From 72a001bc25217104f9de5ff4b35c280c95adcb28 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Fri, 27 Feb 2026 10:09:39 +1100
Subject: [PATCH] Remove `DepKindVTable::is_anon`.

It's unused.
---
 compiler/rustc_middle/src/dep_graph/dep_node.rs   | 5 -----
 compiler/rustc_query_impl/src/dep_kind_vtables.rs | 9 ---------
 2 files changed, 14 deletions(-)

diff --git a/compiler/rustc_middle/src/dep_graph/dep_node.rs b/compiler/rustc_middle/src/dep_graph/dep_node.rs
index 599c84597a8b..c356d566626d 100644
--- a/compiler/rustc_middle/src/dep_graph/dep_node.rs
+++ b/compiler/rustc_middle/src/dep_graph/dep_node.rs
@@ -174,11 +174,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 /// of the `DepKind`. Overall, this allows to implement `DepContext` using this manual
 /// jump table instead of large matches.
 pub struct DepKindVTable<'tcx> {
-    /// 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 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.
diff --git a/compiler/rustc_query_impl/src/dep_kind_vtables.rs b/compiler/rustc_query_impl/src/dep_kind_vtables.rs
index fa82a0413b1a..01e37ca3e3ee 100644
--- a/compiler/rustc_query_impl/src/dep_kind_vtables.rs
+++ b/compiler/rustc_query_impl/src/dep_kind_vtables.rs
@@ -13,7 +13,6 @@ mod non_query {
     // We use this for most things when incr. comp. is turned off.
     pub(crate) fn Null<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: false,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Unit,
             force_from_dep_node_fn: Some(|_, dep_node, _| {
@@ -26,7 +25,6 @@ pub(crate) fn Null<'tcx>() -> DepKindVTable<'tcx> {
     // We use this for the forever-red node.
     pub(crate) fn Red<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: false,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Unit,
             force_from_dep_node_fn: Some(|_, dep_node, _| {
@@ -38,7 +36,6 @@ pub(crate) fn Red<'tcx>() -> DepKindVTable<'tcx> {
 
     pub(crate) fn SideEffect<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: false,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Unit,
             force_from_dep_node_fn: Some(|tcx, _, prev_index| {
@@ -51,7 +48,6 @@ pub(crate) fn SideEffect<'tcx>() -> DepKindVTable<'tcx> {
 
     pub(crate) fn AnonZeroDeps<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: true,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Opaque,
             force_from_dep_node_fn: Some(|_, _, _| bug!("cannot force an anon node")),
@@ -61,7 +57,6 @@ pub(crate) fn AnonZeroDeps<'tcx>() -> DepKindVTable<'tcx> {
 
     pub(crate) fn TraitSelect<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: true,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Unit,
             force_from_dep_node_fn: None,
@@ -71,7 +66,6 @@ pub(crate) fn TraitSelect<'tcx>() -> DepKindVTable<'tcx> {
 
     pub(crate) fn CompileCodegenUnit<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: false,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Opaque,
             force_from_dep_node_fn: None,
@@ -81,7 +75,6 @@ pub(crate) fn CompileCodegenUnit<'tcx>() -> DepKindVTable<'tcx> {
 
     pub(crate) fn CompileMonoItem<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: false,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Opaque,
             force_from_dep_node_fn: None,
@@ -91,7 +84,6 @@ pub(crate) fn CompileMonoItem<'tcx>() -> DepKindVTable<'tcx> {
 
     pub(crate) fn Metadata<'tcx>() -> DepKindVTable<'tcx> {
         DepKindVTable {
-            is_anon: false,
             is_eval_always: false,
             key_fingerprint_style: KeyFingerprintStyle::Unit,
             force_from_dep_node_fn: None,
@@ -124,7 +116,6 @@ pub(crate) fn make_dep_kind_vtable_for_query<'tcx, Q>(
     }
 
     DepKindVTable {
-        is_anon,
         is_eval_always,
         key_fingerprint_style,
         force_from_dep_node_fn: can_recover.then_some(force_from_dep_node_inner::<Q>),