OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

jit: implement gcc_jit_rvalue_set_bool_require_tail_call 

This implements the libgccjit support for must-tail-call via
a new:
  gcc_jit_rvalue_set_bool_require_tail_call
API entrypoint.

(I didn't implement a wrapper for this within the C++ bindings)

gcc/jit/ChangeLog:
	* docs/topics/compatibility.rst: Add LIBGCCJIT_ABI_6.
	* docs/topics/expressions.rst (Function calls): Add documentation
	of gcc_jit_rvalue_set_bool_require_tail_call.
	* docs/_build/texinfo/libgccjit.texi: Regenerate.
	* jit-common.h (gcc::jit::recording::base_call): Add forward decl.
	* jit-playback.c: Within namespace gcc::jit::playback...
	(context::build_call) Add "require_tail_call" param and use it
	to set CALL_EXPR_MUST_TAIL_CALL.
	(context::new_call): Add "require_tail_call" param.
	(context::new_call_through_ptr): Likewise.
	* jit-playback.h: Within namespace gcc::jit::playback...
	(context::new_call: Add "require_tail_call" param.
	(context::new_call_through_ptr): Likewise.
	(context::build_call): Likewise.
	* jit-recording.c: Within namespace gcc::jit::recording...
	(base_call::base_call): New constructor.
	(base_call::write_reproducer_tail_call): New method.
	(call::call): Update for inheritance from base_call.
	(call::replay_into): Provide m_require_tail_call to call
	to new_call.
	(call::write_reproducer): Call write_reproducer_tail_call.
	(call_through_ptr::call_through_ptr): Update for inheritance from
	base_call.
	(call_through_ptr::replay_into): Provide m_require_tail_call to call
	to new_call_through_ptr.
	(recording::call_through_ptr::write_reproducer): Call
	write_reproducer_tail_call.
	* jit-recording.h: Within namespace gcc::jit::recording...
	(rvalue::dyn_cast_base_call): New virtual function.
	(class base_call): New subclass of class rvalue.
	(class call): Inherit from base_call rather than directly from
	rvalue, moving get_precedence and m_args to base_call.
	(class call_through_ptr): Likewise.
	* libgccjit.c (gcc_jit_rvalue_set_bool_require_tail_call): New
	function.
	* libgccjit.h
	(LIBGCCJIT_HAVE_gcc_jit_rvalue_set_bool_require_tail_call): New
	macro.
	(gcc_jit_rvalue_set_bool_require_tail_call): New function.
	* libgccjit.map (LIBGCCJIT_ABI_6): New.
	(gcc_jit_rvalue_set_bool_require_tail_call): Add.

gcc/testsuite/ChangeLog:
	* jit.dg/all-non-failing-tests.h: Add
	test-factorial-must-tail-call.c.
	* jit.dg/test-error-impossible-must-tail-call.c: New test case.
	* jit.dg/test-factorial-must-tail-call.c: New test case.

From-SVN: r236531
This commit is contained in:
David Malcolm 2016-05-20 19:12:49 +00:00 committed by David Malcolm
parent dfbdde160f
commit 15c671a79c
15 changed files with 433 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
gcc/jit/ChangeLog
View File

