This reverts commit f7052a107c64471cd313a3eb4e4e9c03ded98b10.

* src/comp.c (emit_EQ): Do not use '__builtin_expect' with
libgccjit < 14.

* src/pdumper.c (dump_do_dump_relocation):
* src/comp.h:
* src/comp.c (obj_to_reloc, emit_static_object)
(declare_imported_data_relocs, check_abi_version, setup_constants)
(load_comp_unit):  Fix comments and whitespace.

* src/comp.c (gcc_jit_context_zero) [WINDOWSNT]: Define and define
the prototype of its function pointer.
(init_gccjit_functions) [WINDOWSNT]: Load 'gcc_jit_context_zero
from the DLL.

See the comment at the start of comp.h about this.

* src/comp.c (ABI_VERSION): Make it an integer, and increment.
(ABI_VERSION_SYM): New.
(hash_native_abi): Use it.
(emit_abi_version, check_abi_version): New functions.
(Fcomp__compile_ctxt_to_file0): Emit ABI_VERSION_SYM.
(load_comp_unit): Check ABI version.

* src/comp.c (comp_t): Add n_data_relocs and
n_data_relocs_ephemeral.
(obj_to_reloc): Use them, and handle case of using pointers to
constants.
(emit_static_object): Add FIXMEs.
(declare_imported_data_relocs): Handle case of pointers to
constants vectors differently.
(declare_imported_data): Set comp's number of constants.
(setup_constants): New function.
(load_comp_unit): Don't create roots, pin instead. Don't rely on
tricks to protect ephemeral vector.
(Fnative_elisp_load): Init pins.

* src/comp.h (USE_POINTER_TO_CONSTANT_VECTOR): New. If defined,
don't use vectors.
(Lisp_Native_Comp_Unit): Define data_relocs and data_eph_relocs
depending on USE_POINTER_TO_CONSTANT_VECTOR. Add pin ids

* src/igc.c (unpin): Add an eassert.
(root_create_exact_ptr, igc_root_create_exact_ptr):
Return root list node.
(maybe_destroy_rootI: Removed.
(igc_pin, igc_unpin): New functions.
(igc_root_destroy_comp_unit): Removed.
(igc_init_pin, igc_unpin_comp_unit): New function.

* src/igc.h: Declare new functions, remove old ones.

This reverts commit f996f5512c774c45a5bd2597df9c4c8560c202ba
because it is missing some important other changes.

* src/comp.h (USE_POINTER_TO_CONSTANT_VECTOR): If defined, don't
use vectors.
(Lisp_Native_Comp_Unit): Make data_relocs and data_eph_relocs
pointers to Lisp_Object pointers.

* src/comp.c (ABI_VERSION): Increase to 13.
(check_comp_unit_relocs): Don't check if pointers are used.
* src/comp.c (load_comp_unit, Fcomp__register_lambda): Handle
case that constant vectors are pointers.
* src/comp.c (emit_static_object): Add some FIXME comments.
(declare_imported_data_relocs): Handle case of pointers to
constants vectors differently.
* src/comp.c (declare_imported_data_relocs): Make array elemen
type volatile.
* src/comp.c (comp_t): Add n_data_relocs and
n_data_relocs_ephemeral.
(obj_to_reloc): Set array length correctly.
(declare_imported_data_relocs): Return # of constants.
(declare_imported_data): Set comp's number of constants.

* src/igc.c (root_create_exact_ptr, igc_root_create_exact_ptr):
Return root list node.
* src/igc.h (igc_root_create_exact_ptr): Change return type.

* src/pdumper.c (dump_do_dump_relocation): Don't do fixup if
using pointers to constants vectors.

* src/comp.h (struct Lisp_Native_Comp_Unit): Add member
data_eph_vec.
* src/comp.c (load_comp_unit): Use data_eph_vec to protect the
eph constants.