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Auto merge of #105220 - oli-obk:feeding, r=cjgillot

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feed resolver_for_lowering instead of storing it in a field

r? `@cjgillot`

opening this as

* a discussion for `no_hash` + `feedable` queries. I think we'll want those, but I don't quite understand why they are rejected beyond a double check of the stable hashes for situations where the query is fed but also read from incremental caches.
* and a discussion on removing all untracked fields from TyCtxt and setting it up so that they are fed queries instead
This commit is contained in:
bors 2022-12-06 03:47:41 +00:00
commit ed61c139c2
11 changed files with 86 additions and 57 deletions
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23
compiler/rustc_interface/src/passes.rs
View File

@ -12,6 +12,7 @@ use rustc_ast::{self as ast, visit};
use rustc_borrowck as mir_borrowck;
use rustc_codegen_ssa::traits::CodegenBackend;
use rustc_data_structures::parallel;
use rustc_data_structures::steal::Steal;
use rustc_data_structures::sync::{Lrc, OnceCell, WorkerLocal};
use rustc_errors::{ErrorGuaranteed, PResult};
use rustc_expand::base::{ExtCtxt, LintStoreExpand, ResolverExpand};
@ -801,6 +802,12 @@ pub fn create_global_ctxt<'tcx>(
TcxQueries::new(local_providers, extern_providers, query_result_on_disk_cache)
});
let ty::ResolverOutputs {
definitions,
global_ctxt: untracked_resolutions,
ast_lowering: untracked_resolver_for_lowering,
} = resolver_outputs;
let gcx = sess.time("setup_global_ctxt", || {
global_ctxt.get_or_init(move || {
TyCtxt::create_global_ctxt(
@ -808,7 +815,8 @@ pub fn create_global_ctxt<'tcx>(
lint_store,
arena,
hir_arena,
resolver_outputs,
definitions,
untracked_resolutions,
krate,
dep_graph,
queries.on_disk_cache.as_ref().map(OnDiskCache::as_dyn),
@ -820,7 +828,12 @@ pub fn create_global_ctxt<'tcx>(
})
});
QueryContext { gcx }
let mut qcx = QueryContext { gcx };
qcx.enter(|tcx| {
tcx.feed_unit_query()
.resolver_for_lowering(tcx.arena.alloc(Steal::new(untracked_resolver_for_lowering)))
});
qcx
}
/// Runs the resolution, type-checking, region checking and other
@ -965,12 +978,10 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
pub fn start_codegen<'tcx>(
codegen_backend: &dyn CodegenBackend,
tcx: TyCtxt<'tcx>,
outputs: &OutputFilenames,
) -> Box<dyn Any> {
info!("Pre-codegen\n{:?}", tcx.debug_stats());
let (metadata, need_metadata_module) =
rustc_metadata::fs::encode_and_write_metadata(tcx, outputs);
let (metadata, need_metadata_module) = rustc_metadata::fs::encode_and_write_metadata(tcx);
let codegen = tcx.sess.time("codegen_crate", move || {
codegen_backend.codegen_crate(tcx, metadata, need_metadata_module)
@ -986,7 +997,7 @@ pub fn start_codegen<'tcx>(
info!("Post-codegen\n{:?}", tcx.debug_stats());
if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) {
if let Err(error) = rustc_mir_transform::dump_mir::emit_mir(tcx, outputs) {
if let Err(error) = rustc_mir_transform::dump_mir::emit_mir(tcx) {
tcx.sess.emit_err(CantEmitMIR { error });
tcx.sess.abort_if_errors();
}