@ -1,3 +1,47 @@
2016-05-20 David Malcolm <dmalcolm@redhat.com>
* docs/topics/compatibility.rst: Add LIBGCCJIT_ABI_6.
* docs/topics/expressions.rst (Function calls): Add documentation
of gcc_jit_rvalue_set_bool_require_tail_call.
* docs/_build/texinfo/libgccjit.texi: Regenerate.
* jit-common.h (gcc::jit::recording::base_call): Add forward decl.
* jit-playback.c: Within namespace gcc::jit::playback...
(context::build_call) Add "require_tail_call" param and use it
to set CALL_EXPR_MUST_TAIL_CALL.
(context::new_call): Add "require_tail_call" param.
(context::new_call_through_ptr): Likewise.
* jit-playback.h: Within namespace gcc::jit::playback...
(context::new_call: Add "require_tail_call" param.
(context::new_call_through_ptr): Likewise.
(context::build_call): Likewise.
* jit-recording.c: Within namespace gcc::jit::recording...
(base_call::base_call): New constructor.
(base_call::write_reproducer_tail_call): New method.
(call::call): Update for inheritance from base_call.
(call::replay_into): Provide m_require_tail_call to call
to new_call.
(call::write_reproducer): Call write_reproducer_tail_call.
(call_through_ptr::call_through_ptr): Update for inheritance from
base_call.
(call_through_ptr::replay_into): Provide m_require_tail_call to call
to new_call_through_ptr.
(recording::call_through_ptr::write_reproducer): Call
write_reproducer_tail_call.
* jit-recording.h: Within namespace gcc::jit::recording...
(rvalue::dyn_cast_base_call): New virtual function.
(class base_call): New subclass of class rvalue.
(class call): Inherit from base_call rather than directly from
rvalue, moving get_precedence and m_args to base_call.
(class call_through_ptr): Likewise.
* libgccjit.c (gcc_jit_rvalue_set_bool_require_tail_call): New
function.
* libgccjit.h
(LIBGCCJIT_HAVE_gcc_jit_rvalue_set_bool_require_tail_call): New
macro.
(gcc_jit_rvalue_set_bool_require_tail_call): New function.
* libgccjit.map (LIBGCCJIT_ABI_6): New.
(gcc_jit_rvalue_set_bool_require_tail_call): Add.
2016-05-17 David Malcolm <dmalcolm@redhat.com>
* dummy-frontend.c: Include diagnostic.h.

7
gcc/jit/docs/topics/compatibility.rst
View File

@ -135,3 +135,10 @@ entrypoints:
-------------------
``LIBGCCJIT_ABI_5`` covers the addition of
:func:`gcc_jit_context_set_bool_use_external_driver`
.. _LIBGCCJIT_ABI_6:
``LIBGCCJIT_ABI_6``
-------------------
``LIBGCCJIT_ABI_6`` covers the addition of
:func:`gcc_jit_rvalue_set_bool_require_tail_call`

24
gcc/jit/docs/topics/expressions.rst
View File

@ -424,6 +424,30 @@ Function calls
The same caveat as for :c:func:`gcc_jit_context_new_call` applies.
.. function:: void\
gcc_jit_rvalue_set_bool_require_tail_call (gcc_jit_rvalue *call,\
int require_tail_call)
Given an :c:type:`gcc_jit_rvalue *` for a call created through
:c:func:`gcc_jit_context_new_call` or
:c:func:`gcc_jit_context_new_call_through_ptr`, mark/clear the
call as needing tail-call optimization. The optimizer will
attempt to optimize the call into a jump instruction; if it is
unable to do do, an error will be emitted.
This may be useful when implementing functions that use the
continuation-passing style (e.g. for functional programming
languages), in which every function "returns" by calling a
"continuation" function pointer. This call must be
guaranteed to be implemented as a jump, otherwise the program
could consume an arbitrary amount of stack space as it executed.
This entrypoint was added in :ref:`LIBGCCJIT_ABI_6`; you can test for
its presence using
.. code-block:: c
#ifdef LIBGCCJIT_HAVE_gcc_jit_rvalue_set_bool_require_tail_call
Type-coercion
*************

1
gcc/jit/jit-common.h
View File

@ -126,6 +126,7 @@ namespace recording {
class local;
class global;
class param;
class base_call;
class statement;
class case_;

