fail, it would be pretty useless.
/// Fortunately, we can use some contextual information that will allow us to
/// reconstruct query-keys for certain kinds of `DepNode`s. In particular, we
/// enforce by construction that the GUID/fingerprint of certain `DepNode`s is a
/// valid `DefPathHash`. Since we also always build a huge table that maps every
/// `DefPathHash` in the current codebase to the corresponding `DefId`, we have
/// everything we need to re-run the query.
///
/// Take the `mir_promoted` query as an example. Like many other queries, it
/// just has a single parameter: the `DefId` of the item it will compute the
/// validated MIR for. Now, when we call `force_from_dep_node()` on a `DepNode`
/// with kind `MirValidated`, we know that the GUID/fingerprint of the `DepNode`
/// is actually a `DefPathHash`, and can therefore just look up the corresponding
/// `DefId` in `tcx.def_path_hash_to_def_id`.
///
/// When you implement a new query, it will likely have a corresponding new
/// `DepKind`, and you'll have to support it here in `force_from_dep_node()`. As
/// a rule of thumb, if your query takes a `DefId` or `LocalDefId` as sole parameter,
/// then `force_from_dep_node()` should not fail for it. Otherwise, you can just
/// add it to the "We don't have enough information to reconstruct..." group in
/// the match below.
pub force_from_dep_node: fn(tcx: TyCtxt<'_>, dep_node: &DepNode) -> bool,
/// Invoke a query to put the on-disk cached value in memory.
pub try_load_from_on_disk_cache: fn(TyCtxt<'_>, &DepNode),
}
impl DepKind {
#[inline(always)]
pub fn fingerprint_style(&self) -> FingerprintStyle {
pub fn fingerprint_style(self, tcx: TyCtxt<'_>) -> FingerprintStyle {
// Only fetch the DepKindStruct once.
let data: &DepKindStruct = &**self;
let data = tcx.query_kind(self);
if data.is_anon {
return FingerprintStyle::Opaque;
}
@ -112,94 +150,6 @@ impl DepKind {
}
}
macro_rules! is_anon_attr {
(anon) => {
true
};
($attr:ident) => {
false
};
}
macro_rules! is_eval_always_attr {
(eval_always) => {
true
};
($attr:ident) => {
false
};
}
macro_rules! contains_anon_attr {
($(($attr:ident $($attr_args:tt)* )),*) => ({$(is_anon_attr!($attr) | )* false});
}
macro_rules! contains_eval_always_attr {
($(($attr:ident $($attr_args:tt)* )),*) => ({$(is_eval_always_attr!($attr) | )* false});
}
#[allow(non_upper_case_globals)]
pub mod dep_kind {
use super::*;
use crate::ty::query::query_keys;
use rustc_query_system::dep_graph::FingerprintStyle;
// We use this for most things when incr. comp. is turned off.
pub const Null: DepKindStruct = DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Unit,
};
pub const TraitSelect: DepKindStruct = DepKindStruct {
is_anon: true,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Unit,
};
pub const CompileCodegenUnit: DepKindStruct = DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Opaque,
};
pub const CompileMonoItem: DepKindStruct = DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Opaque,
};
macro_rules! define_query_dep_kinds {
($(
[$($attrs:tt)*]
$variant:ident $(( $tuple_arg_ty:ty $(,)? ))*
,)*) => (
$(pub const $variant: DepKindStruct = {
const is_anon: bool = contains_anon_attr!($($attrs)*);
const is_eval_always: bool = contains_eval_always_attr!($($attrs)*);
#[inline(always)]
fn fingerprint_style() -> rustc_query_system::dep_graph::FingerprintStyle {
