From 4e8199b572f2035b7749cba276ece3a26630d23e Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:18:21 +0200
Subject: Adding upstream version 1.67.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 compiler/rustc_hir/src/weak_lang_items.rs | 59 ++++++++++---------------------
 1 file changed, 18 insertions(+), 41 deletions(-)

(limited to 'compiler/rustc_hir/src/weak_lang_items.rs')

diff --git a/compiler/rustc_hir/src/weak_lang_items.rs b/compiler/rustc_hir/src/weak_lang_items.rs
index da9c9c121..0cc50c6dd 100644
--- a/compiler/rustc_hir/src/weak_lang_items.rs
+++ b/compiler/rustc_hir/src/weak_lang_items.rs
@@ -1,53 +1,30 @@
 //! Validity checking for weak lang items
 
-use crate::def_id::DefId;
-use crate::{lang_items, LangItem, LanguageItems};
+use crate::LangItem;
 
-use rustc_ast as ast;
-use rustc_data_structures::fx::FxIndexMap;
 use rustc_span::symbol::{sym, Symbol};
 
-use std::sync::LazyLock;
-
 macro_rules! weak_lang_items {
-    ($($name:ident, $item:ident, $sym:ident;)*) => (
-
-pub static WEAK_ITEMS_REFS: LazyLock<FxIndexMap<Symbol, LangItem>> = LazyLock::new(|| {
-    let mut map = FxIndexMap::default();
-    $(map.insert(sym::$name, LangItem::$item);)*
-    map
-});
-
-pub static WEAK_ITEMS_SYMBOLS: LazyLock<FxIndexMap<LangItem, Symbol>> = LazyLock::new(|| {
-    let mut map = FxIndexMap::default();
-    $(map.insert(LangItem::$item, sym::$sym);)*
-    map
-});
-
-pub fn link_name(attrs: &[ast::Attribute]) -> Option<Symbol>
-{
-    lang_items::extract(attrs).and_then(|(name, _)| {
-        $(if name == sym::$name {
-            Some(sym::$sym)
-        } else)* {
-            None
+    ($($item:ident, $sym:ident;)*) => {
+        pub static WEAK_LANG_ITEMS: &[LangItem] = &[$(LangItem::$item,)*];
+
+        impl LangItem {
+            pub fn is_weak(self) -> bool {
+                matches!(self, $(LangItem::$item)|*)
+            }
+
+            pub fn link_name(self) -> Option<Symbol> {
+                match self {
+                    $( LangItem::$item => Some(sym::$sym),)*
+                    _ => None,
+                }
+            }
         }
-    })
-}
-
-impl LanguageItems {
-    pub fn is_weak_lang_item(&self, item_def_id: DefId) -> bool {
-        let did = Some(item_def_id);
-
-        $(self.$name() == did)||*
     }
 }
 
-) }
-
 weak_lang_items! {
-    panic_impl,         PanicImpl,          rust_begin_unwind;
-    eh_personality,     EhPersonality,      rust_eh_personality;
-    eh_catch_typeinfo,  EhCatchTypeinfo,    rust_eh_catch_typeinfo;
-    oom,                Oom,                rust_oom;
+    PanicImpl,          rust_begin_unwind;
+    EhPersonality,      rust_eh_personality;
+    EhCatchTypeinfo,    rust_eh_catch_typeinfo;
 }
-- 
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