From 217bb9d2e8ce4f07a832b51ed630655807815758 Mon Sep 17 00:00:00 2001
From: paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 9 May 2011 15:38:21 +0000
Subject: [PATCH] 2011-05-09  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/48933
	* include/c_global/cmath (acosh, asinh, atanh, cbrt, copysign,
	erf, erfc, exp2, expm1, fdim, fma, fmax, hypot, ilogb, lgamma,
	llrint, llround, log1p, log2, logb, lrint, lround, nearbyint,
	nextafter, nexttoward, remainder, remquo, rint, round, scalbln,
	scalbn, tgamma, trunc): Use __enable_if on the return type.
	* include/tr1/cmath: Likewise.
	* testsuite/26_numerics/headers/cmath/overloads_c++0x_neg.cc: New.
	* testsuite/tr1/8_c_compatibility/cmath/overloads_neg.cc: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@173574 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libstdc++-v3/ChangeLog                             |  12 +
 libstdc++-v3/include/c_global/cmath                | 259 ++++++++++-----------
 libstdc++-v3/include/tr1/cmath                     | 257 ++++++++++----------
 .../headers/cmath/overloads_c++0x_neg.cc           |  65 ++++++
 .../tr1/8_c_compatibility/cmath/overloads_neg.cc   |  66 ++++++
 5 files changed, 389 insertions(+), 270 deletions(-)
 create mode 100644 libstdc++-v3/testsuite/26_numerics/headers/cmath/overloads_c++0x_neg.cc
 create mode 100644 libstdc++-v3/testsuite/tr1/8_c_compatibility/cmath/overloads_neg.cc

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index af2f9b9a410..0ba711832dc 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,15 @@
+2011-05-09  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/48933
+	* include/c_global/cmath (acosh, asinh, atanh, cbrt, copysign,
+	erf, erfc, exp2, expm1, fdim, fma, fmax, hypot, ilogb, lgamma,
+	llrint, llround, log1p, log2, logb, lrint, lround, nearbyint,
+	nextafter, nexttoward, remainder, remquo, rint, round, scalbln,
+	scalbn, tgamma, trunc): Use __enable_if on the return type.
+	* include/tr1/cmath: Likewise.
+	* testsuite/26_numerics/headers/cmath/overloads_c++0x_neg.cc: New.
+	* testsuite/tr1/8_c_compatibility/cmath/overloads_neg.cc: Likewise.
+
 2011-05-07  François Dumont  <francois.cppdevs@free.fr>
 
 	* include/debug/macro.h (_GLIBCXX_DEBUG_VERIFY_AT): New.
diff --git a/libstdc++-v3/include/c_global/cmath b/libstdc++-v3/include/c_global/cmath
index a333eb583c0..e38ab9d6e21 100644
--- a/libstdc++-v3/include/c_global/cmath
+++ b/libstdc++-v3/include/c_global/cmath
@@ -1,7 +1,7 @@
 // -*- C++ -*- C forwarding header.
 
 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
-// 2006, 2007, 2008, 2009, 2010
+// 2006, 2007, 2008, 2009, 2010, 2011
 // Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
@@ -1120,12 +1120,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_acoshl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     acosh(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return acosh(__type(__x));
-    }
+    { return __builtin_acosh(__x); }
 
   inline float
   asinh(float __x)
@@ -1136,12 +1134,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_asinhl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     asinh(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return asinh(__type(__x));
-    }
+    { return __builtin_asinh(__x); }
 
   inline float
   atanh(float __x)
@@ -1152,12 +1148,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_atanhl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     atanh(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return atanh(__type(__x));
-    }
+    { return __builtin_atanh(__x); }
 
   inline float
   cbrt(float __x)
@@ -1168,12 +1162,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_cbrtl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     cbrt(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return cbrt(__type(__x));
-    }
+    { return __builtin_cbrt(__x); }
 
   inline float
   copysign(float __x, float __y)
@@ -1184,7 +1176,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_copysignl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     copysign(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1200,12 +1196,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_erfl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     erf(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return erf(__type(__x));
-    }
+    { return __builtin_erf(__x); }
 
   inline float
   erfc(float __x)
@@ -1216,12 +1210,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_erfcl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     erfc(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return erfc(__type(__x));
-    }
+    { return __builtin_erfc(__x); }
 
   inline float
   exp2(float __x)
@@ -1232,12 +1224,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_exp2l(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     exp2(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return exp2(__type(__x));
-    }
+    { return __builtin_exp2(__x); }
 
