Hi, Here is the benchmark result for is_pointer:
https://github.com/ken-matsui/gcc-benches/blob/main/is_pointer.md#sun-jul--9-103948-pm-pdt-2023 Time: -62.1344% Peak Memory Usage: -52.4281% Total Memory Usage: -53.5889% Sincerely, Ken Matsui On Sun, Jul 9, 2023 at 10:38 PM Ken Matsui <kmat...@gcc.gnu.org> wrote: > > This patch implements built-in trait for std::is_pointer. > > gcc/cp/ChangeLog: > > * cp-trait.def: Define __is_pointer. > * constraint.cc (diagnose_trait_expr): Handle CPTK_IS_POINTER. > * semantics.cc (trait_expr_value): Likewise. > (finish_trait_expr): Likewise. > > gcc/testsuite/ChangeLog: > > * g++.dg/ext/has-builtin-1.C: Test existence of __is_pointer. > * g++.dg/ext/is_pointer.C: New test. > * g++.dg/tm/pr46567.C (__is_pointer): Rename to ... > (____is_pointer): ... this. > * g++.dg/torture/20070621-1.C: Likewise. > * g++.dg/torture/pr57107.C: Likewise. > > libstdc++-v3/ChangeLog: > > * include/bits/cpp_type_traits.h (__is_pointer): Rename to ... > (____is_pointer): ... this. > * include/bits/deque.tcc: Use ____is_pointer instead. > * include/bits/stl_algobase.h: Likewise. > > Signed-off-by: Ken Matsui <kmat...@gcc.gnu.org> > --- > gcc/cp/constraint.cc | 3 ++ > gcc/cp/cp-trait.def | 1 + > gcc/cp/semantics.cc | 4 ++ > gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 ++ > gcc/testsuite/g++.dg/ext/is_pointer.C | 51 +++++++++++++++++++++ > gcc/testsuite/g++.dg/tm/pr46567.C | 22 ++++----- > gcc/testsuite/g++.dg/torture/20070621-1.C | 4 +- > gcc/testsuite/g++.dg/torture/pr57107.C | 4 +- > libstdc++-v3/include/bits/cpp_type_traits.h | 6 +-- > libstdc++-v3/include/bits/deque.tcc | 6 +-- > libstdc++-v3/include/bits/stl_algobase.h | 6 +-- > 11 files changed, 86 insertions(+), 24 deletions(-) > create mode 100644 gcc/testsuite/g++.dg/ext/is_pointer.C > > diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc > index 8cf0f2d0974..30266204eb5 100644 > --- a/gcc/cp/constraint.cc > +++ b/gcc/cp/constraint.cc > @@ -3751,6 +3751,9 @@ diagnose_trait_expr (tree expr, tree args) > case CPTK_IS_UNION: > inform (loc, " %qT is not a union", t1); > break; > + case CPTK_IS_POINTER: > + inform (loc, " %qT is not a pointer", t1); > + break; > case CPTK_IS_AGGREGATE: > inform (loc, " %qT is not an aggregate", t1); > break; > diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def > index 8b7fece0cc8..b7c263e9a77 100644 > --- a/gcc/cp/cp-trait.def > +++ b/gcc/cp/cp-trait.def > @@ -82,6 +82,7 @@ DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, > "__is_trivially_assignable", 2) > DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", > -1) > DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1) > DEFTRAIT_EXPR (IS_UNION, "__is_union", 1) > +DEFTRAIT_EXPR (IS_POINTER, "__is_pointer", 1) > DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, > "__reference_constructs_from_temporary", 2) > DEFTRAIT_EXPR (REF_CONVERTS_FROM_TEMPORARY, > "__reference_converts_from_temporary", 2) > /* FIXME Added space to avoid direct usage in GCC 13. */ > diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc > index 8fb47fd179e..68f8a4fe85b 100644 > --- a/gcc/cp/semantics.cc > +++ b/gcc/cp/semantics.cc > @@ -12118,6 +12118,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, > tree type2) > case CPTK_IS_UNION: > return type_code1 == UNION_TYPE; > > + case CPTK_IS_POINTER: > + return TYPE_PTR_P (type1); > + > case CPTK_IS_ASSIGNABLE: > return is_xible (MODIFY_EXPR, type1, type2); > > @@ -12296,6 +12299,7 @@ finish_trait_expr (location_t loc, cp_trait_kind > kind, tree type1, tree type2) > case CPTK_IS_ENUM: > case CPTK_IS_UNION: > case CPTK_IS_SAME: > + case CPTK_IS_POINTER: > break; > > case CPTK_IS_LAYOUT_COMPATIBLE: > diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C > b/gcc/testsuite/g++.dg/ext/has-builtin-1.C > index f343e153e56..9dace5cbd48 100644 > --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C > +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C > @@ -146,3 +146,6 @@ > #if !