llvm-project/compiler-rt/test/ubsan_minimal/TestCases/implicit-integer-sign-change.c

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// RUN: %clang -fsanitize=implicit-integer-sign-change %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
#include <stdint.h>
int main() {
// CHECK-NOT: implicit-conversion
// Explicitly casting hides it,
int32_t n0 = (int32_t)(~((uint32_t)0));
// Positive tests.
int32_t t0 = (~((uint32_t)0));
// CHECK: implicit-conversion
// CHECK-NOT: implicit-conversion
return 0;
}