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[CLANG] Add warning when INF or NAN are used in a binary operation or…
… as function argument in fast math mode. (llvm#76873) Check for operations using INF or NaN when in ffast-math mode and generate a warning.
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,176 @@ | ||
| // RUN: %clang_cc1 -x c++ -verify=no-inf-no-nan -triple powerpc64le-unknown-unknown %s \ | ||
| // RUN: -menable-no-infs -menable-no-nans | ||
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| // RUN: %clang_cc1 -x c++ -verify=no-fast -triple powerpc64le-unknown-unknown %s | ||
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| // RUN: %clang_cc1 -x c++ -verify=no-inf -triple powerpc64le-unknown-unknown %s \ | ||
| // RUN: -menable-no-infs | ||
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| // RUN: %clang_cc1 -x c++ -verify=no-nan -triple powerpc64le-unknown-unknown %s \ | ||
| // RUN: -menable-no-nans | ||
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| // no-fast-no-diagnostics | ||
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| int isunorderedf (float x, float y); | ||
| extern "C++" { | ||
| namespace std __attribute__((__visibility__("default"))) { | ||
| bool | ||
| isinf(float __x); | ||
| bool | ||
| isinf(double __x); | ||
| bool | ||
| isinf(long double __x); | ||
| bool | ||
| isnan(float __x); | ||
| bool | ||
| isnan(double __x); | ||
| bool | ||
| isnan(long double __x); | ||
| bool | ||
| isfinite(float __x); | ||
| bool | ||
| isfinite(double __x); | ||
| bool | ||
| isfinte(long double __x); | ||
| bool | ||
| isunordered(float __x, float __y); | ||
| bool | ||
| isunordered(double __x, double __y); | ||
| bool | ||
| isunordered(long double __x, long double __y); | ||
| } // namespace ) | ||
| } | ||
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| #define NAN (__builtin_nanf("")) | ||
| #define INFINITY (__builtin_inff()) | ||
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| template <class _Ty> | ||
| class numeric_limits { | ||
| public: | ||
| [[nodiscard]] static constexpr _Ty infinity() noexcept { | ||
| return _Ty(); | ||
| } | ||
| }; | ||
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| template <> | ||
| class numeric_limits<float> { | ||
| public: | ||
| [[nodiscard]] static constexpr float infinity() noexcept { | ||
| return __builtin_huge_val(); | ||
| } | ||
| }; | ||
| template <> | ||
| class numeric_limits<double> { | ||
| public: | ||
| [[nodiscard]] static constexpr double infinity() noexcept { | ||
| return __builtin_huge_val(); | ||
| } | ||
| }; | ||
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| int compareit(float a, float b) { | ||
| volatile int i, j, k, l, m, n, o, p; | ||
| // no-inf-no-nan-warning@+2 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| i = a == INFINITY; | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| j = INFINITY == a; | ||
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| // no-inf-no-nan-warning@+4 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+3 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+2 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| i = a == NAN; | ||
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| // no-inf-no-nan-warning@+4 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+3 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+2 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| j = NAN == a; | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| j = INFINITY <= a; | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| j = INFINITY < a; | ||
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| // no-inf-no-nan-warning@+4 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+3 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+2 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| j = a > NAN; | ||
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| // no-inf-no-nan-warning@+4 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+3 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+2 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| j = a >= NAN; | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| k = std::isinf(a); | ||
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| // no-inf-no-nan-warning@+2 {{use of NaN is undefined behavior due to the currently enabled floating-point option}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| l = std::isnan(a); | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| o = std::isfinite(a); | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| m = __builtin_isinf(a); | ||
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| // no-inf-no-nan-warning@+2 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| n = __builtin_isnan(a); | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| p = __builtin_isfinite(a); | ||
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| // These should NOT warn, since they are not using NaN or infinity. | ||
| j = a > 1.1; | ||
| j = b < 1.1; | ||
| j = a >= 1.1; | ||
| j = b <= 1.1; | ||
| j = isunorderedf(a, b); | ||
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| // no-inf-no-nan-warning@+4 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+3 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+2 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| j = isunorderedf(a, NAN); | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| j = isunorderedf(a, INFINITY); | ||
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| // no-inf-no-nan-warning@+6 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+5 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+4 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+3 {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+2 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| i = std::isunordered(a, NAN); | ||
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| // no-inf-no-nan-warning@+4 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-no-nan-warning@+3 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+2 {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-nan-warning@+1 {{use of NaN is undefined behavior due to the currently enabled floating-point options}} | ||
| i = std::isunordered(a, INFINITY); | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| double y = i * numeric_limits<double>::infinity(); | ||
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| // no-inf-no-nan-warning@+2 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| // no-inf-warning@+1 {{use of infinity is undefined behavior due to the currently enabled floating-point options}} | ||
| j = numeric_limits<float>::infinity(); | ||
| return 0; | ||
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| } |
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