1// RUN: %clangxx_msan -O0 %s -o %t && not %run %t >%t.out 2>&1
2// RUN: FileCheck %s < %t.out
3// RUN: %clangxx_msan -O1 %s -o %t && not %run %t >%t.out 2>&1
4// RUN: FileCheck %s < %t.out
5// RUN: %clangxx_msan -O2 %s -o %t && not %run %t >%t.out 2>&1
6// RUN: FileCheck %s < %t.out
7// RUN: %clangxx_msan -O3 %s -o %t && not %run %t >%t.out 2>&1
8// RUN: FileCheck %s < %t.out
9
10#include <stdlib.h>
11int main(int argc, char **argv) {
12 int x;
13 int *volatile p = &x;
14 int z = *p ? 1 : 0;
15 if (z)
16 exit(status: 0);
17 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
18 // CHECK: {{#0 0x.* in main .*select.cpp:}}[[@LINE-3]]
19
20 // CHECK: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*select.cpp:.* main}}
21 return 0;
22}
23

source code of compiler-rt/test/msan/select.cpp