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// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
// RUN: %clangxx_tsan -O2 %s -o %t && %t 2>&1 | FileCheck %s
// RUN: %clangxx_tsan -O3 %s -o %t && %t 2>&1 | FileCheck %s
//
// Check that load widening is not tsan-hostile.
#include <pthread.h>
#include <stdio.h>
#include <string.h>
struct {
int i;
char c1, c2, c3, c4;
} S;
int G;
void *Thread1(void *x) {
G = S.c1 + S.c3;
return NULL;
}
void *Thread2(void *x) {
S.c2 = 1;
return NULL;
}
int main() {
pthread_t t[2];
memset(&S, 123, sizeof(S));
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
printf("PASS\n");
}
// CHECK-NOT: WARNING: ThreadSanitizer: data race
// CHECK: PASS
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