   inline float
   expm1(float __x)
@@ -1248,12 +1238,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_expm1l(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     expm1(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return expm1(__type(__x));
-    }
+    { return __builtin_expm1(__x); }
 
   inline float
   fdim(float __x, float __y)
@@ -1264,7 +1252,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fdiml(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     fdim(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1280,7 +1272,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fmal(__x, __y, __z); }
 
   template<typename _Tp, typename _Up, typename _Vp>
-    inline typename __gnu_cxx::__promote_3<_Tp, _Up, _Vp>::__type
+    inline
+    typename __gnu_cxx::__promote_3<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value
+				    && __is_arithmetic<_Vp>::__value,
+				    _Tp>::__type, _Up, _Vp>::__type
     fma(_Tp __x, _Up __y, _Vp __z)
     {
       typedef typename __gnu_cxx::__promote_3<_Tp, _Up, _Vp>::__type __type;
@@ -1296,7 +1293,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fmaxl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     fmax(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1312,7 +1313,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fminl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     fmin(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1328,8 +1333,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_hypotl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
-    hypot(_Tp __x, _Up __y)
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
+     hypot(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
       return hypot(__type(__x), __type(__y));
@@ -1344,12 +1353,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_ilogbl(__x); }
 
   template<typename _Tp>
-    inline int
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   int>::__type
     ilogb(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return ilogb(__type(__x));
-    }
+    { return __builtin_ilogb(__x); }
 
   inline float
   lgamma(float __x)
@@ -1360,12 +1367,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_lgammal(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     lgamma(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return lgamma(__type(__x));
-    }
+    { return __builtin_lgamma(__x); }
 
   inline long long
   llrint(float __x)
@@ -1376,12 +1381,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_llrintl(__x); }
 
   template<typename _Tp>
-    inline long long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long long>::__type
     llrint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return llrint(__type(__x));
-    }
+    { return __builtin_llrint(__x); }
 
   inline long long
   llround(float __x)
@@ -1392,12 +1395,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_llroundl(__x); }
 
   template<typename _Tp>
-    inline long long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+                                           long long>::__type
     llround(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return llround(__type(__x));
-    }
+    { return __builtin_llround(__x); }
 
   inline float
   log1p(float __x)
@@ -1408,12 +1409,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_log1pl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     log1p(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return log1p(__type(__x));
-    }
+    { return __builtin_log1p(__x); }
 
   // DR 568.
   inline float
@@ -1425,12 +1424,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_log2l(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     log2(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return log2(__type(__x));
-    }
+    { return __builtin_log2(__x); }
 
   inline float
   logb(float __x)
@@ -1441,12 +1438,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_logbl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     logb(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return logb(__type(__x));
-    }
+    { return __builtin_logb(__x); }
 
   inline long
   lrint(float __x)
@@ -1457,12 +1452,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_lrintl(__x); }
 
   template<typename _Tp>
-    inline long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long>::__type
     lrint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return lrint(__type(__x));
-    }
+    { return __builtin_lrint(__x); }
 
   inline long
   lround(float __x)
@@ -1473,12 +1466,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_lroundl(__x); }
 
   template<typename _Tp>
-    inline long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long>::__type
     lround(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return lround(__type(__x));
-    }
+    { return __builtin_lround(__x); }
 
   inline float
   nearbyint(float __x)
@@ -1489,12 +1480,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_nearbyintl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     nearbyint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return nearbyint(__type(__x));
-    }
+    { return __builtin_nearbyint(__x); }
 
   inline float
   nextafter(float __x, float __y)
@@ -1505,7 +1494,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_nextafterl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     nextafter(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1521,12 +1514,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_nexttowardl(__x, __y); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     nexttoward(_Tp __x, long double __y)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return nexttoward(__type(__x), __y);
-    }
+    { return __builtin_nexttoward(__x, __y); }
 
   inline float
   remainder(float __x, float __y)
@@ -1537,7 +1528,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_remainderl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     remainder(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1553,7 +1548,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_remquol(__x, __y, __pquo); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     remquo(_Tp __x, _Up __y, int* __pquo)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -1569,12 +1568,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_rintl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     rint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return rint(__type(__x));
-    }
+    { return __builtin_rint(__x); }
 
   inline float
   round(float __x)
@@ -1585,12 +1582,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_roundl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     round(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return round(__type(__x));
-    }
+    { return __builtin_round(__x); }
 
   inline float
   scalbln(float __x, long __ex)
@@ -1601,12 +1596,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_scalblnl(__x, __ex); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     scalbln(_Tp __x, long __ex)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return scalbln(__type(__x), __ex);
-    }
+    { return __builtin_scalbln(__x, __ex); }
  