14
compiler/rustc_interface/src/queries.rs
View File

@ -20,6 +20,7 @@ use rustc_span::symbol::sym;
use std::any::Any;
use std::cell::{Ref, RefCell, RefMut};
use std::rc::Rc;
use std::sync::Arc;
/// Represent the result of a query.
///
@ -214,7 +215,7 @@ impl<'tcx> Queries<'tcx> {
pub fn global_ctxt(&'tcx self) -> Result<&Query<QueryContext<'tcx>>> {
self.global_ctxt.compute(|| {
let crate_name = self.crate_name()?.peek().clone();
let outputs = self.prepare_outputs()?.peek().clone();
let outputs = self.prepare_outputs()?.take();
let dep_graph = self.dep_graph()?.peek().clone();
let (krate, resolver, lint_store) = self.expansion()?.take();
Ok(passes::create_global_ctxt(
@ -235,7 +236,6 @@ impl<'tcx> Queries<'tcx> {
pub fn ongoing_codegen(&'tcx self) -> Result<&Query<Box<dyn Any>>> {
self.ongoing_codegen.compute(|| {
let outputs = self.prepare_outputs()?;
self.global_ctxt()?.peek_mut().enter(|tcx| {
tcx.analysis(()).ok();
@ -249,7 +249,7 @@ impl<'tcx> Queries<'tcx> {
// Hook for UI tests.
Self::check_for_rustc_errors_attr(tcx);
Ok(passes::start_codegen(&***self.codegen_backend(), tcx, &*outputs.peek()))
Ok(passes::start_codegen(&***self.codegen_backend(), tcx))
})
})
}
@ -293,8 +293,10 @@ impl<'tcx> Queries<'tcx> {
let codegen_backend = self.codegen_backend().clone();
let dep_graph = self.dep_graph()?.peek().clone();
let prepare_outputs = self.prepare_outputs()?.take();
let crate_hash = self.global_ctxt()?.peek_mut().enter(|tcx| tcx.crate_hash(LOCAL_CRATE));
let (crate_hash, prepare_outputs) = self
.global_ctxt()?
.peek_mut()
.enter(|tcx| (tcx.crate_hash(LOCAL_CRATE), tcx.output_filenames(()).clone()));
let ongoing_codegen = self.ongoing_codegen()?.take();
Ok(Linker {
@ -316,7 +318,7 @@ pub struct Linker {
// compilation outputs
dep_graph: DepGraph,
prepare_outputs: OutputFilenames,
prepare_outputs: Arc<OutputFilenames>,
crate_hash: Svh,
ongoing_codegen: Box<dyn Any>,
}

4
compiler/rustc_macros/src/query.rs
View File

@ -364,10 +364,6 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
modifiers.eval_always.is_none(),
"Query {name} cannot be both `feedable` and `eval_always`."
);
assert!(
modifiers.no_hash.is_none(),
"Query {name} cannot be both `feedable` and `no_hash`."
);
feedable_queries.extend(quote! {
#(#doc_comments)*
[#attribute_stream] fn #name(#arg) #result,

10
compiler/rustc_metadata/src/fs.rs
View File

@ -6,7 +6,7 @@ use crate::{encode_metadata, EncodedMetadata};
use rustc_data_structures::temp_dir::MaybeTempDir;
use rustc_hir::def_id::LOCAL_CRATE;
use rustc_middle::ty::TyCtxt;
use rustc_session::config::{CrateType, OutputFilenames, OutputType};
use rustc_session::config::{CrateType, OutputType};
use rustc_session::output::filename_for_metadata;
use rustc_session::Session;
use tempfile::Builder as TempFileBuilder;
@ -38,10 +38,7 @@ pub fn emit_wrapper_file(
out_filename
}
pub fn encode_and_write_metadata(
tcx: TyCtxt<'_>,
outputs: &OutputFilenames,
) -> (EncodedMetadata, bool) {
pub fn encode_and_write_metadata(tcx: TyCtxt<'_>) -> (EncodedMetadata, bool) {
#[derive(PartialEq, Eq, PartialOrd, Ord)]
enum MetadataKind {
None,
@ -64,7 +61,8 @@ pub fn encode_and_write_metadata(
.unwrap_or(MetadataKind::None);
let crate_name = tcx.crate_name(LOCAL_CRATE);
let out_filename = filename_for_metadata(tcx.sess, crate_name.as_str(), outputs);
let out_filename =
filename_for_metadata(tcx.sess, crate_name.as_str(), tcx.output_filenames(()));
// To avoid races with another rustc process scanning the output directory,
// we need to write the file somewhere else and atomically move it to its
// final destination, with an `fs::rename` call. In order for the rename to

