blob: ff9d71e08754c24af9bbf551f0d6851f56ecfbeb (
plain)
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
|
/* { dg-do link } */
/* { dg-options "--param allow-store-data-races=0" } */
/* { dg-final { simulate-thread } } */
#include <stdio.h>
#include "simulate-thread.h"
/* This file tests that speculative store movement out of a loop doesn't
happen. This is disallowed when --param allow-store-data-races is 0. */
int global = 100;
/* Other thread makes sure global is 100 before the next instruction is
* exceuted. */
void simulate_thread_other_threads()
{
global = 100;
}
int simulate_thread_step_verify()
{
if (global != 100)
{
printf("FAIL: global variable was assigned to. \n");
return 1;
}
return 0;
}
int simulate_thread_final_verify()
{
return 0;
}
/* The variable global should never be assigned if func(0) is called.
This tests store movement out of loop thats never executed. */
void test (int y)
{
int x;
for (x=0; x< y; x++)
{
global = y; /* This should never speculatively execute. */
}
}
__attribute__((noinline))
void simulate_thread_main()
{
test(0);
simulate_thread_done();
}
__attribute__((noinline))
int main()
{
simulate_thread_main();
return 0;
}
|
