Move rustc_middle::query::values to rustc_query_impl.

Because all uses are now in `rustc_query_impl`. This was made possible
by the previous commit. Less code in `rustc_middle`, hooray.

Cargo.lock

@@ -4493,6 +4493,7 @@ name = "rustc_query_impl"
 version = "0.0.0"
 dependencies = [
  "measureme",
+ "rustc_abi",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_hashes",

compiler/rustc_middle/src/query/mod.rs

@@ -13,7 +13,6 @@ mod keys;
 pub mod on_disk_cache;
 #[macro_use]
 pub mod plumbing;
-pub mod values;
 
 pub fn describe_as_module(def_id: impl Into<LocalDefId>, tcx: TyCtxt<'_>) -> String {
     let def_id = def_id.into();

compiler/rustc_query_impl/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 measureme = "12.0.1"
+rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
 rustc_hashes = { path = "../rustc_hashes" }

compiler/rustc_query_impl/src/lib.rs

@@ -19,7 +19,6 @@ use rustc_middle::queries::{
 use rustc_middle::query::AsLocalKey;
 use rustc_middle::query::on_disk_cache::{CacheEncoder, EncodedDepNodeIndex, OnDiskCache};
 use rustc_middle::query::plumbing::{HashResult, QuerySystem, QuerySystemFns, QueryVTable};
-use rustc_middle::query::values::Value;
 use rustc_middle::ty::TyCtxt;
 use rustc_query_system::dep_graph::SerializedDepNodeIndex;
 use rustc_query_system::query::{
@@ -32,6 +31,7 @@ pub use crate::plumbing::{QueryCtxt, query_key_hash_verify_all};
 use crate::plumbing::{encode_all_query_results, try_mark_green};
 use crate::profiling_support::QueryKeyStringCache;
 pub use crate::profiling_support::alloc_self_profile_query_strings;
+use crate::values::Value;
 
 mod error;
 mod execution;
@@ -39,6 +39,7 @@ mod job;
 #[macro_use]
 mod plumbing;
 mod profiling_support;
+mod values;
 
 #[derive(ConstParamTy)] // Allow this struct to be used for const-generic values.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]

compiler/rustc_query_impl/src/values.rs

@@ -7,15 +7,15 @@ use rustc_errors::codes::*;
 use rustc_errors::{Applicability, MultiSpan, pluralize, struct_span_code_err};
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
+use rustc_middle::dep_graph::dep_kinds;
+use rustc_middle::query::plumbing::CyclePlaceholder;
+use rustc_middle::ty::{self, Representability, Ty, TyCtxt};
+use rustc_middle::{bug, span_bug};
 use rustc_query_system::query::{CycleError, report_cycle};
 use rustc_span::def_id::LocalDefId;
 use rustc_span::{ErrorGuaranteed, Span};
 
-use crate::dep_graph::dep_kinds;
-use crate::query::plumbing::CyclePlaceholder;
-use crate::ty::{self, Representability, Ty, TyCtxt};
-
-pub trait Value<'tcx>: Sized {
+pub(crate) trait Value<'tcx>: Sized {
     fn from_cycle_error(tcx: TyCtxt<'tcx>, cycle_error: &CycleError, guar: ErrorGuaranteed)
     -> Self;
 }