   inline float
   scalbn(float __x, int __ex)
@@ -1617,12 +1610,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_scalbnl(__x, __ex); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     scalbn(_Tp __x, int __ex)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return scalbn(__type(__x), __ex);
-    }
+    { return __builtin_scalbn(__x, __ex); }
 
   inline float
   tgamma(float __x)
@@ -1633,12 +1624,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_tgammal(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     tgamma(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return tgamma(__type(__x));
-    }
+    { return __builtin_tgamma(__x); }
  
   inline float
   trunc(float __x)
@@ -1649,12 +1638,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_truncl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     trunc(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return trunc(__type(__x));
-    }
+    { return __builtin_trunc(__x); }
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/tr1/cmath b/libstdc++-v3/include/tr1/cmath
index 21bdee88654..9ada6379a77 100644
--- a/libstdc++-v3/include/tr1/cmath
+++ b/libstdc++-v3/include/tr1/cmath
@@ -429,12 +429,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_acoshl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     acosh(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return acosh(__type(__x));
-    }
+    { return __builtin_acosh(__x); }
 
   using std::asin;
 
@@ -447,12 +445,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_asinhl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     asinh(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return asinh(__type(__x));
-    }
+    { return __builtin_asinh(__x); }
 
   using std::atan;
   using std::atan2;
@@ -466,12 +462,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_atanhl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     atanh(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return atanh(__type(__x));
-    }
+    { return __builtin_atanh(__x); }
 
   inline float
   cbrt(float __x)
@@ -482,12 +476,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_cbrtl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     cbrt(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return cbrt(__type(__x));
-    }
+    { return __builtin_cbrt(__x); }
 
   using std::ceil;
 
@@ -500,7 +492,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_copysignl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     copysign(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -519,12 +515,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_erfl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     erf(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return erf(__type(__x));
-    }
+    { return __builtin_erf(__x); }
 
   inline float
   erfc(float __x)
@@ -535,12 +529,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_erfcl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     erfc(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return erfc(__type(__x));
-    }
+    { return __builtin_erfc(__x); }
 
   using std::exp;
 
@@ -553,12 +545,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_exp2l(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     exp2(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return exp2(__type(__x));
-    }
+    { return __builtin_exp2(__x); }
 
   inline float
   expm1(float __x)
@@ -569,12 +559,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_expm1l(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     expm1(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return expm1(__type(__x));
-    }
+    { return __builtin_expm1(__x); }
 
   // Note: we deal with fabs in a special way, because an using std::fabs
   // would bring in also the overloads for complex types, which in C++0x
@@ -604,7 +592,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fdiml(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     fdim(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -622,7 +614,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fmal(__x, __y, __z); }
 
   template<typename _Tp, typename _Up, typename _Vp>
-    inline typename __gnu_cxx::__promote_3<_Tp, _Up, _Vp>::__type
+    inline
+    typename __gnu_cxx::__promote_3<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value
+				    && __is_arithmetic<_Vp>::__value,
+				    _Tp>::__type, _Up, _Vp>::__type
     fma(_Tp __x, _Up __y, _Vp __z)
     {
       typedef typename __gnu_cxx::__promote_3<_Tp, _Up, _Vp>::__type __type;
@@ -638,7 +635,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fmaxl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     fmax(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -654,7 +655,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_fminl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     fmin(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -673,11 +678,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_hypotl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
-    hypot(_Tp __x, _Up __y)
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
+    hypot(_Tp __y, _Up __x)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
-      return hypot(__type(__x), __type(__y));
+      return hypot(__type(__y), __type(__x));
     }
 
   inline int
@@ -689,12 +698,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_ilogbl(__x); }
 
   template<typename _Tp>
-    inline int
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   int>::__type
     ilogb(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return ilogb(__type(__x));
-    }
+    { return __builtin_ilogb(__x); }
 
   using std::ldexp;
 
@@ -707,12 +714,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_lgammal(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     lgamma(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return lgamma(__type(__x));
-    }
+    { return __builtin_lgamma(__x); }
 
   inline long long
   llrint(float __x)
@@ -723,12 +728,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_llrintl(__x); }
 
   template<typename _Tp>
-    inline long long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long long>::__type
     llrint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return llrint(__type(__x));
-    }
+    { return __builtin_llrint(__x); }
 
   inline long long
   llround(float __x)
@@ -739,12 +742,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_llroundl(__x); }
 
   template<typename _Tp>
-    inline long long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long long>::__type
     llround(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return llround(__type(__x));
-    }
+    { return __builtin_llround(__x); }
 
   using std::log;
   using std::log10;
@@ -758,12 +759,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_log1pl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     log1p(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return log1p(__type(__x));
-    }
+    { return __builtin_log1p(__x); }
 