23
gcc/jit/jit-playback.c
View File

@ -854,7 +854,8 @@ playback::rvalue *
playback::context::
build_call (location *loc,
tree fn_ptr,
const auto_vec<rvalue *> *args)
const auto_vec<rvalue *> *args,
bool require_tail_call)
{
vec<tree, va_gc> *tree_args;
vec_alloc (tree_args, args->length ());
@ -868,9 +869,13 @@ build_call (location *loc,
tree fn_type = TREE_TYPE (fn);
tree return_type = TREE_TYPE (fn_type);
return new rvalue (this,
build_call_vec (return_type,
fn_ptr, tree_args));
tree call = build_call_vec (return_type,
fn_ptr, tree_args);
if (require_tail_call)
CALL_EXPR_MUST_TAIL_CALL (call) = 1;
return new rvalue (this, call);
/* see c-typeck.c: build_function_call
which calls build_function_call_vec
@ -890,7 +895,8 @@ playback::rvalue *
playback::context::
new_call (location *loc,
function *func,
const auto_vec<rvalue *> *args)
const auto_vec<rvalue *> *args,
bool require_tail_call)
{
tree fndecl;
@ -902,7 +908,7 @@ new_call (location *loc,
tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
return build_call (loc, fn, args);
return build_call (loc, fn, args, require_tail_call);
}
/* Construct a playback::rvalue instance (wrapping a tree) for a
@ -912,12 +918,13 @@ playback::rvalue *
playback::context::
new_call_through_ptr (location *loc,
rvalue *fn_ptr,
const auto_vec<rvalue *> *args)
const auto_vec<rvalue *> *args,
bool require_tail_call)
{
gcc_assert (fn_ptr);
tree t_fn_ptr = fn_ptr->as_tree ();
return build_call (loc, t_fn_ptr, args);
return build_call (loc, t_fn_ptr, args, require_tail_call);
}
/* Construct a tree for a cast. */

9
gcc/jit/jit-playback.h
View File

@ -133,12 +133,14 @@ public:
rvalue *
new_call (location *loc,
function *func,
const auto_vec<rvalue *> *args);
const auto_vec<rvalue *> *args,
bool require_tail_call);
rvalue *
new_call_through_ptr (location *loc,
rvalue *fn_ptr,
const auto_vec<rvalue *> *args);
const auto_vec<rvalue *> *args,
bool require_tail_call);
rvalue *
new_cast (location *loc,
@ -236,7 +238,8 @@ private:
rvalue *
build_call (location *loc,
tree fn_ptr,
const auto_vec<rvalue *> *args);
const auto_vec<rvalue *> *args,
bool require_tail_call);
tree
build_cast (location *loc,

60
gcc/jit/jit-recording.c
View File

@ -4681,6 +4681,39 @@ recording::cast::write_reproducer (reproducer &r)
r.get_identifier_as_type (get_type ()));
}
/* The implementation of class gcc::jit::recording::base_call. */
/* The constructor for gcc::jit::recording::base_call. */
recording::base_call::base_call (context *ctxt,
location *loc,
type *type_,
int numargs,
rvalue **args)
: rvalue (ctxt, loc, type_),
m_args (),
m_require_tail_call (0)
{
for (int i = 0; i< numargs; i++)
m_args.safe_push (args[i]);
}
/* Subroutine for use by call and call_though_ptr's write_reproducer
methods. */
void
recording::base_call::write_reproducer_tail_call (reproducer &r,
const char *id)
{
if (m_require_tail_call)
{
r.write (" gcc_jit_rvalue_set_bool_require_tail_call (%s, /* gcc_jit_rvalue *call*/\n"
" %i); /* int require_tail_call*/\n",
id,
1);
}
}
/* The implementation of class gcc::jit::recording::call. */
/* The constructor for gcc::jit::recording::call. */
@ -4690,12 +4723,9 @@ recording::call::call (recording::context *ctxt,
recording::function *func,
int numargs,
rvalue **args)
: rvalue (ctxt, loc, func->get_return_type ()),
m_func (func),
m_args ()
: base_call (ctxt, loc, func->get_return_type (), numargs, args),
m_func (func)
{
for (int i = 0; i< numargs; i++)
m_args.safe_push (args[i]);
}
/* Implementation of pure virtual hook recording::memento::replay_into
@ -4711,7 +4741,8 @@ recording::call::replay_into (replayer *r)
set_playback_obj (r->new_call (playback_location (r, m_loc),
m_func->playback_function (),
&playback_args));
&playback_args,
m_require_tail_call));
}
/* Implementation of pure virtual hook recording::rvalue::visit_children
@ -4790,6 +4821,7 @@ recording::call::write_reproducer (reproducer &r)
r.get_identifier (m_func),
m_args.length (),
args_id);
write_reproducer_tail_call (r, id);
}
/* The implementation of class gcc::jit::recording::call_through_ptr. */
@ -4801,14 +4833,12 @@ recording::call_through_ptr::call_through_ptr (recording::context *ctxt,
recording::rvalue *fn_ptr,
int numargs,
rvalue **args)
: rvalue (ctxt, loc,
fn_ptr->get_type ()->dereference ()
->as_a_function_type ()->get_return_type ()),
m_fn_ptr (fn_ptr),
m_args ()
: base_call (ctxt, loc,
fn_ptr->get_type ()->dereference ()
->as_a_function_type ()->get_return_type (),
numargs, args),
m_fn_ptr (fn_ptr)
{
for (int i = 0; i< numargs; i++)
m_args.safe_push (args[i]);
}
/* Implementation of pure virtual hook recording::memento::replay_into
@ -4824,7 +4854,8 @@ recording::call_through_ptr::replay_into (replayer *r)
set_playback_obj (r->new_call_through_ptr (playback_location (r, m_loc),
m_fn_ptr->playback_rvalue (),
&playback_args));
&playback_args,
m_require_tail_call));
}
/* Implementation of pure virtual hook recording::rvalue::visit_children
@ -4907,6 +4938,7 @@ recording::call_through_ptr::write_reproducer (reproducer &r)
r.get_identifier_as_rvalue (m_fn_ptr),
m_args.length (),
args_id);
write_reproducer_tail_call (r, id);
}
/* The implementation of class gcc::jit::recording::array_access. */

