1 // RUN: %clang -fsanitize=implicit-signed-integer-truncation %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
2
3 #include <stdint.h>
4
main()5 int main() {
6 // CHECK-NOT: implicit-conversion
7
8 // Negative tests. Even if they produce unexpected results, this sanitizer does not care.
9 int8_t n0 = (~((uint32_t)(0))); // ~0 -> -1, but do not warn.
10 uint8_t n2 = 128;
11 uint8_t n3 = 255;
12 // Bools do not count
13 _Bool b0 = (~((uint32_t)(0)));
14 _Bool b1 = 255;
15
16 // Explicit and-ing of bits will silence it.
17 uint8_t nc0 = ((int32_t)(-1)) & 255;
18
19 // Positive tests.
20 uint8_t t0 = (int32_t)(-1);
21 // CHECK: implicit-conversion by 0x{{[[:xdigit:]]+$}}
22 // CHECK-NOT: implicit-conversion
23
24 return 0;
25 }
26