Viewing file:  test-accessing-struct.c (2.79 KB) -rw-r--r--
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#include <stdlib.h>
#include <stdio.h>
#include "libgccjit.h"
#include "harness.h"
struct foo
{
int x;
int y;
int z;
};
void
create_code (gcc_jit_context *ctxt, void *user_data)
{
/* Let's try to inject the equivalent of:
void
test_access (struct foo *f)
{
f->z = f->x * f->y;
}
*/
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);
gcc_jit_field *x =
gcc_jit_context_new_field (ctxt,
NULL,
int_type,
"x");
gcc_jit_field *y =
gcc_jit_context_new_field (ctxt,
NULL,
int_type,
"y");
gcc_jit_field *z =
gcc_jit_context_new_field (ctxt,
NULL,
int_type,
"z");
gcc_jit_field *fields[] = {x, y, z};
gcc_jit_struct *struct_type =
gcc_jit_context_new_struct_type (ctxt, NULL, "foo", 3, fields);
gcc_jit_type *ptr_type =
gcc_jit_type_get_pointer (gcc_jit_struct_as_type (struct_type));
/* Build the test function. */
gcc_jit_param *param_f =
gcc_jit_context_new_param (ctxt, NULL, ptr_type, "f");
gcc_jit_function *test_fn =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_EXPORTED,
void_type,
"test_access",
1, ¶m_f,
0);
/* f->x * f->y */
gcc_jit_rvalue *sum =
gcc_jit_context_new_binary_op (
ctxt, NULL,
GCC_JIT_BINARY_OP_MULT,
int_type,
gcc_jit_lvalue_as_rvalue (
gcc_jit_rvalue_dereference_field (
gcc_jit_param_as_rvalue (param_f),
NULL,
x)),
gcc_jit_lvalue_as_rvalue (
gcc_jit_rvalue_dereference_field (
gcc_jit_param_as_rvalue (param_f),
NULL,
y)));
/* f->z = ... */
gcc_jit_block *block = gcc_jit_function_new_block (test_fn, NULL);
gcc_jit_block_add_assignment (
block,
NULL,
gcc_jit_rvalue_dereference_field (
gcc_jit_param_as_rvalue (param_f),
NULL,
z),
sum);
gcc_jit_block_end_with_void_return (block, NULL);
}
void
verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
{
typedef void (*fn_type) (struct foo *);
CHECK_NON_NULL (result);
fn_type test_access =
(fn_type)gcc_jit_result_get_code (result, "test_access");
CHECK_NON_NULL (test_access);
struct foo tmp;
tmp.x = 5;
tmp.y = 7;
tmp.z = 0;
/* Call the JIT-generated function. */
test_access (&tmp);
/* Verify that the code correctly modified the field "z". */
CHECK_VALUE (tmp.z, 35);
}
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