ZJIT: Remove rb_zjit_writebarrier_check_immediate

Author: tekknolagi

zjit.c

@@ -304,14 +304,6 @@ rb_zjit_class_has_default_allocator(VALUE klass)
 VALUE rb_vm_untag_block_handler(VALUE block_handler);
 VALUE rb_vm_get_untagged_block_handler(rb_control_frame_t *reg_cfp);
 
-void
-rb_zjit_writebarrier_check_immediate(VALUE recv, VALUE val)
-{
-    if (!RB_SPECIAL_CONST_P(val)) {
-        rb_gc_writebarrier(recv, val);
-    }
-}
-
 // Primitives used by zjit.rb. Don't put other functions below, which wouldn't use them.
 VALUE rb_zjit_enable(rb_execution_context_t *ec, VALUE self);
 VALUE rb_zjit_assert_compiles(rb_execution_context_t *ec, VALUE self);

zjit/bindgen/src/main.rs

@@ -146,7 +146,6 @@ fn main() {
         .allowlist_function("rb_gc_writebarrier")
         .allowlist_function("rb_gc_writebarrier_remember")
         .allowlist_function("rb_gc_register_mark_object")
-        .allowlist_function("rb_zjit_writebarrier_check_immediate")
 
         // VALUE variables for Ruby class objects
         .allowlist_var("rb_cBasicObject")

zjit/src/codegen.rs

@@ -1308,7 +1308,7 @@ fn gen_write_barrier(jit: &mut JITState, asm: &mut Assembler, recv: Opnd, val: O
         asm.je(jit, result_edge.clone());
 
         // Heap object; fire the write barrier
-        asm_ccall!(asm, rb_zjit_writebarrier_check_immediate, recv, val);
+        asm_ccall!(asm, rb_gc_writebarrier, recv, val);
         asm.jmp(result_edge);
 
         // Join block