128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
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// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -fsyntax-only \
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// RUN: -Wtautological-unsigned-enum-zero-compare \
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// RUN: -verify=unsigned,unsigned-signed %s
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// RUN: %clang_cc1 -triple=x86_64-pc-win32 -fsyntax-only \
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// RUN: -Wtautological-unsigned-enum-zero-compare \
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// RUN: -verify=unsigned-signed %s
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// RUN: %clang_cc1 -triple=x86_64-pc-win32 -fsyntax-only \
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// RUN: -verify=silence %s
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// Okay, this is where it gets complicated.
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// Then default enum sigdness is target-specific.
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// On windows, it is signed by default. We do not want to warn in that case.
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int main() {
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enum A { A_a = 0 };
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enum A a;
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enum B { B_a = -1 };
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enum B b;
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// silence-no-diagnostics
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if (a < 0) // unsigned-warning {{comparison of unsigned enum expression < 0 is always false}}
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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 > 0)
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return 0;
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if (0 <= a) // unsigned-warning {{comparison of 0 <= unsigned enum expression is always true}}
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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) // unsigned-warning {{comparison of 0 > unsigned enum expression is always false}}
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return 0;
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if (a >= 0) // unsigned-warning {{comparison of unsigned enum expression >= 0 is always true}}
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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 < 0U) // unsigned-signed-warning {{comparison of unsigned enum expression < 0 is always false}}
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return 0;
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if (0U >= a)
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return 0;
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if (a > 0U)
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return 0;
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if (0U <= a) // unsigned-signed-warning {{comparison of 0 <= unsigned enum expression is always true}}
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return 0;
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if (a <= 0U)
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return 0;
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if (0U > a) // unsigned-signed-warning {{comparison of 0 > unsigned enum expression is always false}}
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return 0;
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if (a >= 0U) // unsigned-signed-warning {{comparison of unsigned enum expression >= 0 is always true}}
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return 0;
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if (0U < a)
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return 0;
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if (b < 0)
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return 0;
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if (0 >= b)
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return 0;
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if (b > 0)
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return 0;
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if (0 <= b)
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return 0;
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if (b <= 0)
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return 0;
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if (0 > b)
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return 0;
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if (b >= 0)
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return 0;
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if (0 < b)
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return 0;
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if (b < 0U) // unsigned-signed-warning {{comparison of unsigned enum expression < 0 is always false}}
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return 0;
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if (0U >= b)
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return 0;
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if (b > 0U)
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return 0;
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if (0U <= b) // unsigned-signed-warning {{comparison of 0 <= unsigned enum expression is always true}}
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return 0;
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if (b <= 0U)
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return 0;
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if (0U > b) // unsigned-signed-warning {{comparison of 0 > unsigned enum expression is always false}}
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return 0;
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if (b >= 0U) // unsigned-signed-warning {{comparison of unsigned enum expression >= 0 is always true}}
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return 0;
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if (0U < b)
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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 (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 (a == 0U)
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return 0;
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if (0U != a)
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return 0;
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if (a != 0U)
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return 0;
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if (0U == a)
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return 0;
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if (b == 0)
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return 0;
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if (0 != b)
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return 0;
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if (b != 0)
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return 0;
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if (0 == b)
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return 0;
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if (b == 0U)
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return 0;
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if (0U != b)
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return 0;
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if (b != 0U)
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return 0;
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if (0U == b)
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return 0;
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return 1;
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}
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