1
compiler/rustc_middle/src/arena.rs
View File

@ -28,6 +28,7 @@ macro_rules! arena_types {
[decode] typeck_results: rustc_middle::ty::TypeckResults<'tcx>,
[decode] borrowck_result:
rustc_middle::mir::BorrowCheckResult<'tcx>,
[] resolver: rustc_data_structures::steal::Steal<rustc_middle::ty::ResolverAstLowering>,
[decode] unsafety_check_result: rustc_middle::mir::UnsafetyCheckResult,
[decode] code_region: rustc_middle::mir::coverage::CodeRegion,
[] const_allocs: rustc_middle::mir::interpret::Allocation,

2
compiler/rustc_middle/src/query/mod.rs
View File

@ -33,7 +33,7 @@ rustc_queries! {
}
query resolver_for_lowering(_: ()) -> &'tcx Steal<ty::ResolverAstLowering> {
eval_always
feedable
no_hash
desc { "getting the resolver for lowering" }
}

40
compiler/rustc_middle/src/ty/context.rs
View File

@ -81,7 +81,7 @@ use std::mem;
use std::ops::{Bound, Deref};
use std::sync::Arc;
use super::{ImplPolarity, ResolverOutputs, RvalueScopes};
use super::{ImplPolarity, RvalueScopes};
pub trait OnDiskCache<'tcx>: rustc_data_structures::sync::Sync {
/// Creates a new `OnDiskCache` instance from the serialized data in `data`.
@ -1034,16 +1034,29 @@ pub struct FreeRegionInfo {
/// This struct should only be created by `create_def`.
#[derive(Copy, Clone)]
pub struct TyCtxtFeed<'tcx> {
pub struct TyCtxtFeed<'tcx, KEY: Copy> {
pub tcx: TyCtxt<'tcx>,
// Do not allow direct access, as downstream code must not mutate this field.
def_id: LocalDefId,
key: KEY,
}
impl<'tcx> TyCtxtFeed<'tcx> {
impl<'tcx> TyCtxt<'tcx> {
pub fn feed_unit_query(self) -> TyCtxtFeed<'tcx, ()> {
TyCtxtFeed { tcx: self, key: () }
}
}
impl<'tcx, KEY: Copy> TyCtxtFeed<'tcx, KEY> {
#[inline(always)]
pub fn key(&self) -> KEY {
self.key
}
}
impl<'tcx> TyCtxtFeed<'tcx, LocalDefId> {
#[inline(always)]
pub fn def_id(&self) -> LocalDefId {
self.def_id
self.key
}
}
@ -1099,7 +1112,6 @@ pub struct GlobalCtxt<'tcx> {
/// Output of the resolver.
pub(crate) untracked_resolutions: ty::ResolverGlobalCtxt,
untracked_resolver_for_lowering: Steal<ty::ResolverAstLowering>,
/// The entire crate as AST. This field serves as the input for the hir_crate query,
/// which lowers it from AST to HIR. It must not be read or used by anything else.
pub untracked_crate: Steal<Lrc<ast::Crate>>,
@ -1262,7 +1274,8 @@ impl<'tcx> TyCtxt<'tcx> {
lint_store: Lrc<dyn Any + sync::Send + sync::Sync>,
arena: &'tcx WorkerLocal<Arena<'tcx>>,
hir_arena: &'tcx WorkerLocal<hir::Arena<'tcx>>,
resolver_outputs: ResolverOutputs,
definitions: Definitions,
untracked_resolutions: ty::ResolverGlobalCtxt,
krate: Lrc<ast::Crate>,
