1 files changed, 54 insertions, 12 deletions

diff --git a/lib/libcxx/include/math.h b/lib/libcxx/include/math.h
index 8c30ba85d22..3cc72aa2791 100644
--- a/lib/libcxx/include/math.h
+++ b/lib/libcxx/include/math.h
@@ -314,7 +314,7 @@ extern "C++" {
 #ifdef signbit
 
 template <class _A1>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_signbit(_A1 __lcpp_x) _NOEXCEPT
 {
@@ -376,7 +376,7 @@ signbit(_A1) _NOEXCEPT
 #ifdef fpclassify
 
 template <class _A1>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 int
 __libcpp_fpclassify(_A1 __lcpp_x) _NOEXCEPT
 {
@@ -422,7 +422,7 @@ fpclassify(_A1 __lcpp_x) _NOEXCEPT
 #ifdef isfinite
 
 template <class _A1>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isfinite(_A1 __lcpp_x) _NOEXCEPT
 {
@@ -456,7 +456,7 @@ isfinite(_A1) _NOEXCEPT
 #ifdef isinf
 
 template <class _A1>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isinf(_A1 __lcpp_x) _NOEXCEPT
 {
@@ -483,6 +483,20 @@ typename std::enable_if<
 isinf(_A1) _NOEXCEPT
 { return false; }
 
+#ifdef _LIBCPP_PREFERRED_OVERLOAD
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+isinf(float __lcpp_x) _NOEXCEPT { return __libcpp_isinf(__lcpp_x); }
+
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_PREFERRED_OVERLOAD
+bool
+isinf(double __lcpp_x) _NOEXCEPT { return __libcpp_isinf(__lcpp_x); }
+
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+isinf(long double __lcpp_x) _NOEXCEPT { return __libcpp_isinf(__lcpp_x); }
+#endif
+
 #endif  // isinf
 
 // isnan
@@ -490,7 +504,7 @@ isinf(_A1) _NOEXCEPT
 #ifdef isnan
 
 template <class _A1>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isnan(_A1 __lcpp_x) _NOEXCEPT
 {
@@ -513,6 +527,20 @@ typename std::enable_if<std::is_integral<_A1>::value, bool>::type
 isnan(_A1) _NOEXCEPT
 { return false; }
 
+#ifdef _LIBCPP_PREFERRED_OVERLOAD
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+isnan(float __lcpp_x) _NOEXCEPT { return __libcpp_isnan(__lcpp_x); }
+
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_PREFERRED_OVERLOAD
+bool
+isnan(double __lcpp_x) _NOEXCEPT { return __libcpp_isnan(__lcpp_x); }
+
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+isnan(long double __lcpp_x) _NOEXCEPT { return __libcpp_isnan(__lcpp_x); }
+#endif
+
 #endif  // isnan
 
 // isnormal
@@ -520,7 +548,7 @@ isnan(_A1) _NOEXCEPT
 #ifdef isnormal
 
 template <class _A1>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isnormal(_A1 __lcpp_x) _NOEXCEPT
 {
@@ -550,7 +578,7 @@ isnormal(_A1 __lcpp_x) _NOEXCEPT
 #ifdef isgreater
 
 template <class _A1, class _A2>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 {
@@ -580,7 +608,7 @@ isgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 #ifdef isgreaterequal
 
 template <class _A1, class _A2>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isgreaterequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 {
@@ -610,7 +638,7 @@ isgreaterequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 #ifdef isless
 
 template <class _A1, class _A2>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isless(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 {
@@ -640,7 +668,7 @@ isless(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 #ifdef islessequal
 
 template <class _A1, class _A2>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_islessequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 {
@@ -670,7 +698,7 @@ islessequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 #ifdef islessgreater
 
 template <class _A1, class _A2>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_islessgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 {
@@ -700,7 +728,7 @@ islessgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 #ifdef isunordered
 
 template <class _A1, class _A2>
-_LIBCPP_ALWAYS_INLINE
+_LIBCPP_INLINE_VISIBILITY
 bool
 __libcpp_isunordered(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 {
@@ -1486,4 +1514,18 @@ trunc(_A1 __lcpp_x) _NOEXCEPT {return ::trunc((double)__lcpp_x);}
 
 #endif // __cplusplus
 
+#else // _LIBCPP_MATH_H
+
+// This include lives outside the header guard in order to support an MSVC
+// extension which allows users to do:
+//
+// #define _USE_MATH_DEFINES
+// #include <math.h>
+//
+// and receive the definitions of mathematical constants, even if <math.h>
+// has previously been included.
+#if defined(_LIBCPP_MSVCRT) && defined(_USE_MATH_DEFINES)
+#include_next <math.h>
+#endif
+
 #endif  // _LIBCPP_MATH_H