From 4d0cfd5b6f179081ab5fa412a8dd1d7762e9403c Mon Sep 17 00:00:00 2001
From: Arthur Cohen <arthur.cohen@embecosm.com>
Date: Thu, 26 Dec 2024 23:00:08 +0000
Subject: gccrs: mappings: Add get_lang_item_node

This method errors out if the lang item has not been declared yet.

gcc/rust/ChangeLog:

	* util/rust-hir-map.cc (Mappings::get_lang_item_node): New.
	* util/rust-hir-map.h: New function.
---
 gcc/rust/util/rust-hir-map.cc | 10 ++++++++++
 gcc/rust/util/rust-hir-map.h  |  1 +
 2 files changed, 11 insertions(+)

(limited to 'gcc/rust/util')

diff --git a/gcc/rust/util/rust-hir-map.cc b/gcc/rust/util/rust-hir-map.cc
index f11a779..b94591e 100644
--- a/gcc/rust/util/rust-hir-map.cc
+++ b/gcc/rust/util/rust-hir-map.cc
@@ -1299,5 +1299,15 @@ Mappings::lookup_lang_item_node (LangItem::Kind item_type)
   return it->second;
 }
 
+NodeId
+Mappings::get_lang_item_node (LangItem::Kind item_type)
+{
+  if (auto lookup = lookup_lang_item_node (item_type))
+    return *lookup;
+
+  rust_fatal_error (UNKNOWN_LOCATION, "failed to find lang item %qs",
+		    LangItem::ToString (item_type).c_str ());
+}
+
 } // namespace Analysis
 } // namespace Rust
diff --git a/gcc/rust/util/rust-hir-map.h b/gcc/rust/util/rust-hir-map.h
index aba51be..21e5328 100644
--- a/gcc/rust/util/rust-hir-map.h
+++ b/gcc/rust/util/rust-hir-map.h
@@ -261,6 +261,7 @@ public:
 
   void insert_lang_item_node (LangItem::Kind item_type, NodeId node_id);
   tl::optional<NodeId &> lookup_lang_item_node (LangItem::Kind item_type);
+  NodeId get_lang_item_node (LangItem::Kind item_type);
 
   // This will fatal_error when this lang item does not exist
   DefId get_lang_item (LangItem::Kind item_type, location_t locus);
-- 
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