46
gcc/jit/jit-recording.h
View File

@ -960,8 +960,9 @@ public:
void set_scope (function *scope);
function *get_scope () const { return m_scope; }
/* Dynamic cast. */
/* Dynamic casts. */
virtual param *dyn_cast_param () { return NULL; }
virtual base_call *dyn_cast_base_call () { return NULL; }
virtual const char *access_as_rvalue (reproducer &r);
@ -1418,7 +1419,36 @@ private:
rvalue *m_rvalue;
};
class call : public rvalue
class base_call : public rvalue
{
public:
base_call (context *ctxt,
location *loc,
type *type_,
int numargs,
rvalue **args);
enum precedence get_precedence () const FINAL OVERRIDE
{
return PRECEDENCE_POSTFIX;
}
base_call *dyn_cast_base_call () FINAL OVERRIDE { return this; }
void set_require_tail_call (bool require_tail_call)
{
m_require_tail_call = require_tail_call;
}
protected:
void write_reproducer_tail_call (reproducer &r, const char *id);
protected:
auto_vec<rvalue *> m_args;
bool m_require_tail_call;
};
class call : public base_call
{
public:
call (context *ctxt,
@ -1434,17 +1464,12 @@ public:
private:
string * make_debug_string () FINAL OVERRIDE;
void write_reproducer (reproducer &r) FINAL OVERRIDE;
enum precedence get_precedence () const FINAL OVERRIDE
{
return PRECEDENCE_POSTFIX;
}
private:
function *m_func;
auto_vec<rvalue *> m_args;
};
class call_through_ptr : public rvalue
class call_through_ptr : public base_call
{
public:
call_through_ptr (context *ctxt,
@ -1460,14 +1485,9 @@ public:
private:
string * make_debug_string () FINAL OVERRIDE;
void write_reproducer (reproducer &r) FINAL OVERRIDE;
enum precedence get_precedence () const FINAL OVERRIDE
{
return PRECEDENCE_POSTFIX;
}
private:
rvalue *m_fn_ptr;
auto_vec<rvalue *> m_args;
};
class array_access : public lvalue

20
gcc/jit/libgccjit.c
View File

@ -2950,3 +2950,23 @@ gcc_jit_timer_print (gcc_jit_timer *timer,
timer->start (TV_TOTAL);
timer->push (TV_JIT_CLIENT_CODE);
}
/* Public entrypoint. See description in libgccjit.h.
After error-checking, the real work is effectively done by the
gcc::jit::base_call::set_require_tail_call setter in jit-recording.h. */
void
gcc_jit_rvalue_set_bool_require_tail_call (gcc_jit_rvalue *rvalue,
int require_tail_call)
{
RETURN_IF_FAIL (rvalue, NULL, NULL, "NULL call");
JIT_LOG_FUNC (rvalue->get_context ()->get_logger ());
/* Verify that it's a call. */
gcc::jit::recording::base_call *call = rvalue->dyn_cast_base_call ();
RETURN_IF_FAIL_PRINTF1 (call, NULL, NULL, "not a call: %s",
rvalue->get_debug_string ());
call->set_require_tail_call (require_tail_call);
}