__has_builtin (__remove_cvref) > # error "__has_builtin (__remove_cvref) failed" > #endif > +#if !__has_builtin (__is_pointer) > +# error "__has_builtin (__is_pointer) failed" > +#endif > diff --git a/gcc/testsuite/g++.dg/ext/is_pointer.C > b/gcc/testsuite/g++.dg/ext/is_pointer.C > new file mode 100644 > index 00000000000..d6e39565950 > --- /dev/null > +++ b/gcc/testsuite/g++.dg/ext/is_pointer.C > @@ -0,0 +1,51 @@ > +// { dg-do compile { target c++11 } } > + > +#define SA(X) static_assert((X),#X) > + > +SA(!__is_pointer(int)); > +SA(__is_pointer(int*)); > +SA(__is_pointer(int**)); > + > +SA(__is_pointer(const int*)); > +SA(__is_pointer(const int**)); > +SA(__is_pointer(int* const)); > +SA(__is_pointer(int** const)); > +SA(__is_pointer(int* const* const)); > + > +SA(__is_pointer(volatile int*)); > +SA(__is_pointer(volatile int**)); > +SA(__is_pointer(int* volatile)); > +SA(__is_pointer(int** volatile)); > +SA(__is_pointer(int* volatile* volatile)); > + > +SA(__is_pointer(const volatile int*)); > +SA(__is_pointer(const volatile int**)); > +SA(__is_pointer(const int* volatile)); > +SA(__is_pointer(volatile int* const)); > +SA(__is_pointer(int* const volatile)); > +SA(__is_pointer(const int** volatile)); > +SA(__is_pointer(volatile int** const)); > +SA(__is_pointer(int** const volatile)); > +SA(__is_pointer(int* const* const volatile)); > +SA(__is_pointer(int* volatile* const volatile)); > +SA(__is_pointer(int* const volatile* const volatile)); > + > +SA(!__is_pointer(int&)); > +SA(!__is_pointer(const int&)); > +SA(!__is_pointer(volatile int&)); > +SA(!__is_pointer(const volatile int&)); > + > +SA(!__is_pointer(int&&)); > +SA(!__is_pointer(const int&&)); > +SA(!__is_pointer(volatile int&&)); > +SA(!__is_pointer(const volatile int&&)); > + > +SA(!__is_pointer(int[3])); > +SA(!__is_pointer(const int[3])); > +SA(!__is_pointer(volatile int[3])); > +SA(!__is_pointer(const volatile int[3])); > + > +SA(!__is_pointer(int(int))); > +SA(__is_pointer(int(*const)(int))); > +SA(__is_pointer(int(*volatile)(int))); > +SA(__is_pointer(int(*const volatile)(int))); > diff --git a/gcc/testsuite/g++.dg/tm/pr46567.C > b/gcc/testsuite/g++.dg/tm/pr46567.C > index 6d791484448..0896035390e 100644 > --- a/gcc/testsuite/g++.dg/tm/pr46567.C > +++ b/gcc/testsuite/g++.dg/tm/pr46567.C > @@ -192,13 +192,13 @@ namespace std __attribute__ ((__visibility__ > ("default"))) { > typedef __true_type __type; > }; > template<typename _Tp> > - struct __is_pointer > + struct ____is_pointer > { > enum { __value = 0 }; > typedef __false_type __type; > }; > template<typename _Tp> > - struct __is_pointer<_Tp*> > + struct ____is_pointer<_Tp*> > { > enum { __value = 1 }; > typedef __true_type __type; > @@ -226,7 +226,7 @@ namespace std __attribute__ ((__visibility__ > ("default"))) { > { }; > template<typename _Tp> > struct __is_scalar > - : public __traitor<__is_arithmetic<_Tp>, __is_pointer<_Tp> > > + : public __traitor<__is_arithmetic<_Tp>, ____is_pointer<_Tp> > > { }; > template<typename _Tp> > struct __is_char > @@ -1202,8 +1202,8 @@ namespace std __attribute__ ((__visibility__ > ("default"))) { > typedef typename iterator_traits<_OI>::value_type _ValueTypeO; > typedef typename iterator_traits<_II>::iterator_category _Category; > const bool __simple = (__is_pod(_ValueTypeI) > - && __is_pointer<_II>::__value > - && __is_pointer<_OI>::__value > + && ____is_pointer<_II>::__value > + && ____is_pointer<_OI>::__value > && __are_same<_ValueTypeI, _ValueTypeO>::__value); > return std::__copy_move<_IsMove, __simple, > _Category>::__copy_m(__first, __last, __result); > @@ -1294,8 +1294,8 @@ namespace std __attribute__ ((__visibility__ > ("default"))) { > typedef typename iterator_traits<_BI2>::value_type _ValueType2; > typedef typename iterator_traits<_BI1>::iterator_category _Category; > const bool __simple = (__is_pod(_ValueType1) > - && __is_pointer<_BI1>::__value > - && __is_pointer<_BI2>::__value > + && ____is_pointer<_BI1>::__value > + && ____is_pointer<_BI2>::__value > && __are_same<_ValueType1, _ValueType2>::__value); > return std::__copy_move_backward<_IsMove, __simple, > _Category>::__copy_move_b(__first, > @@ -1426,8 +1426,8 @@ namespace std __attribute__ ((__visibility__ > ("default"))) { > typedef typename iterator_traits<_II1>::value_type _ValueType1; > typedef typename iterator_traits<_II2>::value_type _ValueType2; > const bool __simple = (__is_integer<_ValueType1>::__value > - && __is_pointer<_II1>::__value > - && __is_pointer<_II2>::__value > + && ____is_pointer<_II1>::__value > + && ____is_pointer<_II2>::__value > && __are_same<_ValueType1, _ValueType2>::__value); > return std::__equal<__simple>::equal(__first1, __last1, __first2); > } > @@ -1515,8 +1515,8 @@ namespace std __attribute__ ((__visibility__ > ("default"))) { > (__is_byte<_ValueType1>::__value && __is_byte<_ValueType2>::__value > && !__gnu_cxx::__numeric_traits<_ValueType1>::__is_signed > && !__gnu_cxx::__numeric_traits<_ValueType2>::__is_signed > - && __is_pointer<_II1>::__value > - && __is_pointer<_II2>::__value); > + && ____is_pointer<_II1>::__value > + && ____is_pointer<_II2>::__value); > return std::__lexicographical_compare<__simple>::__lc(__first1, > __last1, > __first2, __last2); > } > diff --git a/gcc/testsuite/g++.dg/torture/20070621-1.C > b/gcc/testsuite/g++.dg/torture/20070621-1.C > index d8a6a76b6b0..9ae96717e4f 100644 > --- a/gcc/testsuite/g++.dg/torture/20070621-1.C > +++ b/gcc/testsuite/g++.dg/torture/20070621-1.C > @@ -18,7 +18,7 @@ namespace std __attribute__ ((__visibility__ ("default"))) { > enum { > __value = 0 }; > }; > - template<typename _Tp> struct __is_pointer { > + template<typename _Tp> struct ____is_pointer { > enum { > __value = 0 }; > }; > @@ -49,7 +49,7 @@ namespace std __attribute__ ((__visibility__ ("default"))) { > template<typename _II1, typename _II2> inline bool > __equal_aux(_II1 __first1, _II1 __last1, _II2 __first2) { > typedef typename iterator_traits<_II1>::value_type _ValueType1; > typedef typename iterator_traits<_II2>::value_type _ValueType2; > - const bool __simple = (__is_integer<_ValueType1>::__value > && __is_pointer<_II1>::__value && > __is_pointer<_II2>::__value && __are_same<_ValueType1, > _ValueType2>::__value); > + const bool __simple = (__is_integer<_ValueType1>::__value > && ____is_pointer<_II1>::__value && > ____is_pointer<_II2>::__value && __are_same<_ValueType1, > _ValueType2>::__value); > return std::__equal<__simple>::equal(__first1, __last1, __first2); > } > template<typename _II1, typename _II2> inline bool equal(_II1 > __first1, _II1 __last1, _II2 __first2) { > diff --git a/gcc/testsuite/g++.dg/torture/pr57107.C > b/gcc/testsuite/g++.dg/torture/pr57107.C > index 4dbd32bd298..1fcf337ee58 100644 > --- a/gcc/testsuite/g++.dg/torture/pr57107.C > +++ b/gcc/testsuite/g++.dg/torture/pr57107.C > @@ -17,7 +17,7 @@ namespace std __attribute__ ((__visibility__ ("default"))) { > enum { > __value = 0 }; > }; > - template<typename _Tp> struct __is_pointer { > + template<typename _Tp> struct ____is_pointer { > enum { > __value = 0 }; > }; > @@ -27,7 +27,7 @@ namespace std __attribute__ ((__visibility__ ("default"))) { > }; > template<typename _Tp> struct __is_arithmetic : public > __traitor<__is_integer<_Tp>, __is_floating<_Tp> > { > }; > - template<typename _Tp> struct __is_scalar : public > __traitor<__is_arithmetic<_Tp>, __is_pointer<_Tp> > { > + template<typename _Tp> struct __is_scalar : public > __traitor<__is_arithmetic<_Tp>, ____is_pointer<_Tp> > { > }; > } > namespace __gnu_cxx __attribute__ ((__visibility__ ("default"))) { > diff --git a/libstdc++-v3/include/bits/cpp_type_traits.h > b/libstdc++-v3/include/bits/cpp_type_traits.h > index 4312f32a4e0..3999898ffa6 100644 > --- a/libstdc++-v3/include/bits/cpp_type_traits.h > +++ b/libstdc++-v3/include/bits/cpp_type_traits.h > @@ -364,14 +364,14 @@ __INT_N(__GLIBCXX_TYPE_INT_N_3) > // Pointer types > // > template<typename _Tp> > - struct __is_pointer > + struct ____is_pointer > { > enum { __value = 0 }; > typedef __false_type __type; > }; > > template<typename _Tp> > - struct __is_pointer<_Tp*> > + struct ____is_pointer<_Tp*> > { > enum { __value = 1 }; > typedef __true_type __type; > @@ -390,7 +390,7 @@ __INT_N(__GLIBCXX_TYPE_INT_N_3) > // > template<typename _Tp> > struct __is_scalar > - : public __traitor<__is_arithmetic<_Tp>, __is_pointer<_Tp> > > + : public __traitor<__is_arithmetic<_Tp>, ____is_pointer<_Tp> > > { }; > > // > diff --git a/libstdc++-v3/include/bits/deque.tcc > b/libstdc++-v3/include/bits/deque.tcc > index a212b8a6940..9f5593fac51 100644 > --- a/libstdc++-v3/include/bits/deque.tcc > +++ b/libstdc++-v3/include/bits/deque.tcc > @@ -1273,7 +1273,7 @@ _GLIBCXX_END_NAMESPACE_CONTAINER > { > const bool __simple = > (__is_memcmp_ordered_with<_Tp1, _Tp2>::__value > - && __is_pointer<_Ptr>::__value > + && ____is_pointer<_Ptr>::__value > #if __cplusplus > 201703L && __cpp_lib_concepts > // For C++20 iterator_traits<volatile T*>::value_type is non-volatile > // so __is_byte<T> could be true, but we can't use memcmp with > @@ -1329,8 +1329,8 @@ _GLIBCXX_END_NAMESPACE_CONTAINER > { > const bool __simple = > (__is_memcmp_ordered_with<_Tp1, _Tp2>::__value > - && __is_pointer<_Ptr1>::__value > - && __is_pointer<_Ptr2>::__value > + && ____is_pointer<_Ptr1>::__value > + && ____is_pointer<_Ptr2>::__value > #if __cplusplus > 201703L && __cpp_lib_concepts > // For C++20 iterator_traits<volatile T*>::value_type is non-volatile > // so __is_byte<T> could be true, but we can't use memcmp with > diff --git a/libstdc++-v3/include/bits/stl_algobase.h > b/libstdc++-v3/include/bits/stl_algobase.h > index dd95e94f7e9..b061c6c1185 100644 > --- a/libstdc++-v3/include/bits/stl_algobase.h > +++ b/libstdc++-v3/include/bits/stl_algobase.h > @@ -1214,7 +1214,7 @@ _GLIBCXX_END_NAMESPACE_CONTAINER > { > typedef typename iterator_traits<_II1>::value_type _ValueType1; > const bool __simple = ((__is_integer<_ValueType1>::__value > - || __is_pointer<_ValueType1>::__value) > + || ____is_pointer<_ValueType1>::__value) > && __memcmpable<_II1, _II2>::__value); > return std::__equal<__simple>::equal(__first1, __last1, __first2); > } > @@ -1377,8 +1377,8 @@ _GLIBCXX_END_NAMESPACE_CONTAINER > typedef typename iterator_traits<_II2>::value_type _ValueType2; > const bool __simple = > (__is_memcmp_ordered_with<_ValueType1, _ValueType2>::__value > - && __is_pointer<_II1>::__value > - && __is_pointer<_II2>::__value > + && ____is_pointer<_II1>::__value > + && ____is_pointer<_II2>::__value > #if __cplusplus > 201703L && __cpp_lib_concepts > // For C++20 iterator_traits<volatile T*>::value_type is non-volatile > // so __is_byte<T> could be true, but we can't use memcmp with > -- > 2.41.0 >
