forked from OSchip/llvm-project
293 lines
5.7 KiB
C
293 lines
5.7 KiB
C
// RUN: %clang_cc1 -fsyntax-only \
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// RUN: -Wtautological-unsigned-zero-compare \
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// RUN: -verify %s
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// RUN: %clang_cc1 -fsyntax-only \
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// RUN: -verify=silence %s
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// RUN: %clang_cc1 -fsyntax-only \
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// RUN: -Wtautological-unsigned-zero-compare \
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// RUN: -verify -x c++ %s
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// RUN: %clang_cc1 -fsyntax-only \
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// RUN: -verify=silence -x c++ %s
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unsigned uvalue(void);
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signed int svalue(void);
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#define macro(val) val
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#ifdef __cplusplus
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template<typename T>
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void TFunc() {
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// Make sure that we do warn for normal variables in template functions !
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unsigned char c = svalue();
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if (c < 0) // expected-warning {{comparison of unsigned expression < 0 is always false}}
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return;
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if (c < macro(0))
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return;
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T v = svalue();
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if (v < 0)
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return;
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}
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#endif
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int main()
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{
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#ifdef __cplusplus
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TFunc<unsigned char>();
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TFunc<unsigned short>();
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#endif
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short s = svalue();
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unsigned un = uvalue();
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// silence-no-diagnostics
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// Note: both sides are promoted to unsigned long prior to the comparison.
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if (s == 0UL)
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return 0;
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if (s != 0UL)
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return 0;
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if (s < 0UL) // expected-warning {{comparison of unsigned expression < 0 is always false}}
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return 0;
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if (s <= 0UL)
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return 0;
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if (s > 0UL)
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return 0;
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if (s >= 0UL) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
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return 0;
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if (0UL == s)
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return 0;
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if (0UL != s)
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return 0;
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if (0UL < s)
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return 0;
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if (0UL <= s) // expected-warning {{comparison of 0 <= unsigned expression is always true}}
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return 0;
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if (0UL > s) // expected-warning {{comparison of 0 > unsigned expression is always false}}
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return 0;
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if (0UL >= s)
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return 0;
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if (un == 0)
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return 0;
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if (un != 0)
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return 0;
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if (un < 0) // expected-warning {{comparison of unsigned expression < 0 is always false}}
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return 0;
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if (un <= 0)
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return 0;
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if (un > 0)
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return 0;
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if (un >= 0) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
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return 0;
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if (0 == un)
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return 0;
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if (0 != un)
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return 0;
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if (0 < un)
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return 0;
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if (0 <= un) // expected-warning {{comparison of 0 <= unsigned expression is always true}}
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return 0;
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if (0 > un) // expected-warning {{comparison of 0 > unsigned expression is always false}}
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return 0;
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if (0 >= un)
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return 0;
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if (un == 0UL)
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return 0;
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if (un != 0UL)
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return 0;
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if (un < 0UL) // expected-warning {{comparison of unsigned expression < 0 is always false}}
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return 0;
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if (un <= 0UL)
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return 0;
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if (un > 0UL)
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return 0;
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if (un >= 0UL) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
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return 0;
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if (0UL == un)
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return 0;
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if (0UL != un)
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return 0;
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if (0UL < un)
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return 0;
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if (0UL <= un) // expected-warning {{comparison of 0 <= unsigned expression is always true}}
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return 0;
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if (0UL > un) // expected-warning {{comparison of 0 > unsigned expression is always false}}
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return 0;
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if (0UL >= un)
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return 0;
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signed int a = svalue();
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if (a == 0)
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return 0;
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if (a != 0)
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return 0;
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if (a < 0)
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return 0;
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if (a <= 0)
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return 0;
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if (a > 0)
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return 0;
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if (a >= 0)
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return 0;
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if (0 == a)
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return 0;
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if (0 != a)
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return 0;
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if (0 < a)
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return 0;
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if (0 <= a)
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return 0;
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if (0 > a)
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return 0;
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if (0 >= a)
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return 0;
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if (a == 0UL)
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return 0;
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if (a != 0UL)
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return 0;
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if (a < 0UL) // expected-warning {{comparison of unsigned expression < 0 is always false}}
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return 0;
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if (a <= 0UL)
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return 0;
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if (a > 0UL)
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return 0;
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if (a >= 0UL) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
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return 0;
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if (0UL == a)
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return 0;
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if (0UL != a)
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return 0;
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if (0UL < a)
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return 0;
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if (0UL <= a) // expected-warning {{comparison of 0 <= unsigned expression is always true}}
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return 0;
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if (0UL > a) // expected-warning {{comparison of 0 > unsigned expression is always false}}
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return 0;
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if (0UL >= a)
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return 0;
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float fl = 0;
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if (fl == 0)
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return 0;
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if (fl != 0)
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return 0;
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if (fl < 0)
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return 0;
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if (fl <= 0)
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return 0;
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if (fl > 0)
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return 0;
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if (fl >= 0)
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return 0;
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if (0 == fl)
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return 0;
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if (0 != fl)
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return 0;
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if (0 < fl)
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return 0;
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if (0 <= fl)
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return 0;
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if (0 > fl)
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return 0;
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if (0 >= fl)
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return 0;
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if (fl == 0UL)
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return 0;
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if (fl != 0UL)
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return 0;
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if (fl < 0UL)
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return 0;
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if (fl <= 0UL)
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return 0;
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if (fl > 0UL)
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return 0;
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if (fl >= 0UL)
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return 0;
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if (0UL == fl)
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return 0;
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if (0UL != fl)
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return 0;
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if (0UL < fl)
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return 0;
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if (0UL <= fl)
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return 0;
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if (0UL > fl)
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return 0;
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if (0UL >= fl)
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return 0;
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double dl = 0;
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if (dl == 0)
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return 0;
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if (dl != 0)
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return 0;
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if (dl < 0)
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return 0;
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if (dl <= 0)
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return 0;
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if (dl > 0)
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return 0;
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if (dl >= 0)
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return 0;
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if (0 == dl)
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return 0;
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if (0 != dl)
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return 0;
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if (0 < dl)
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return 0;
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if (0 <= dl)
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return 0;
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if (0 > dl)
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return 0;
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if (0 >= dl)
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return 0;
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if (dl == 0UL)
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return 0;
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if (dl != 0UL)
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return 0;
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if (dl < 0UL)
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return 0;
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if (dl <= 0UL)
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return 0;
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if (dl > 0UL)
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return 0;
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if (dl >= 0UL)
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return 0;
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if (0UL == dl)
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return 0;
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if (0UL != dl)
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return 0;
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if (0UL < dl)
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return 0;
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if (0UL <= dl)
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return 0;
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if (0UL > dl)
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return 0;
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if (0UL >= dl)
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return 0;
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return 1;
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}
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