[gcc r15-8581] gccrs: lang-item: Add Option::{None, Some}, Iterator::next, IntoIter::into_iter

[Arthur Cohen]

https://gcc.gnu.org/g:f8aa5ececd42ad2cefa837a99756300f41bc4d5a

commit r15-8581-gf8aa5ececd42ad2cefa837a99756300f41bc4d5a
Author: Arthur Cohen <arthur.cohen@embecosm.com>
Date:   Mon Dec 16 14:17:29 2024 +0100

    gccrs: lang-item: Add Option::{None, Some}, Iterator::next, IntoIter::into_iter
    
    gcc/rust/ChangeLog:
    
            * util/rust-lang-item.h: Add new lang items.
            * util/rust-lang-item.cc: Likewise.

Diff:
---
 gcc/rust/util/rust-lang-item.cc | 6 ++++++
 gcc/rust/util/rust-lang-item.h  | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/gcc/rust/util/rust-lang-item.cc b/gcc/rust/util/rust-lang-item.cc
index 216202af9266..c4c1d1c093ab 100644
--- a/gcc/rust/util/rust-lang-item.cc
+++ b/gcc/rust/util/rust-lang-item.cc
@@ -92,6 +92,12 @@ const BiMap<std::string, LangItem::Kind> Rust::LangItem::lang_items = {{
   {"str", Kind::STR},
   {"f32_runtime", Kind::F32_RUNTIME},
   {"f64_runtime", Kind::F64_RUNTIME},
+
+  {"Some", Kind::OPTION_SOME},
+  {"None", Kind::OPTION_NONE},
+
+  {"into_iter", Kind::INTOITER_INTOITER},
+  {"next", Kind::ITERATOR_NEXT},
 }};
 
 tl::optional<LangItem::Kind>
diff --git a/gcc/rust/util/rust-lang-item.h b/gcc/rust/util/rust-lang-item.h
index 66d26d03907c..9e432e2ccc6e 100644
--- a/gcc/rust/util/rust-lang-item.h
+++ b/gcc/rust/util/rust-lang-item.h
@@ -26,6 +26,9 @@ namespace Rust {
 class LangItem
 {
 public:
+  // FIXME: We should clean up that enum to make it more inline with the list of
+  // lang-items in Rust 1.49
+  // https://github.com/rust-lang/rust/blob/1.49.0/compiler/rustc_hir/src/lang_items.rs
   enum class Kind
   {
     // https://github.com/rust-lang/rust/blob/master/library/core/src/ops/arith.rs
@@ -117,6 +120,12 @@ public:
     STR,
     F32_RUNTIME,
     F64_RUNTIME,
+
+    OPTION_SOME,
+    OPTION_NONE,
+
+    INTOITER_INTOITER,
+    ITERATOR_NEXT,
   };
 
   static const BiMap<std::string, Kind> lang_items;