<query_keys::$variant<'_> as DepNodeParams<TyCtxt<'_>>>
::fingerprint_style()
}
DepKindStruct {
is_anon,
is_eval_always,
fingerprint_style,
}
};)*
);
}
rustc_dep_node_append!([define_query_dep_kinds!][]);
}
macro_rules! define_dep_nodes {
(<$tcx:tt>
$(
@ -212,9 +162,7 @@ macro_rules! define_dep_nodes {
($mod:ident) => {[ $(($mod::$variant),)* ]};
}
static DEP_KINDS: &[DepKindStruct] = &make_dep_kind_array!(dep_kind);
/// This enum serves as an index into the `DEP_KINDS` array.
/// This enum serves as an index into arrays built by `make_dep_kind_array`.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Encodable, Decodable)]
#[allow(non_camel_case_types)]
pub enum DepKind {
@ -280,7 +228,7 @@ pub trait DepNodeExt: Sized {
/// Construct a DepNode from the given DepKind and DefPathHash. This
/// method will assert that the given DepKind actually requires a
/// single DefId/DefPathHash parameter.
fn from_def_path_hash(def_path_hash: DefPathHash, kind: DepKind) -> Self;
fn from_def_path_hash(tcx: TyCtxt<'_>, def_path_hash: DefPathHash, kind: DepKind) -> Self;
/// Extracts the DefId corresponding to this DepNode. This will work
/// if two conditions are met:
@ -295,7 +243,11 @@ pub trait DepNodeExt: Sized {
fn extract_def_id(&self, tcx: TyCtxt<'_>) -> Option<DefId>;
/// Used in testing
fn from_label_string(label: &str, def_path_hash: DefPathHash) -> Result<Self, ()>;
fn from_label_string(
tcx: TyCtxt<'_>,
label: &str,
def_path_hash: DefPathHash,
) -> Result<Self, ()>;
/// Used in testing
fn has_label_string(label: &str) -> bool;
@ -305,8 +257,8 @@ impl DepNodeExt for DepNode {
/// Construct a DepNode from the given DepKind and DefPathHash. This
/// method will assert that the given DepKind actually requires a
/// single DefId/DefPathHash parameter.
fn from_def_path_hash(def_path_hash: DefPathHash, kind: DepKind) -> DepNode {
debug_assert!(kind.fingerprint_style() == FingerprintStyle::DefPathHash);
fn from_def_path_hash(tcx: TyCtxt<'_>, def_path_hash: DefPathHash, kind: DepKind) -> DepNode {
debug_assert!(kind.fingerprint_style(tcx) == FingerprintStyle::DefPathHash);
DepNode { kind, hash: def_path_hash.0.into() }
}
@ -321,7 +273,7 @@ impl DepNodeExt for DepNode {
/// refers to something from the previous compilation session that
/// has been removed.
fn extract_def_id(&self, tcx: TyCtxt<'tcx>) -> Option<DefId> {
if self.kind.fingerprint_style() == FingerprintStyle::DefPathHash {
if self.kind.fingerprint_style(tcx) == FingerprintStyle::DefPathHash {
Some(tcx.def_path_hash_to_def_id(DefPathHash(self.hash.into())))
} else {
None
@ -329,13 +281,19 @@ impl DepNodeExt for DepNode {
}
/// Used in testing
fn from_label_string(label: &str, def_path_hash: DefPathHash) -> Result<DepNode, ()> {
fn from_label_string(
tcx: TyCtxt<'_>,
label: &str,
def_path_hash: DefPathHash,
) -> Result<DepNode, ()> {
let kind = dep_kind_from_label_string(label)?;
match kind.fingerprint_style() {
match kind.fingerprint_style(tcx) {
FingerprintStyle::Opaque => Err(()),
FingerprintStyle::Unit => Ok(DepNode::new_no_params(kind)),
FingerprintStyle::DefPathHash => Ok(DepNode::from_def_path_hash(def_path_hash, kind)),
FingerprintStyle::Unit => Ok(DepNode::new_no_params(tcx, kind)),
FingerprintStyle::DefPathHash => {
Ok(DepNode::from_def_path_hash(tcx, def_path_hash, kind))
}
}
}

