llvm-project/clang/test/SemaObjCXX/null_objc_pointer.mm

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// RUN: %clang_cc1 -fsyntax-only -verify -Wnull-arithmetic %s
#define NULL __null
@interface X
@end
void f() {
bool b;
X *d;
b = d < NULL || NULL < d || d > NULL || NULL > d;
b = d <= NULL || NULL <= d || d >= NULL || NULL >= d;
b = d == NULL || NULL == d || d != NULL || NULL != d;
}