https://git.ruby-lang.org/ruby.git/commit/?id=1acc1a5c6d

From 1acc1a5c6d5d01b2822d7aa4356208095481724b Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@r...>
Date: Fri, 14 Oct 2022 16:11:37 -0700
Subject: YJIT doesn't need rb_obj_ensure_iv_index_mapping

We should make this function static and remove it from YJIT bindings.
---
 internal/variable.h            | 1 -
 variable.c                     | 2 +-
 yjit/bindgen/src/main.rs       | 1 -
 yjit/src/cruby_bindings.inc.rs | 3 ---
 4 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/internal/variable.h b/internal/variable.h
index 47037a3392..bb24f5129f 100644
--- a/internal/variable.h
+++ b/internal/variable.h
@@ -35,7 +35,6 @@ void rb_gvar_ractor_local(const char *name); https://github.com/ruby/ruby/blob/trunk/internal/variable.h#L35
 static inline bool ROBJ_TRANSIENT_P(VALUE obj);
 static inline void ROBJ_TRANSIENT_SET(VALUE obj);
 static inline void ROBJ_TRANSIENT_UNSET(VALUE obj);
-uint32_t rb_obj_ensure_iv_index_mapping(VALUE obj, ID id);
 
 struct gen_ivtbl;
 int rb_gen_ivtbl_get(VALUE obj, ID id, struct gen_ivtbl **ivtbl);
diff --git a/variable.c b/variable.c
index 1f532f2154..4b8c87bd1f 100644
--- a/variable.c
+++ b/variable.c
@@ -1449,7 +1449,7 @@ rb_init_iv_list(VALUE obj) https://github.com/ruby/ruby/blob/trunk/variable.c#L1449
 // @note May raise when there are too many instance variables.
 // @note YJIT uses this function at compile time to simplify the work needed to
 //       access the variable at runtime.
-uint32_t
+static uint32_t
 rb_obj_ensure_iv_index_mapping(VALUE obj, ID id)
 {
     RUBY_ASSERT(RB_TYPE_P(obj, T_OBJECT));
diff --git a/yjit/bindgen/src/main.rs b/yjit/bindgen/src/main.rs
index b945e9b106..7bdfdade77 100644
--- a/yjit/bindgen/src/main.rs
+++ b/yjit/bindgen/src/main.rs
@@ -304,7 +304,6 @@ fn main() { https://github.com/ruby/ruby/blob/trunk/yjit/bindgen/src/main.rs#L304
 
         // From internal/variable.h
         .allowlist_function("rb_gvar_(get|set)")
-        .allowlist_function("rb_obj_ensure_iv_index_mapping")
 
         // From include/ruby/internal/intern/variable.h
         .allowlist_function("rb_attr_get")
diff --git a/yjit/src/cruby_bindings.inc.rs b/yjit/src/cruby_bindings.inc.rs
index db14f9ca02..e12ac9eef1 100644
--- a/yjit/src/cruby_bindings.inc.rs
+++ b/yjit/src/cruby_bindings.inc.rs
@@ -1015,9 +1015,6 @@ extern "C" { https://github.com/ruby/ruby/blob/trunk/yjit/src/cruby_bindings.inc.rs#L1015
 extern "C" {
     pub fn rb_hash_resurrect(hash: VALUE) -> VALUE;
 }
-extern "C" {
-    pub fn rb_obj_ensure_iv_index_mapping(obj: VALUE, id: ID) -> u32;
-}
 extern "C" {
     pub fn rb_gvar_get(arg1: ID) -> VALUE;
 }
-- 
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