1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
| // RUN: %clang_builtins %s %librt -fnested-functions -o %t && %run %t
// REQUIRES: librt_has_trampoline_setup
/* ===-- trampoline_setup_test.c - Test __trampoline_setup -----------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
* ===----------------------------------------------------------------------===
*/
#include <stdio.h>
#include <string.h>
#include <stdint.h>
/*
* Tests nested functions
* The ppc compiler generates a call to __trampoline_setup
* The i386 and x86_64 compilers generate a call to ___enable_execute_stack
*/
/*
* Note that, nested functions are not ISO C and are not supported in Clang.
*/
#if !defined(__clang__)
typedef int (*nested_func_t)(int x);
nested_func_t proc;
int main() {
/* Some locals */
int c = 10;
int d = 7;
/* Define a nested function: */
int bar(int x) { return x*5 + c*d; };
/* Assign global to point to nested function
* (really points to trampoline). */
proc = bar;
/* Invoke nested function: */
c = 4;
if ( (*proc)(3) != 43 )
return 1;
d = 5;
if ( (*proc)(4) != 40 )
return 1;
/* Success. */
return 0;
}
#else
int main() {
printf("skipped\n");
return 0;
}
#endif
|