Move definition of SIZE_POOL_COUNT back to gc.h

SIZE_POOL_COUNT is a GC macro, it should belong in gc.h and not shape.h.
SIZE_POOL_COUNT doesn't depend on shape.h so we can have shape.h depend
on gc.h.

Co-Authored-By: Matt Valentine-House <matt@eightbitraptor.com>

common.mk

@@ -9244,12 +9244,16 @@ math.$(OBJEXT): {$(VPATH)}shape.h
 math.$(OBJEXT): {$(VPATH)}st.h
 math.$(OBJEXT): {$(VPATH)}subst.h
 memory_view.$(OBJEXT): $(hdrdir)/ruby/ruby.h
+memory_view.$(OBJEXT): $(top_srcdir)/internal/compilers.h
+memory_view.$(OBJEXT): $(top_srcdir)/internal/gc.h
 memory_view.$(OBJEXT): $(top_srcdir)/internal/hash.h
 memory_view.$(OBJEXT): $(top_srcdir)/internal/variable.h
+memory_view.$(OBJEXT): $(top_srcdir)/internal/warnings.h
 memory_view.$(OBJEXT): {$(VPATH)}assert.h
 memory_view.$(OBJEXT): {$(VPATH)}backward/2/assume.h
 memory_view.$(OBJEXT): {$(VPATH)}backward/2/attributes.h
 memory_view.$(OBJEXT): {$(VPATH)}backward/2/bool.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/gcc_version_since.h
 memory_view.$(OBJEXT): {$(VPATH)}backward/2/inttypes.h
 memory_view.$(OBJEXT): {$(VPATH)}backward/2/limits.h
 memory_view.$(OBJEXT): {$(VPATH)}backward/2/long_long.h
@@ -10662,6 +10666,7 @@ pack.$(OBJEXT): $(hdrdir)/ruby/ruby.h
 pack.$(OBJEXT): $(top_srcdir)/internal/array.h
 pack.$(OBJEXT): $(top_srcdir)/internal/bits.h
 pack.$(OBJEXT): $(top_srcdir)/internal/compilers.h
+pack.$(OBJEXT): $(top_srcdir)/internal/gc.h
 pack.$(OBJEXT): $(top_srcdir)/internal/static_assert.h
 pack.$(OBJEXT): $(top_srcdir)/internal/string.h
 pack.$(OBJEXT): $(top_srcdir)/internal/symbol.h
@@ -11716,6 +11721,7 @@ random.$(OBJEXT): $(top_srcdir)/internal/bignum.h
 random.$(OBJEXT): $(top_srcdir)/internal/bits.h
 random.$(OBJEXT): $(top_srcdir)/internal/compilers.h
 random.$(OBJEXT): $(top_srcdir)/internal/fixnum.h
+random.$(OBJEXT): $(top_srcdir)/internal/gc.h
 random.$(OBJEXT): $(top_srcdir)/internal/numeric.h
 random.$(OBJEXT): $(top_srcdir)/internal/random.h
 random.$(OBJEXT): $(top_srcdir)/internal/sanitizers.h

internal/gc.h

@@ -67,7 +67,13 @@ struct rb_objspace; /* in vm_core.h */
     rb_obj_write((VALUE)(a), UNALIGNED_MEMBER_ACCESS((VALUE *)(slot)), \
                  (VALUE)(b), __FILE__, __LINE__)
 
-#include "shape.h"
+// We use SIZE_POOL_COUNT number of shape IDs for transitions out of different size pools
+// The next available shapd ID will be the SPECIAL_CONST_SHAPE_ID
+#if USE_RVARGC && (SIZEOF_UINT64_T == SIZEOF_VALUE)
+# define SIZE_POOL_COUNT 5
+#else
+# define SIZE_POOL_COUNT 1
+#endif
 
 #define RCLASS_EXT_EMBEDDED (SIZE_POOL_COUNT > 1)
 

shape.h

@@ -1,5 +1,8 @@
 #ifndef RUBY_SHAPE_H
 #define RUBY_SHAPE_H
+
+#include "internal/gc.h"
+
 #if (SIZEOF_UINT64_T == SIZEOF_VALUE)
 #define SIZEOF_SHAPE_T 4
 #define SHAPE_IN_BASIC_FLAGS 1
@@ -33,14 +36,6 @@ typedef uint16_t shape_id_t;
 # define INVALID_SHAPE_ID SHAPE_MASK
 # define ROOT_SHAPE_ID 0x0
 
-// We use SIZE_POOL_COUNT number of shape IDs for transitions out of different size pools
-// The next available shapd ID will be the SPECIAL_CONST_SHAPE_ID
-#if USE_RVARGC && (SIZEOF_UINT64_T == SIZEOF_VALUE)
-# define SIZE_POOL_COUNT 5
-#else
-# define SIZE_POOL_COUNT 1
-#endif
-
 # define SPECIAL_CONST_SHAPE_ID (SIZE_POOL_COUNT * 2)
 # define OBJ_TOO_COMPLEX_SHAPE_ID (SPECIAL_CONST_SHAPE_ID + 1)
 

yjit/src/cruby_bindings.inc.rs

@@ -1103,6 +1103,8 @@ extern "C" {
     pub fn rb_attr_get(obj: VALUE, name: ID) -> VALUE;
     pub fn rb_obj_info_dump(obj: VALUE);
     pub fn rb_reg_new_ary(ary: VALUE, options: ::std::os::raw::c_int) -> VALUE;
+    pub fn rb_class_allocate_instance(klass: VALUE) -> VALUE;
+    pub fn rb_obj_info(obj: VALUE) -> *const ::std::os::raw::c_char;
     pub fn rb_shape_id_offset() -> i32;
     pub fn rb_shape_get_shape_by_id(shape_id: shape_id_t) -> *mut rb_shape_t;
     pub fn rb_shape_get_shape_id(obj: VALUE) -> shape_id_t;
@@ -1124,8 +1126,6 @@ extern "C" {
         n: ::std::os::raw::c_long,
         elts: *const VALUE,
     ) -> VALUE;
-    pub fn rb_class_allocate_instance(klass: VALUE) -> VALUE;
-    pub fn rb_obj_info(obj: VALUE) -> *const ::std::os::raw::c_char;
     pub fn rb_method_entry_at(obj: VALUE, id: ID) -> *const rb_method_entry_t;
     pub fn rb_callable_method_entry(klass: VALUE, id: ID) -> *const rb_callable_method_entry_t;
     pub fn rb_callable_method_entry_or_negative(