From df09feddfa7900c841877faa3cda86bfc08d9610 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Tue, 20 May 2025 16:39:59 +1000
Subject: Remove `DropNodeKey::kind`.

It's not needed, because `next` and `local` fields uniquely identify the
drop. This is a ~2% speed win on the very large program in #134404, and
it's also a tiny bit simpler.
---
 compiler/rustc_mir_build/src/builder/scope.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/compiler/rustc_mir_build/src/builder/scope.rs b/compiler/rustc_mir_build/src/builder/scope.rs
index 2a30777e98c..bc39ad6b267 100644
--- a/compiler/rustc_mir_build/src/builder/scope.rs
+++ b/compiler/rustc_mir_build/src/builder/scope.rs
@@ -230,7 +230,6 @@ struct DropNode {
 struct DropNodeKey {
     next: DropIdx,
     local: Local,
-    kind: DropKind,
 }
 
 impl Scope {
@@ -291,7 +290,7 @@ impl DropTree {
         let drops = &mut self.drops;
         *self
             .existing_drops_map
-            .entry(DropNodeKey { next, local: data.local, kind: data.kind })
+            .entry(DropNodeKey { next, local: data.local })
             // Create a new node, and also add its index to the map.
             .or_insert_with(|| drops.push(DropNode { data, next }))
     }
-- 
cgit 1.4.1-3-g733a5