1*7c3d14c8STreehugger Robot // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2*7c3d14c8STreehugger Robot // RUN: %clangxx_tsan -O2 %s -o %t && %run %t 2>&1 | FileCheck %s
3*7c3d14c8STreehugger Robot // RUN: %clangxx_tsan -O3 %s -o %t && %run %t 2>&1 | FileCheck %s
4*7c3d14c8STreehugger Robot //
5*7c3d14c8STreehugger Robot // Check that load widening is not tsan-hostile.
6*7c3d14c8STreehugger Robot #include <pthread.h>
7*7c3d14c8STreehugger Robot #include <stdio.h>
8*7c3d14c8STreehugger Robot #include <string.h>
9*7c3d14c8STreehugger Robot
10*7c3d14c8STreehugger Robot struct {
11*7c3d14c8STreehugger Robot int i;
12*7c3d14c8STreehugger Robot char c1, c2, c3, c4;
13*7c3d14c8STreehugger Robot } S;
14*7c3d14c8STreehugger Robot
15*7c3d14c8STreehugger Robot int G;
16*7c3d14c8STreehugger Robot
Thread1(void * x)17*7c3d14c8STreehugger Robot void *Thread1(void *x) {
18*7c3d14c8STreehugger Robot G = S.c1 + S.c3;
19*7c3d14c8STreehugger Robot return NULL;
20*7c3d14c8STreehugger Robot }
21*7c3d14c8STreehugger Robot
Thread2(void * x)22*7c3d14c8STreehugger Robot void *Thread2(void *x) {
23*7c3d14c8STreehugger Robot S.c2 = 1;
24*7c3d14c8STreehugger Robot return NULL;
25*7c3d14c8STreehugger Robot }
26*7c3d14c8STreehugger Robot
main()27*7c3d14c8STreehugger Robot int main() {
28*7c3d14c8STreehugger Robot pthread_t t[2];
29*7c3d14c8STreehugger Robot memset(&S, 123, sizeof(S));
30*7c3d14c8STreehugger Robot pthread_create(&t[0], NULL, Thread1, NULL);
31*7c3d14c8STreehugger Robot pthread_create(&t[1], NULL, Thread2, NULL);
32*7c3d14c8STreehugger Robot pthread_join(t[0], NULL);
33*7c3d14c8STreehugger Robot pthread_join(t[1], NULL);
34*7c3d14c8STreehugger Robot fprintf(stderr, "PASS\n");
35*7c3d14c8STreehugger Robot }
36*7c3d14c8STreehugger Robot
37*7c3d14c8STreehugger Robot // CHECK-NOT: WARNING: ThreadSanitizer: data race
38*7c3d14c8STreehugger Robot // CHECK: PASS
39