1 #include <stdlib.h>
2 #include <stdio.h>
3
4 #include "libgccjit.h"
5
6 #include "harness.h"
7
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11
12 struct box { char dummy[64]; int i; };
13
14 extern struct box
15 returns_struct (int i);
16
17 #ifdef __cplusplus
18 }
19 #endif
20
21 void
create_code(gcc_jit_context * ctxt,void * user_data)22 create_code (gcc_jit_context *ctxt, void *user_data)
23 {
24 /* Let's try to inject the equivalent of:
25
26 int test (int i)
27 {
28 return [MUST TAIL CALL] returns_struct (i).i;
29 }
30
31 and verify that we get a sane error when the tail call
32 optimization can't be done. */
33
34 gcc_jit_type *char_type =
35 gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_CHAR);
36 gcc_jit_type *int_type =
37 gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);
38
39 /* Declare "struct box. */
40 gcc_jit_type *array_type =
41 gcc_jit_context_new_array_type (ctxt, NULL, char_type, 64);
42 gcc_jit_field *field_dummy =
43 gcc_jit_context_new_field (ctxt, NULL, array_type, "dummy");
44 gcc_jit_field *field_i =
45 gcc_jit_context_new_field (ctxt, NULL, int_type, "i");
46 gcc_jit_field *fields[2] = {field_dummy, field_i};
47 gcc_jit_struct *struct_box =
48 gcc_jit_context_new_struct_type (ctxt, NULL, "box", 2, fields);
49
50 /* Declare the imported function. */
51 gcc_jit_param *called_fn_param_i =
52 gcc_jit_context_new_param (ctxt, NULL, int_type, "i");
53 gcc_jit_function *called_fn =
54 gcc_jit_context_new_function (ctxt, NULL,
55 GCC_JIT_FUNCTION_IMPORTED,
56 gcc_jit_struct_as_type (struct_box),
57 "called_function",
58 1, &called_fn_param_i,
59 0);
60
61 /* Build the test_fn. */
62 gcc_jit_param *caller_param_i =
63 gcc_jit_context_new_param (ctxt, NULL, int_type, "i");
64 gcc_jit_function *test_fn =
65 gcc_jit_context_new_function (ctxt, NULL,
66 GCC_JIT_FUNCTION_EXPORTED,
67 int_type,
68 "test_caller",
69 1, &caller_param_i,
70 0);
71 gcc_jit_rvalue *arg = gcc_jit_param_as_rvalue (caller_param_i);
72
73 gcc_jit_rvalue *call =
74 gcc_jit_context_new_call (ctxt, NULL,
75 called_fn,
76 1, &arg);
77
78 /* Mark the call as requiring tail-call optimization. */
79 gcc_jit_rvalue_set_bool_require_tail_call (call, 1);
80
81 gcc_jit_block *block = gcc_jit_function_new_block (test_fn, NULL);
82 gcc_jit_block_end_with_return (block, NULL,
83 gcc_jit_rvalue_access_field (call, NULL, field_i));
84 }
85
86 void
verify_code(gcc_jit_context * ctxt,gcc_jit_result * result)87 verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
88 {
89 CHECK_VALUE (result, NULL);
90
91 CHECK_STRING_VALUE (gcc_jit_context_get_first_error (ctxt),
92 "cannot tail-call: callee returns a structure");
93 }
94