Viewing file:  test-calling-external-function.c (2.99 KB) -rw-r--r--
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#include <stdlib.h>
#include <stdio.h>
#include "libgccjit.h"
#include "harness.h"
#ifdef __cplusplus
extern "C" {
#endif
extern void
called_function (int i, int j, int k);
#ifdef __cplusplus
}
#endif
void
create_code (gcc_jit_context *ctxt, void *user_data)
{
/* Let's try to inject the equivalent of:
extern void called_function (int i, int j, int k);
void
test_caller (int a)
{
called_function (a * 3, a * 4, a * 5);
}
*/
int i;
gcc_jit_type *void_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_VOID);
gcc_jit_type *int_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);
/* Declare the imported function. */
gcc_jit_param *params[3];
params[0] =
gcc_jit_context_new_param (ctxt, NULL, int_type, "i");
params[1] =
gcc_jit_context_new_param (ctxt, NULL, int_type, "j");
params[2] =
gcc_jit_context_new_param (ctxt, NULL, int_type, "k");
gcc_jit_function *called_fn =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_IMPORTED,
void_type,
"called_function",
3, params,
0);
/* Build the test_fn. */
gcc_jit_param *param_a =
gcc_jit_context_new_param (ctxt, NULL, int_type, "a");
gcc_jit_function *test_fn =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_EXPORTED,
void_type,
"test_caller",
1, ¶m_a,
0);
/* "a * 3, a * 4, a * 5" */
gcc_jit_rvalue *args[3];
for (i = 0; i < 3; i++)
args[i] =
gcc_jit_context_new_binary_op (
ctxt, NULL,
GCC_JIT_BINARY_OP_MULT,
int_type,
gcc_jit_param_as_rvalue (param_a),
gcc_jit_context_new_rvalue_from_int (
ctxt,
int_type,
(i + 3) ));
gcc_jit_block *block = gcc_jit_function_new_block (test_fn, NULL);
gcc_jit_block_add_eval (
block, NULL,
gcc_jit_context_new_call (ctxt,
NULL,
called_fn,
3, args));
gcc_jit_block_end_with_void_return (block, NULL);
}
static int called_with[3];
extern void
called_function (int i, int j, int k)
{
called_with[0] = i;
called_with[1] = j;
called_with[2] = k;
}
void
verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
{
typedef void (*fn_type) (int);
CHECK_NON_NULL (result);
fn_type test_caller =
(fn_type)gcc_jit_result_get_code (result, "test_caller");
CHECK_NON_NULL (test_caller);
called_with[0] = 0;
called_with[1] = 0;
called_with[2] = 0;
/* Call the JIT-generated function. */
test_caller (5);
/* Verify that it correctly called "called_function". */
CHECK_VALUE (called_with[0], 15);
CHECK_VALUE (called_with[1], 20);
CHECK_VALUE (called_with[2], 25);
}
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