13
gcc/jit/libgccjit.h
View File

@ -1374,6 +1374,19 @@ extern void
gcc_jit_timer_print (gcc_jit_timer *timer,
FILE *f_out);
#define LIBGCCJIT_HAVE_gcc_jit_rvalue_set_bool_require_tail_call
/* Mark/clear a call as needing tail-call optimization.
This API entrypoint was added in LIBGCCJIT_ABI_6; you can test for its
presence using
#ifdef LIBGCCJIT_HAVE_gcc_jit_rvalue_set_bool_require_tail_call
*/
extern void
gcc_jit_rvalue_set_bool_require_tail_call (gcc_jit_rvalue *call,
int require_tail_call);
#ifdef __cplusplus
}
#endif /* __cplusplus */

5
gcc/jit/libgccjit.map
View File

@ -145,3 +145,8 @@ LIBGCCJIT_ABI_5 {
global:
gcc_jit_context_set_bool_use_external_driver;
} LIBGCCJIT_ABI_4;
LIBGCCJIT_ABI_6 {
global:
gcc_jit_rvalue_set_bool_require_tail_call;
} LIBGCCJIT_ABI_5;

7
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2016-05-20 David Malcolm <dmalcolm@redhat.com>
* jit.dg/all-non-failing-tests.h: Add
test-factorial-must-tail-call.c.
* jit.dg/test-error-impossible-must-tail-call.c: New test case.
* jit.dg/test-factorial-must-tail-call.c: New test case.
2016-05-20 Jakub Jelinek <jakub@redhat.com>
PR fortran/71204

10
gcc/testsuite/jit.dg/all-non-failing-tests.h
View File

@ -105,6 +105,13 @@
#undef create_code
#undef verify_code
/* test-factorial-must-tail-call.c */
#define create_code create_code_factorial_must_tail_call
#define verify_code verify_code_factorial_must_tail_call
#include "test-factorial-must-tail-call.c"
#undef create_code
#undef verify_code
/* test-fibonacci.c */
#define create_code create_code_fibonacci
#define verify_code verify_code_fibonacci
@ -272,6 +279,9 @@ const struct testcase testcases[] = {
{"factorial",
create_code_factorial,
verify_code_factorial},
{"factorial_must_tail_call",
create_code_factorial_must_tail_call,
verify_code_factorial_must_tail_call},
{"fibonacci",
create_code_fibonacci,
verify_code_fibonacci},

93
gcc/testsuite/jit.dg/test-error-impossible-must-tail-call.c Normal file
View File

@ -0,0 +1,93 @@
#include <stdlib.h>
#include <stdio.h>
#include "libgccjit.h"
#include "harness.h"
#ifdef __cplusplus
extern "C" {
#endif
struct box { char dummy[64]; int i; };
extern struct box
returns_struct (int i);
#ifdef __cplusplus
}
#endif
void
create_code (gcc_jit_context *ctxt, void *user_data)
{
/* Let's try to inject the equivalent of:
int test (int i)
{
return [MUST TAIL CALL] returns_struct (i).i;
}
and verify that we get a sane error when the tail call
optimization can't be done. */
gcc_jit_type *char_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_CHAR);
gcc_jit_type *int_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);
/* Declare "struct box. */
gcc_jit_type *array_type =
gcc_jit_context_new_array_type (ctxt, NULL, char_type, 64);
gcc_jit_field *field_dummy =
gcc_jit_context_new_field (ctxt, NULL, array_type, "dummy");
gcc_jit_field *field_i =
gcc_jit_context_new_field (ctxt, NULL, int_type, "i");
gcc_jit_field *fields[2] = {field_dummy, field_i};
gcc_jit_struct *struct_box =
gcc_jit_context_new_struct_type (ctxt, NULL, "box", 2, fields);
/* Declare the imported function. */
gcc_jit_param *called_fn_param_i =
gcc_jit_context_new_param (ctxt, NULL, int_type, "i");
gcc_jit_function *called_fn =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_IMPORTED,
gcc_jit_struct_as_type (struct_box),
"called_function",
1, &called_fn_param_i,
0);
/* Build the test_fn. */
gcc_jit_param *caller_param_i =
gcc_jit_context_new_param (ctxt, NULL, int_type, "i");
gcc_jit_function *test_fn =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_EXPORTED,
int_type,
"test_caller",
1, &caller_param_i,
0);
gcc_jit_rvalue *arg = gcc_jit_param_as_rvalue (caller_param_i);
gcc_jit_rvalue *call =
gcc_jit_context_new_call (ctxt, NULL,
called_fn,
1, &arg);
/* Mark the call as requiring tail-call optimization. */
gcc_jit_rvalue_set_bool_require_tail_call (call, 1);
gcc_jit_block *block = gcc_jit_function_new_block (test_fn, NULL);
gcc_jit_block_end_with_return (block, NULL,
gcc_jit_rvalue_access_field (call, NULL, field_i));
}
void
verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
{
CHECK_VALUE (result, NULL);
CHECK_STRING_VALUE (gcc_jit_context_get_first_error (ctxt),
"cannot tail-call: callee returns a structure");
}