   // DR 568.
   inline float
@@ -775,12 +774,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_log2l(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     log2(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return log2(__type(__x));
-    }
+    { return __builtin_log2(__x); }
 
   inline float
   logb(float __x)
@@ -791,11 +788,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_logbl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     logb(_Tp __x)
     {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return logb(__type(__x));
+      return __builtin_logb(__x);
     }
 
   inline long
@@ -807,12 +804,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_lrintl(__x); }
 
   template<typename _Tp>
-    inline long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long>::__type
     lrint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return lrint(__type(__x));
-    }
+    { return __builtin_lrint(__x); }
 
   inline long
   lround(float __x)
@@ -823,12 +818,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_lroundl(__x); }
 
   template<typename _Tp>
-    inline long
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   long>::__type
     lround(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return lround(__type(__x));
-    }
+    { return __builtin_lround(__x); }
 
   inline float
   nearbyint(float __x)
@@ -839,12 +832,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_nearbyintl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     nearbyint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return nearbyint(__type(__x));
-    }
+    { return __builtin_nearbyint(__x); }
 
   inline float
   nextafter(float __x, float __y)
@@ -855,7 +846,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_nextafterl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     nextafter(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -871,12 +866,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_nexttowardl(__x, __y); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     nexttoward(_Tp __x, long double __y)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return nexttoward(__type(__x), __y);
-    }
+    { return __builtin_nexttoward(__x, __y); }
 
   // DR 550. What should the return type of pow(float,int) be?
   // NB: C++0x and TR1 != C++03.
@@ -891,7 +884,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_remainderl(__x, __y); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     remainder(_Tp __x, _Up __y)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -907,7 +904,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_remquol(__x, __y, __pquo); }
 
   template<typename _Tp, typename _Up>
-    inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
+    inline
+    typename __gnu_cxx::__promote_2<
+    typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value
+				    && __is_arithmetic<_Up>::__value,
+				    _Tp>::__type, _Up>::__type
     remquo(_Tp __x, _Up __y, int* __pquo)
     {
       typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
@@ -923,12 +924,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_rintl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     rint(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return rint(__type(__x));
-    }
+    { return __builtin_rint(__x); }
 
   inline float
   round(float __x)
@@ -939,12 +938,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_roundl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     round(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return round(__type(__x));
-    }
+    { return __builtin_round(__x); }
 
   inline float
   scalbln(float __x, long __ex)
@@ -955,12 +952,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_scalblnl(__x, __ex); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     scalbln(_Tp __x, long __ex)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return scalbln(__type(__x), __ex);
-    }
+    { return __builtin_scalbln(__x, __ex); }
  
   inline float
   scalbn(float __x, int __ex)
@@ -971,12 +966,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_scalbnl(__x, __ex); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     scalbn(_Tp __x, int __ex)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return scalbn(__type(__x), __ex);
-    }
+    { return __builtin_scalbn(__x, __ex); }
 
   using std::sin;
   using std::sinh;
@@ -993,12 +986,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_tgammal(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     tgamma(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return tgamma(__type(__x));
-    }
+    { return __builtin_tgamma(__x); }
  
   inline float
   trunc(float __x)
@@ -1009,12 +1000,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   { return __builtin_truncl(__x); }
 
   template<typename _Tp>
-    inline typename __gnu_cxx::__promote<_Tp>::__type 
+    inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value, 
+					   double>::__type
     trunc(_Tp __x)
-    {
-      typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-      return trunc(__type(__x));
-    }
+    { return __builtin_trunc(__x); }
 