22
compiler/rustc_middle/src/dep_graph/mod.rs
View File

@ -12,7 +12,7 @@ pub use rustc_query_system::dep_graph::{
SerializedDepNodeIndex, WorkProduct, WorkProductId,
};
pub use dep_node::{label_strs, DepKind, DepNode, DepNodeExt};
pub use dep_node::{label_strs, DepKind, DepKindStruct, DepNode, DepNodeExt};
crate use dep_node::{make_compile_codegen_unit, make_compile_mono_item};
pub type DepGraph = rustc_query_system::dep_graph::DepGraph<DepKind>;
@ -24,16 +24,6 @@ pub type EdgeFilter = rustc_query_system::dep_graph::debug::EdgeFilter<DepKind>;
impl rustc_query_system::dep_graph::DepKind for DepKind {
const NULL: Self = DepKind::Null;
#[inline(always)]
fn fingerprint_style(&self) -> rustc_query_system::dep_graph::FingerprintStyle {
DepKind::fingerprint_style(self)
}
#[inline(always)]
fn is_eval_always(&self) -> bool {
self.is_eval_always
}
fn debug_node(node: &DepNode, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}(", node.kind)?;
@ -99,4 +89,14 @@ impl<'tcx> DepContext for TyCtxt<'tcx> {
fn sess(&self) -> &Session {
self.sess
}
#[inline(always)]
fn fingerprint_style(&self, kind: DepKind) -> rustc_query_system::dep_graph::FingerprintStyle {
kind.fingerprint_style(*self)
}
#[inline(always)]
fn is_eval_always(&self, kind: DepKind) -> bool {
self.query_kind(kind).is_eval_always
}
}

9
compiler/rustc_middle/src/ty/context.rs
View File

@ -1,7 +1,7 @@
//! Type context book-keeping.
use crate::arena::Arena;
use crate::dep_graph::DepGraph;
use crate::dep_graph::{DepGraph, DepKind, DepKindStruct};
use crate::hir::place::Place as HirPlace;
use crate::infer::canonical::{Canonical, CanonicalVarInfo, CanonicalVarInfos};
use crate::lint::{struct_lint_level, LintDiagnosticBuilder, LintLevelSource};
@ -1011,6 +1011,7 @@ pub struct GlobalCtxt<'tcx> {
pub queries: &'tcx dyn query::QueryEngine<'tcx>,
pub query_caches: query::QueryCaches<'tcx>,
query_kinds: &'tcx [DepKindStruct],
// Internal caches for metadata decoding. No need to track deps on this.
pub ty_rcache: Lock<FxHashMap<ty::CReaderCacheKey, Ty<'tcx>>>,
@ -1144,6 +1145,7 @@ impl<'tcx> TyCtxt<'tcx> {
dep_graph: DepGraph,
on_disk_cache: Option<&'tcx dyn OnDiskCache<'tcx>>,
queries: &'tcx dyn query::QueryEngine<'tcx>,
query_kinds: &'tcx [DepKindStruct],
crate_name: &str,
output_filenames: OutputFilenames,
) -> GlobalCtxt<'tcx> {
@ -1170,6 +1172,7 @@ impl<'tcx> TyCtxt<'tcx> {
on_disk_cache,
queries,
query_caches: query::QueryCaches::default(),
query_kinds,
ty_rcache: Default::default(),
pred_rcache: Default::default(),
selection_cache: Default::default(),
@ -1183,6 +1186,10 @@ impl<'tcx> TyCtxt<'tcx> {
}
}
pub fn query_kind(self, k: DepKind) -> &'tcx DepKindStruct {
&self.query_kinds[k as usize]
}
/// Constructs a `TyKind::Error` type and registers a `delay_span_bug` to ensure it gets used.
#[track_caller]
pub fn ty_error(self) -> Ty<'tcx> {

3
compiler/rustc_query_impl/src/lib.rs
View File

@ -19,7 +19,7 @@ extern crate tracing;
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_errors::DiagnosticBuilder;
use rustc_middle::dep_graph;
use rustc_middle::dep_graph::{self, DepKindStruct};
use rustc_middle::ty::query::{query_keys, query_storage, query_stored, query_values};
use rustc_middle::ty::query::{Providers, QueryEngine};
use rustc_middle::ty::{self, TyCtxt};
@ -29,7 +29,6 @@ use rustc_span::Span;
#[macro_use]
mod plumbing;
pub use plumbing::QueryCtxt;
use plumbing::QueryStruct;
use rustc_query_system::query::*;
mod stats;

