fune/build/clang-plugin/tests/TestNANTestingExpr.cpp
Ehsan Akhgari 7afb1a818c Bug 927430 - Add a static analysis to detect is-NaN testing using |x == x| or |x != x|; r=jrmuizel
--HG--
extra : rebase_source : d80c866ecc7e5f415c83db757e82bd4bac299b67
2014-12-21 12:33:25 -05:00

16 lines
923 B
C++

void test(bool x);
void foo() {
float f, f2;
typedef double mydouble;
mydouble d;
double d2;
test(f == f); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
test(d == d); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
test(f != f); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
test(d != d); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
test(f != d);
test(d == (d - f));
test(f == f2);
test(d == d2);
test(d + 1 == d);
}