dep_graph: DepGraph,
on_disk_cache: Option<&'tcx dyn OnDiskCache<'tcx>>,
@ -1271,11 +1284,6 @@ impl<'tcx> TyCtxt<'tcx> {
crate_name: &str,
output_filenames: OutputFilenames,
) -> GlobalCtxt<'tcx> {
let ResolverOutputs {
definitions,
global_ctxt: untracked_resolutions,
ast_lowering: untracked_resolver_for_lowering,
} = resolver_outputs;
let data_layout = s.target.parse_data_layout().unwrap_or_else(|err| {
s.emit_fatal(err);
});
@ -1304,7 +1312,6 @@ impl<'tcx> TyCtxt<'tcx> {
lifetimes: common_lifetimes,
consts: common_consts,
untracked_resolutions,
untracked_resolver_for_lowering: Steal::new(untracked_resolver_for_lowering),
untracked_crate: Steal::new(krate),
on_disk_cache,
queries,
@ -1515,7 +1522,7 @@ impl<'tcx> TyCtxtAt<'tcx> {
self,
parent: LocalDefId,
data: hir::definitions::DefPathData,
) -> TyCtxtFeed<'tcx> {
) -> TyCtxtFeed<'tcx, LocalDefId> {
// This function modifies `self.definitions` using a side-effect.
// We need to ensure that these side effects are re-run by the incr. comp. engine.
// Depending on the forever-red node will tell the graph that the calling query
@ -1536,9 +1543,9 @@ impl<'tcx> TyCtxtAt<'tcx> {
// This is fine because:
// - those queries are `eval_always` so we won't miss their result changing;
// - this write will have happened before these queries are called.
let def_id = self.definitions.write().create_def(parent, data);
let key = self.definitions.write().create_def(parent, data);
let feed = TyCtxtFeed { tcx: self.tcx, def_id };
let feed = TyCtxtFeed { tcx: self.tcx, key };
feed.def_span(self.span);
feed
}
@ -3107,7 +3114,6 @@ fn ptr_eq<T, U>(t: *const T, u: *const U) -> bool {
pub fn provide(providers: &mut ty::query::Providers) {
providers.resolutions = |tcx, ()| &tcx.untracked_resolutions;
providers.resolver_for_lowering = |tcx, ()| &tcx.untracked_resolver_for_lowering;
providers.module_reexports =
|tcx, id| tcx.resolutions(()).reexport_map.get(&id).map(|v| &v[..]);
providers.crate_name = |tcx, id| {

4
compiler/rustc_middle/src/ty/mod.rs
View File

@ -82,8 +82,8 @@ pub use self::consts::{
pub use self::context::{
tls, CanonicalUserType, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations,
CtxtInterners, DeducedParamAttrs, FreeRegionInfo, GeneratorDiagnosticData,
GeneratorInteriorTypeCause, GlobalCtxt, Lift, OnDiskCache, TyCtxt, TypeckResults, UserType,
UserTypeAnnotationIndex,
GeneratorInteriorTypeCause, GlobalCtxt, Lift, OnDiskCache, TyCtxt, TyCtxtFeed, TypeckResults,
UserType, UserTypeAnnotationIndex,
};
pub use self::instance::{Instance, InstanceDef, ShortInstance};
pub use self::list::List;