98
compiler/rustc_query_impl/src/plumbing.rs
View File

@ -55,7 +55,7 @@ impl QueryContext for QueryCtxt<'tcx> {
fn try_load_from_on_disk_cache(&self, dep_node: &DepNode) {
let cb = &super::QUERY_CALLBACKS[dep_node.kind as usize];
(cb.try_load_from_on_disk_cache)(*self, dep_node)
(cb.try_load_from_on_disk_cache)(**self, dep_node)
}
fn try_force_from_dep_node(&self, dep_node: &DepNode) -> bool {
@ -80,7 +80,7 @@ impl QueryContext for QueryCtxt<'tcx> {
);
let cb = &super::QUERY_CALLBACKS[dep_node.kind as usize];
(cb.force_from_dep_node)(*self, dep_node)
(cb.force_from_dep_node)(**self, dep_node)
}
// Interactions with on_disk_cache
@ -193,60 +193,6 @@ impl<'tcx> QueryCtxt<'tcx> {
}
}
/// This struct stores metadata about each Query.
///
/// Information is retrieved by indexing the `QUERIES` array using the integer value
/// of the `DepKind`. Overall, this allows to implement `QueryContext` using this manual
/// jump table instead of large matches.
pub struct QueryStruct {
/// The red/green evaluation system will try to mark a specific DepNode in the
/// dependency graph as green by recursively trying to mark the dependencies of
/// that `DepNode` as green. While doing so, it will sometimes encounter a `DepNode`
/// where we don't know if it is red or green and we therefore actually have
/// to recompute its value in order to find out. Since the only piece of
/// information that we have at that point is the `DepNode` we are trying to
/// re-evaluate, we need some way to re-run a query from just that. This is what
/// `force_from_dep_node()` implements.
///
/// In the general case, a `DepNode` consists of a `DepKind` and an opaque
/// GUID/fingerprint that will uniquely identify the node. This GUID/fingerprint
/// is usually constructed by computing a stable hash of the query-key that the
/// `DepNode` corresponds to. Consequently, it is not in general possible to go
/// back from hash to query-key (since hash functions are not reversible). For
/// this reason `force_from_dep_node()` is expected to fail from time to time
/// because we just cannot find out, from the `DepNode` alone, what the
/// corresponding query-key is and therefore cannot re-run the query.
///
/// The system deals with this case letting `try_mark_green` fail which forces
/// the root query to be re-evaluated.
///
/// Now, if `force_from_dep_node()` would always fail, it would be pretty useless.
/// Fortunately, we can use some contextual information that will allow us to
/// reconstruct query-keys for certain kinds of `DepNode`s. In particular, we
/// enforce by construction that the GUID/fingerprint of certain `DepNode`s is a
/// valid `DefPathHash`. Since we also always build a huge table that maps every
/// `DefPathHash` in the current codebase to the corresponding `DefId`, we have
/// everything we need to re-run the query.
///
/// Take the `mir_promoted` query as an example. Like many other queries, it
/// just has a single parameter: the `DefId` of the item it will compute the
/// validated MIR for. Now, when we call `force_from_dep_node()` on a `DepNode`
/// with kind `MirValidated`, we know that the GUID/fingerprint of the `DepNode`
