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// RUN: %clang_cc1 -fsyntax-only -DTEST -verify %s
// RUN: %clang_cc1 -fsyntax-only -Wno-tautological-unsigned-zero-compare -verify %s
unsigned value(void);
int main() {
unsigned un = value();
#ifdef TEST
if (un < 0) // expected-warning {{comparison of unsigned expression < 0 is always false}}
return 0;
if (un >= 0) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
return 0;
if (0 <= un) // expected-warning {{comparison of 0 <= unsigned expression is always true}}
return 0;
if (0 > un) // expected-warning {{comparison of 0 > unsigned expression is always false}}
return 0;
if (un < 0U) // expected-warning {{comparison of unsigned expression < 0 is always false}}
return 0;
if (un >= 0U) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
return 0;
if (0U <= un) // expected-warning {{comparison of 0 <= unsigned expression is always true}}
return 0;
if (0U > un) // expected-warning {{comparison of 0 > unsigned expression is always false}}
return 0;
#else
// expected-no-diagnostics
if (un < 0)
return 0;
if (un >= 0)
return 0;
if (0 <= un)
return 0;
if (0 > un)
return 0;
if (un < 0U)
return 0;
if (un >= 0U)
return 0;
if (0U <= un)
return 0;
if (0U > un)
return 0;
#endif
return 1;
}
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