Querify MonoItem collection

4 files changed, 34 insertions, 2 deletions

diff --git a/compiler/rustc_middle/src/query/erase.rs b/compiler/rustc_middle/src/query/erase.rs
index 1d4c36e28bd..013847f0b2d 100644
--- a/compiler/rustc_middle/src/query/erase.rs
+++ b/compiler/rustc_middle/src/query/erase.rs
@@ -216,6 +216,10 @@ impl<T0, T1> EraseType for (&'_ T0, &'_ [T1]) {
     type Result = [u8; size_of::<(&'static (), &'static [()])>()];
 }
 
+impl<T0, T1> EraseType for (&'_ [T0], &'_ [T1]) {
+    type Result = [u8; size_of::<(&'static [()], &'static [()])>()];
+}
+
 impl<T0> EraseType for (&'_ T0, Result<(), ErrorGuaranteed>) {
     type Result = [u8; size_of::<(&'static (), Result<(), ErrorGuaranteed>)>()];
 }
diff --git a/compiler/rustc_middle/src/query/keys.rs b/compiler/rustc_middle/src/query/keys.rs
index fe28ef0f70c..c5def5fc65b 100644
--- a/compiler/rustc_middle/src/query/keys.rs
+++ b/compiler/rustc_middle/src/query/keys.rs
@@ -7,6 +7,7 @@ use rustc_span::symbol::{Ident, Symbol};
 use rustc_span::{DUMMY_SP, Span};
 
 use crate::infer::canonical::CanonicalQueryInput;
+use crate::mir::mono::CollectionMode;
 use crate::ty::fast_reject::SimplifiedType;
 use crate::ty::layout::{TyAndLayout, ValidityRequirement};
 use crate::ty::{self, GenericArg, GenericArgsRef, Ty, TyCtxt};
@@ -590,3 +591,11 @@ impl<'tcx> Key for (ValidityRequirement, ty::ParamEnvAnd<'tcx, Ty<'tcx>>) {
         }
     }
 }
+
+impl<'tcx> Key for (ty::Instance<'tcx>, CollectionMode) {
+    type Cache<V> = DefaultCache<Self, V>;
+
+    fn default_span(&self, tcx: TyCtxt<'_>) -> Span {
+        self.0.default_span(tcx)
+    }
+}
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
index 4e3668822ec..4068d06f6df 100644
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -40,6 +40,7 @@ use rustc_session::cstore::{
 };
 use rustc_session::lint::LintExpectationId;
 use rustc_span::def_id::LOCAL_CRATE;
+use rustc_span::source_map::Spanned;
 use rustc_span::symbol::Symbol;
 use rustc_span::{DUMMY_SP, Span};
 use rustc_target::spec::PanicStrategy;
@@ -59,7 +60,7 @@ use crate::mir::interpret::{
     EvalStaticInitializerRawResult, EvalToAllocationRawResult, EvalToConstValueResult,
     EvalToValTreeResult, GlobalId, LitToConstError, LitToConstInput,
 };
-use crate::mir::mono::CodegenUnit;
+use crate::mir::mono::{CodegenUnit, CollectionMode, MonoItem};
 use crate::query::erase::{Erase, erase, restore};
 use crate::query::plumbing::{
     CyclePlaceholder, DynamicQuery, query_ensure, query_ensure_error_guaranteed, query_get_at,
@@ -2339,6 +2340,16 @@ rustc_queries! {
         arena_cache
         desc { "functions to skip for move-size check" }
     }
+
+    query items_of_instance(key: (ty::Instance<'tcx>, CollectionMode)) -> (&'tcx [Spanned<MonoItem<'tcx>>], &'tcx [Spanned<MonoItem<'tcx>>]) {
+        desc { "collecting items used by `{}`", key.0 }
+        cache_on_disk_if { true }
+    }
+
+    query size_estimate(key: ty::Instance<'tcx>) -> usize {
+        desc { "estimating codegen size of `{}`", key }
+        cache_on_disk_if { true }
+    }
 }
 
 rustc_query_append! { define_callbacks! }
diff --git a/compiler/rustc_middle/src/query/on_disk_cache.rs b/compiler/rustc_middle/src/query/on_disk_cache.rs
index 8b77a4a81ca..3849cb72668 100644
--- a/compiler/rustc_middle/src/query/on_disk_cache.rs
+++ b/compiler/rustc_middle/src/query/on_disk_cache.rs
@@ -12,6 +12,7 @@ use rustc_index::{Idx, IndexVec};
 use rustc_macros::{Decodable, Encodable};
 use rustc_middle::dep_graph::{DepNodeIndex, SerializedDepNodeIndex};
 use rustc_middle::mir::interpret::{AllocDecodingSession, AllocDecodingState};
+use rustc_middle::mir::mono::MonoItem;
 use rustc_middle::mir::{self, interpret};
 use rustc_middle::ty::codec::{RefDecodable, TyDecoder, TyEncoder};
 use rustc_middle::ty::{self, Ty, TyCtxt};
@@ -22,7 +23,7 @@ use rustc_session::Session;
 use rustc_span::hygiene::{
     ExpnId, HygieneDecodeContext, HygieneEncodeContext, SyntaxContext, SyntaxContextData,
 };
-use rustc_span::source_map::SourceMap;
+use rustc_span::source_map::{SourceMap, Spanned};
 use rustc_span::{
     BytePos, CachingSourceMapView, ExpnData, ExpnHash, Pos, RelativeBytePos, SourceFile, Span,
     SpanDecoder, SpanEncoder, StableSourceFileId, Symbol,
@@ -773,6 +774,13 @@ impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for &'tcx [rustc_ast::InlineAsm
     }
 }
 
+impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for &'tcx [Spanned<MonoItem<'tcx>>] {
+    #[inline]
+    fn decode(d: &mut CacheDecoder<'a, 'tcx>) -> Self {
+        RefDecodable::decode(d)
+    }
+}
+
 impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>>
     for &'tcx crate::traits::specialization_graph::Graph
 {