/// is actually a `DefPathHash`, and can therefore just look up the corresponding
/// `DefId` in `tcx.def_path_hash_to_def_id`.
///
/// When you implement a new query, it will likely have a corresponding new
/// `DepKind`, and you'll have to support it here in `force_from_dep_node()`. As
/// a rule of thumb, if your query takes a `DefId` or `LocalDefId` as sole parameter,
/// then `force_from_dep_node()` should not fail for it. Otherwise, you can just
/// add it to the "We don't have enough information to reconstruct..." group in
/// the match below.
pub(crate) force_from_dep_node: fn(tcx: QueryCtxt<'_>, dep_node: &DepNode) -> bool,
/// Invoke a query to put the on-disk cached value in memory.
pub(crate) try_load_from_on_disk_cache: fn(QueryCtxt<'_>, &DepNode),
}
macro_rules! handle_cycle_error {
([][$tcx: expr, $error:expr]) => {{
$error.emit();
@ -425,28 +371,45 @@ macro_rules! define_queries {
use rustc_query_system::dep_graph::FingerprintStyle;
// We use this for most things when incr. comp. is turned off.
pub const Null: QueryStruct = QueryStruct {
pub const Null: DepKindStruct = DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Unit,
force_from_dep_node: |_, dep_node| bug!("force_from_dep_node: encountered {:?}", dep_node),
try_load_from_on_disk_cache: |_, _| {},
};
pub const TraitSelect: QueryStruct = QueryStruct {
pub const TraitSelect: DepKindStruct = DepKindStruct {
is_anon: true,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Unit,
force_from_dep_node: |_, _| false,
try_load_from_on_disk_cache: |_, _| {},
};
pub const CompileCodegenUnit: QueryStruct = QueryStruct {
pub const CompileCodegenUnit: DepKindStruct = DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Opaque,
force_from_dep_node: |_, _| false,
try_load_from_on_disk_cache: |_, _| {},
};
pub const CompileMonoItem: QueryStruct = QueryStruct {
pub const CompileMonoItem: DepKindStruct = DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: || FingerprintStyle::Opaque,
force_from_dep_node: |_, _| false,
try_load_from_on_disk_cache: |_, _| {},
};
$(pub const $name: QueryStruct = {
$(pub const $name: DepKindStruct = {
const is_anon: bool = is_anon!([$($modifiers)*]);
const is_eval_always: bool = is_eval_always!([$($modifiers)*]);
#[inline(always)]
fn fingerprint_style() -> FingerprintStyle {
@ -458,11 +421,13 @@ macro_rules! define_queries {
<query_keys::$name<'_> as DepNodeParams<TyCtxt<'_>>>::recover(tcx, dep_node)
}
fn force_from_dep_node(tcx: QueryCtxt<'_>, dep_node: &DepNode) -> bool {
fn force_from_dep_node(tcx: TyCtxt<'_>, dep_node: &DepNode) -> bool {
let tcx = QueryCtxt::from_tcx(tcx);
force_query::<queries::$name<'_>, _>(tcx, dep_node)
}
fn try_load_from_on_disk_cache(tcx: QueryCtxt<'_>, dep_node: &DepNode) {
fn try_load_from_on_disk_cache(tcx: TyCtxt<'_>, dep_node: &DepNode) {
let tcx = QueryCtxt::from_tcx(tcx);
if is_anon {
return
}
@ -479,14 +444,17 @@ macro_rules! define_queries {
}
}
QueryStruct {
DepKindStruct {
is_anon,
is_eval_always,
fingerprint_style,
force_from_dep_node,
try_load_from_on_disk_cache,
}
};)*
}
static QUERY_CALLBACKS: &[QueryStruct] = &make_dep_kind_array!(query_callbacks);
pub static QUERY_CALLBACKS: &[DepKindStruct] = &make_dep_kind_array!(query_callbacks);
}
}

