symbol.c: use `rb_gc_mark_and_move` over `rb_gc_location`

The `p->field = rb_gc_location(p->field)` isn't ideal because it means all
references are rewritten on compaction, regardless of whether the referenced
object has moved. This isn't good for caches nor for Copy-on-Write.

`rb_gc_mark_and_move` avoid needless writes, and most of the time allow to
have a single function for both marking and updating references.

1 files changed, 1 insertions, 2 deletions

diff --git a/internal/symbol.h b/internal/symbol.h
index 8571c00289..b9109b1347 100644
--- a/internal/symbol.h
+++ b/internal/symbol.h
@@ -17,8 +17,7 @@
 #endif
 
 /* symbol.c */
-void rb_sym_global_symbols_mark(void);
-void rb_sym_global_symbols_update_references(void);
+void rb_sym_global_symbols_mark_and_move(void);
 VALUE rb_to_symbol_type(VALUE obj);
 VALUE rb_sym_intern(const char *ptr, long len, rb_encoding *enc);
 VALUE rb_sym_intern_ascii(const char *ptr, long len);