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// RUN: %clang_cc1 -fsyntax-only \
// RUN: -fno-signed-char \
// RUN: -Wtautological-unsigned-zero-compare \
// RUN: -Wtautological-unsigned-char-zero-compare \
// RUN: -verify=unsigned %s
// RUN: %clang_cc1 -fsyntax-only \
// RUN: -Wtautological-unsigned-zero-compare \
// RUN: -Wtautological-unsigned-char-zero-compare \
// RUN: -verify=signed %s
void f(char c, unsigned char uc, signed char cc) {
if (c < 0)
return;
// unsigned-warning@-2 {{comparison of char expression < 0 is always false, since char is interpreted as unsigned}}
if (uc < 0)
return;
// unsigned-warning@-2 {{comparison of unsigned expression < 0 is always false}}
// signed-warning@-3 {{comparison of unsigned expression < 0 is always false}}
if (cc < 0)
return;
// Promoted to integer expressions should not warn.
if (c - 4 < 0)
return;
}
void ref(char &c, unsigned char &uc, signed char &cc) {
if (c < 0)
return;
// unsigned-warning@-2 {{comparison of char expression < 0 is always false, since char is interpreted as unsigned}}
if (uc < 0)
return;
// unsigned-warning@-2 {{comparison of unsigned expression < 0 is always false}}
// signed-warning@-3 {{comparison of unsigned expression < 0 is always false}}
if (cc < 0)
return;
// Promoted to integer expressions should not warn.
if (c - 4 < 0)
return;
}
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