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comparison gcc/testsuite/c-c++-common/simulate-thread/bitfields-4.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 1830386684a0
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68:561a7518be6b 111:04ced10e8804
1 /* { dg-do link } */
2 /* { dg-options "--param allow-store-data-races=0" } */
3 /* { dg-final { simulate-thread } } */
4
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include "../../gcc.dg/simulate-thread/simulate-thread.h"
8
9 struct bits
10 {
11 char a;
12 int b:7;
13 int c:9;
14 unsigned char d;
15 } *p;
16
17 static int global = 0;
18
19 void simulate_thread_other_threads()
20 {
21 global++;
22 p->d = global % 256;
23 }
24
25 int simulate_thread_step_verify()
26 {
27 if (p->d != global % 256)
28 {
29 printf("FAIL: invalid intermediate result\n");
30 return 1;
31 }
32 return 0;
33 }
34
35 int simulate_thread_final_verify()
36 {
37 if (p->c != 55)
38 {
39 printf("FAIL: invalid final result\n");
40 return 1;
41 }
42 return 0;
43 }
44
45 /* Store into <c> should not clobber <d>. */
46 /* We should not use a 32-bit move to store into p->, but a smaller move. */
47 __attribute__((noinline))
48 void simulate_thread_main()
49 {
50 p -> c = 55;
51 }
52
53
54 int main()
55 {
56 p = (struct bits *) calloc (1, sizeof (struct bits));
57 simulate_thread_main();
58 simulate_thread_done();
59 return 0;
60 }