109
gcc/testsuite/jit.dg/test-factorial-must-tail-call.c Normal file
View File

@ -0,0 +1,109 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "libgccjit.h"
#include "harness.h"
void
create_code (gcc_jit_context *ctxt, void *user_data)
{
/* Let's try to inject the equivalent of:
int
my_factorial_must_tail_call (int x)
{
if (x < 2)
return x;
else
return x * my_factorial_must_tail_call (x - 1);
}
and mark the call as requiring tail-call-optimization.
*/
gcc_jit_type *the_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);
gcc_jit_type *return_type = the_type;
gcc_jit_param *x =
gcc_jit_context_new_param (ctxt, NULL, the_type, "x");
gcc_jit_param *params[1] = {x};
gcc_jit_function *func =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_EXPORTED,
return_type,
"my_factorial_must_tail_call",
1, params, 0);
gcc_jit_block *initial =
gcc_jit_function_new_block (func, "initial");
gcc_jit_block *on_true =
gcc_jit_function_new_block (func, "on_true");
gcc_jit_block *on_false =
gcc_jit_function_new_block (func, "on_false");
/* if (x < 2) */
gcc_jit_block_end_with_conditional (
initial, NULL,
gcc_jit_context_new_comparison (
ctxt, NULL,
GCC_JIT_COMPARISON_LT,
gcc_jit_param_as_rvalue (x),
gcc_jit_context_new_rvalue_from_int (
ctxt,
the_type,
2)),
on_true,
on_false);
/* true branch: */
/* return x */
gcc_jit_block_end_with_return (
on_true,
NULL,
gcc_jit_param_as_rvalue (x));
/* false branch: */
gcc_jit_rvalue *x_minus_1 =
gcc_jit_context_new_binary_op (
ctxt, NULL,
GCC_JIT_BINARY_OP_MINUS, the_type,
gcc_jit_param_as_rvalue (x),
gcc_jit_context_new_rvalue_from_int (
ctxt,
the_type,
1));
/* my_factorial_must_tail_call (x - 1) */
gcc_jit_rvalue *call =
gcc_jit_context_new_call (
ctxt, NULL,
func,
1, &x_minus_1);
/* Mark the call as requiring tail-call optimization. */
gcc_jit_rvalue_set_bool_require_tail_call (call, 1);
gcc_jit_block_end_with_return (
on_false,
NULL,
gcc_jit_context_new_binary_op (
ctxt, NULL,
GCC_JIT_BINARY_OP_MULT, the_type,
gcc_jit_param_as_rvalue (x),
call));
}
void
verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
{
typedef int (*my_factorial_fn_type) (int);
CHECK_NON_NULL (result);
my_factorial_fn_type my_factorial_must_tail_call =
(my_factorial_fn_type)gcc_jit_result_get_code (result, "my_factorial_must_tail_call");
CHECK_NON_NULL (my_factorial_must_tail_call);
int val = my_factorial_must_tail_call (10);
note ("my_factorial_must_tail_call returned: %d", val);
CHECK_VALUE (val, 3628800);
}