24
compiler/rustc_middle/src/ty/query.rs
View File

@ -328,13 +328,25 @@ macro_rules! define_callbacks {
};
}
macro_rules! hash_result {
([]) => {{
Some(dep_graph::hash_result)
}};
([(no_hash) $($rest:tt)*]) => {{
None
}};
([$other:tt $($modifiers:tt)*]) => {
hash_result!([$($modifiers)*])
};
}
macro_rules! define_feedable {
($($(#[$attr:meta])* [$($modifiers:tt)*] fn $name:ident($($K:tt)*) -> $V:ty,)*) => {
impl<'tcx> TyCtxtFeed<'tcx> {
$($(#[$attr])*
$(impl<'tcx, K: IntoQueryParam<$($K)*> + Copy> TyCtxtFeed<'tcx, K> {
$(#[$attr])*
#[inline(always)]
pub fn $name(self, value: $V) -> query_stored::$name<'tcx> {
let key = self.def_id().into_query_param();
let key = self.key().into_query_param();
opt_remap_env_constness!([$($modifiers)*][key]);
let tcx = self.tcx;
@ -358,11 +370,11 @@ macro_rules! define_feedable {
tcx,
key,
&value,
dep_graph::hash_result,
hash_result!([$($modifiers)*]),
);
cache.complete(key, value, dep_node_index)
})*
}
}
})*
}
}

6
compiler/rustc_mir_transform/src/dump_mir.rs
View File

@ -7,7 +7,7 @@ use crate::MirPass;
use rustc_middle::mir::write_mir_pretty;
use rustc_middle::mir::Body;
use rustc_middle::ty::TyCtxt;
use rustc_session::config::{OutputFilenames, OutputType};
use rustc_session::config::OutputType;
pub struct Marker(pub &'static str);
@ -19,8 +19,8 @@ impl<'tcx> MirPass<'tcx> for Marker {
fn run_pass(&self, _tcx: TyCtxt<'tcx>, _body: &mut Body<'tcx>) {}
}
pub fn emit_mir(tcx: TyCtxt<'_>, outputs: &OutputFilenames) -> io::Result<()> {
let path = outputs.path(OutputType::Mir);
pub fn emit_mir(tcx: TyCtxt<'_>) -> io::Result<()> {
let path = tcx.output_filenames(()).path(OutputType::Mir);
let mut f = io::BufWriter::new(File::create(&path)?);
write_mir_pretty(tcx, None, &mut f)?;
Ok(())

15
compiler/rustc_query_system/src/dep_graph/graph.rs
View File

@ -510,7 +510,7 @@ impl<K: DepKind> DepGraph<K> {
cx: Ctxt,
key: A,
result: &R,
hash_result: fn(&mut StableHashingContext<'_>, &R) -> Fingerprint,
hash_result: Option<fn(&mut StableHashingContext<'_>, &R) -> Fingerprint>,
) -> DepNodeIndex {
if let Some(data) = self.data.as_ref() {
// The caller query has more dependencies than the node we are creating. We may
@ -521,10 +521,12 @@ impl<K: DepKind> DepGraph<K> {
// For sanity, we still check that the loaded stable hash and the new one match.
if let Some(dep_node_index) = self.dep_node_index_of_opt(&node) {
let _current_fingerprint =
crate::query::incremental_verify_ich(cx, result, &node, Some(hash_result));
crate::query::incremental_verify_ich(cx, result, &node, hash_result);
#[cfg(debug_assertions)]
data.current.record_edge(dep_node_index, node, _current_fingerprint);
if hash_result.is_some() {
data.current.record_edge(dep_node_index, node, _current_fingerprint);
}
return dep_node_index;
}
@ -539,8 +541,9 @@ impl<K: DepKind> DepGraph<K> {
});
let hashing_timer = cx.profiler().incr_result_hashing();
let current_fingerprint =
cx.with_stable_hashing_context(|mut hcx| hash_result(&mut hcx, result));
let current_fingerprint = hash_result.map(|hash_result| {
cx.with_stable_hashing_context(|mut hcx| hash_result(&mut hcx, result))
});
let print_status = cfg!(debug_assertions) && cx.sess().opts.unstable_opts.dep_tasks;
@ -550,7 +553,7 @@ impl<K: DepKind> DepGraph<K> {
&data.previous,
node,
edges,
Some(current_fingerprint),
current_fingerprint,
print_status,
);