9
compiler/rustc_query_system/src/dep_graph/dep_node.rs
View File

@ -60,8 +60,11 @@ impl<K: DepKind> DepNode<K> {
/// Creates a new, parameterless DepNode. This method will assert
/// that the DepNode corresponding to the given DepKind actually
/// does not require any parameters.
pub fn new_no_params(kind: K) -> DepNode<K> {
debug_assert_eq!(kind.fingerprint_style(), FingerprintStyle::Unit);
pub fn new_no_params<Ctxt>(tcx: Ctxt, kind: K) -> DepNode<K>
where
Ctxt: super::DepContext<DepKind = K>,
{
debug_assert_eq!(tcx.fingerprint_style(kind), FingerprintStyle::Unit);
DepNode { kind, hash: Fingerprint::ZERO.into() }
}
@ -75,7 +78,7 @@ impl<K: DepKind> DepNode<K> {
#[cfg(debug_assertions)]
{
if !kind.fingerprint_style().reconstructible()
if !tcx.fingerprint_style(kind).reconstructible()
&& (tcx.sess().opts.debugging_opts.incremental_info
|| tcx.sess().opts.debugging_opts.query_dep_graph)
{

10
compiler/rustc_query_system/src/dep_graph/graph.rs
View File

@ -252,7 +252,7 @@ impl<K: DepKind> DepGraph<K> {
key
);
let task_deps = if key.kind.is_eval_always() {
let task_deps = if cx.dep_context().is_eval_always(key.kind) {
None
} else {
Some(Lock::new(TaskDeps {
@ -316,7 +316,7 @@ impl<K: DepKind> DepGraph<K> {
where
OP: FnOnce() -> R,
{
debug_assert!(!dep_kind.is_eval_always());
debug_assert!(!cx.is_eval_always(dep_kind));
if let Some(ref data) = self.data {
let task_deps = Lock::new(TaskDeps::default());
@ -493,7 +493,7 @@ impl<K: DepKind> DepGraph<K> {
tcx: Ctxt,
dep_node: &DepNode<K>,
) -> Option<(SerializedDepNodeIndex, DepNodeIndex)> {
debug_assert!(!dep_node.kind.is_eval_always());
debug_assert!(!tcx.dep_context().is_eval_always(dep_node.kind));
// Return None if the dep graph is disabled
let data = self.data.as_ref()?;
@ -553,7 +553,7 @@ impl<K: DepKind> DepGraph<K> {
// We don't know the state of this dependency. If it isn't
// an eval_always node, let's try to mark it green recursively.
if !dep_dep_node.kind.is_eval_always() {
if !tcx.dep_context().is_eval_always(dep_dep_node.kind) {
debug!(
"try_mark_previous_green({:?}) --- state of dependency {:?} ({}) \
is unknown, trying to mark it green",
@ -643,7 +643,7 @@ impl<K: DepKind> DepGraph<K> {
}
// We never try to mark eval_always nodes as green
debug_assert!(!dep_node.kind.is_eval_always());
debug_assert!(!tcx.dep_context().is_eval_always(dep_node.kind));
debug_assert_eq!(data.previous.index_to_node(prev_dep_node_index), *dep_node);

10
compiler/rustc_query_system/src/dep_graph/mod.rs
View File

@ -32,6 +32,11 @@ pub trait DepContext: Copy {
/// Access the compiler session.
fn sess(&self) -> &Session;
/// Return whether this kind always require evaluation.
fn is_eval_always(&self, kind: Self::DepKind) -> bool;
fn fingerprint_style(&self, kind: Self::DepKind) -> FingerprintStyle;
}
pub trait HasDepContext: Copy {
@ -75,9 +80,6 @@ impl FingerprintStyle {
pub trait DepKind: Copy + fmt::Debug + Eq + Hash + Send + Encodable<FileEncoder> + 'static {
const NULL: Self;
/// Return whether this kind always require evaluation.
fn is_eval_always(&self) -> bool;
/// Implementation of `std::fmt::Debug` for `DepNode`.
fn debug_node(node: &DepNode<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result;
@ -90,6 +92,4 @@ pub trait DepKind: Copy + fmt::Debug + Eq + Hash + Send + Encodable<FileEncoder>
fn read_deps<OP>(op: OP)
where
OP: for<'a> FnOnce(Option<&'a Lock<TaskDeps<Self>>>);
fn fingerprint_style(&self) -> FingerprintStyle;
}

18
compiler/rustc_query_system/src/query/plumbing.rs
View File

@ -2,7 +2,7 @@
//! generate the actual methods on tcx which find and execute the provider,
//! manage the caches, and so forth.
use crate::dep_graph::{DepContext, DepKind, DepNode, DepNodeIndex, DepNodeParams};
use crate::dep_graph::{DepContext, DepNode, DepNodeIndex, DepNodeParams};
use crate::query::caches::QueryCache;
use crate::query::config::{QueryDescription, QueryVtable, QueryVtableExt};
use crate::query::job::{
@ -520,14 +520,6 @@ where
let result = query.try_load_from_disk(tcx, prev_dep_node_index);
prof_timer.finish_with_query_invocation_id(dep_node_index.into());
// We always expect to find a cached result for things that
// can be forced from `DepNode`.
debug_assert!(
!dep_node.kind.fingerprint_style().reconstructible() || result.is_some(),
"missing on-disk cache entry for {:?}",
dep_node
);
if let Some(result) = result {
// If `-Zincremental-verify-ich` is specified, re-hash results from
// the cache and make sure that they have the expected fingerprint.
@ -537,6 +529,14 @@ where
return Some((result, dep_node_index));
}
// We always expect to find a cached result for things that
// can be forced from `DepNode`.
debug_assert!(
!tcx.dep_context().fingerprint_style(dep_node.kind).reconstructible(),
"missing on-disk cache entry for {:?}",
dep_node
);
}
// We could not load a result from the on-disk cache, so