 #endif
 _GLIBCXX_END_NAMESPACE_VERSION
diff --git a/libstdc++-v3/testsuite/26_numerics/headers/cmath/overloads_c++0x_neg.cc b/libstdc++-v3/testsuite/26_numerics/headers/cmath/overloads_c++0x_neg.cc
new file mode 100644
index 00000000000..2d8862ead15
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/headers/cmath/overloads_c++0x_neg.cc
@@ -0,0 +1,65 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2011 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <cmath>
+
+// libstdc++/48933
+
+#ifdef _GLIBCXX_USE_C99_MATH_TR1
+
+struct Foo { };
+
+template Foo std::atan2<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::acosh<Foo>(Foo); // { dg-error "not match" }
+template Foo std::asinh<Foo>(Foo); // { dg-error "not match" }
+template Foo std::atanh<Foo>(Foo); // { dg-error "not match" }
+template Foo std::cbrt<Foo>(Foo); // { dg-error "not match" }
+template Foo std::copysign<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::erf<Foo>(Foo); // { dg-error "not match" }
+template Foo std::erfc<Foo>(Foo); // { dg-error "not match" }
+template Foo std::exp2<Foo>(Foo); // { dg-error "not match" }
+template Foo std::expm1<Foo>(Foo); // { dg-error "not match" }
+template Foo std::fdim<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::fma<Foo, Foo, Foo>(Foo(), Foo(), Foo()); // { dg-error "not match" }
+template Foo std::fmax<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::fmin<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::hypot<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template int std::ilogb<Foo>(Foo); // { dg-error "not match" }
+template Foo std::lgamma<Foo>(Foo); // { dg-error "not match" }
+template long long std::llrint<Foo>(Foo); // { dg-error "not match" }
+template long long std::llround<Foo>(Foo); // { dg-error "not match" }
+template Foo std::log1p<Foo>(Foo); // { dg-error "not match" }
+template Foo std::log2<Foo>(Foo); // { dg-error "not match" }
+template Foo std::logb<Foo>(Foo); // { dg-error "not match" }
+template long std::lrint<Foo>(Foo); // { dg-error "not match" }
+template long std::lround<Foo>(Foo); // { dg-error "not match" }
+template Foo std::nearbyint<Foo>(Foo); // { dg-error "not match" }
+template Foo std::nextafter<Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::nexttoward<Foo>(Foo, long double); // { dg-error "not match" }
+template Foo std::remainder<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::remquo<Foo>(Foo, Foo, int*); // { dg-error "not match" }
+template Foo std::rint<Foo>(Foo); // { dg-error "not match" }
+template Foo std::round<Foo>(Foo); // { dg-error "not match" }
+template Foo std::scalbln<Foo>(Foo, long); // { dg-error "not match" }
+template Foo std::scalbn<Foo>(Foo, int); // { dg-error "not match" }
+template Foo std::tgamma<Foo>(Foo); // { dg-error "not match" }
+template Foo std::trunc<Foo>(Foo); // { dg-error "not match" }
+
+#endif
diff --git a/libstdc++-v3/testsuite/tr1/8_c_compatibility/cmath/overloads_neg.cc b/libstdc++-v3/testsuite/tr1/8_c_compatibility/cmath/overloads_neg.cc
new file mode 100644
index 00000000000..174a81dc5f9
--- /dev/null
+++ b/libstdc++-v3/testsuite/tr1/8_c_compatibility/cmath/overloads_neg.cc
@@ -0,0 +1,66 @@
+// { dg-do compile }
+
+// Copyright (C) 2011 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// 8.16.4 Additional overloads
+
+#include <tr1/cmath>
+
+// libstdc++/48933
+
+#ifdef _GLIBCXX_USE_C99_MATH_TR1
+
+struct Foo { };
+
+template Foo std::tr1::atan2<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::acosh<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::asinh<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::atanh<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::cbrt<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::copysign<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::erf<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::erfc<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::exp2<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::expm1<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::fdim<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::fma<Foo, Foo, Foo>(Foo(), Foo(), Foo()); // { dg-error "not match" }
+template Foo std::tr1::fmax<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::fmin<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::hypot<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template int std::tr1::ilogb<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::lgamma<Foo>(Foo); // { dg-error "not match" }
+template long long std::tr1::llrint<Foo>(Foo); // { dg-error "not match" }
+template long long std::tr1::llround<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::log1p<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::log2<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::logb<Foo>(Foo); // { dg-error "not match" }
+template long std::tr1::lrint<Foo>(Foo); // { dg-error "not match" }
+template long std::tr1::lround<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::nearbyint<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::nextafter<Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::nexttoward<Foo>(Foo, long double); // { dg-error "not match" }
+template Foo std::tr1::remainder<Foo, Foo>(Foo, Foo); // { dg-error "not match" }
+template Foo std::tr1::remquo<Foo>(Foo, Foo, int*); // { dg-error "not match" }
+template Foo std::tr1::rint<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::round<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::scalbln<Foo>(Foo, long); // { dg-error "not match" }
+template Foo std::tr1::scalbn<Foo>(Foo, int); // { dg-error "not match" }
+template Foo std::tr1::tgamma<Foo>(Foo); // { dg-error "not match" }
+template Foo std::tr1::trunc<Foo>(Foo); // { dg-error "not match" }
+
+#endif
-- 
2.11.0