[libc++] Remove explicit instantiations of __insertion_sort_incomplete and __sort5 from the dylib

[philnik]

Summary

These instantiations were never visible, because they are only used in __sort, which is also explicitly instantiated in the dylib.

[philnik]

Adding #libc_vendors for awareness. In case anybody has a way of checking whether some application is relying on these symbols it would also be nice to have confirmation that there is indeed nobody relying on them.

[ldionne]

LGTM. This is safe in theory, and I can confirm that I didn't find any program relying on these symbols on our platform -- so this seems to be safe in practice too. Also, this is landing early in the LLVM 17 cycle, so we should have plenty of time to discover issues in case there are any (but I really don't expect anything).

libcxx/include/__algorithm/sort.h

 extern template _LIBCPP_FUNC_VIS void __sort<__less<long>&, long*>(long*, long*, __less<long>&);
 extern template _LIBCPP_FUNC_VIS void __sort<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&);
 extern template _LIBCPP_FUNC_VIS void __sort<__less<long long>&, long long*>(long long*, long long*, __less<long long>&);
 extern template _LIBCPP_FUNC_VIS void __sort<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&);
 extern template _LIBCPP_FUNC_VIS void __sort<__less<float>&, float*>(float*, float*, __less<float>&);
 extern template _LIBCPP_FUNC_VIS void __sort<__less<double>&, double*>(double*, double*, __less<double>&);
 extern template _LIBCPP_FUNC_VIS void __sort<__less<long double>&, long double*>(long double*, long double*, __less<long double>&);
 
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<char>&, char*>(char*, char*, __less<char>&);
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&);
-#endif
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<short>&, short*>(short*, short*, __less<short>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<int>&, int*>(int*, int*, __less<int>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long>&, long*>(long*, long*, __less<long>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long long>&, long long*>(long long*, long long*, __less<long long>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<float>&, float*>(float*, float*, __less<float>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<double>&, double*>(double*, double*, __less<double>&);
-extern template _LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long double>&, long double*>(long double*, long double*, __less<long double>&);
-
-extern template _LIBCPP_FUNC_VIS unsigned __sort5<__less<long double>&, long double*>(long double*, long double*, long double*, long double*, long double*, __less<long double>&);
-
 template <class _AlgPolicy, class _RandomAccessIterator, class _Comp>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
 void __sort_impl(_RandomAccessIterator __first, _RandomAccessIterator __last, _Comp& __comp) {
   std::__debug_randomize_range<_AlgPolicy>(__first, __last);
 
   using _Comp_ref = __comp_ref_type<_Comp>;
   if (__libcpp_is_constant_evaluated()) {
     std::__partial_sort<_AlgPolicy>(__first, __last, __last, __comp);

libcxx/lib/abi/CHANGELOG.TXT

 ABI Changelog
 ==============
 This changelog contains information about ABI changes in libc++. Specifically
 the addition and deletion of symbols from the libc++ dylib.
 
 Each entry should start with the revision number followed by a description of
 the change. The entry should contain a summary of the ABI changes made,
 including what symbols were added, removed, or changed.
 
 To generate a summary, re-generate the new ABI list using the
 `generate-cxx-abilist` target, and look at the diff.
 
 New entries should be added directly below the "Version" header.
 
 ------------
+Version 17.0
+------------
+
+* [libc++] Remove explicit instantiations of __insertion_sort_incomplete and __sort5 from the dylib
+
+  These instantiations were never visible, because they are only used in `__sort`, which is also explicitly
+  instantiated in the dylib.
+
+  All platforms
+  -------------
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIaaEEPaEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIccEEPcEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIddEEPdEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIeeEEPeEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIffEEPfEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIhhEEPhEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIiiEEPiEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIjjEEPjEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIllEEPlEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessImmEEPmEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIssEEPsEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIttEEPtEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIwwEEPwEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIxxEEPxEEbT0_S5_T_
+  Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIyyEEPyEEbT0_S5_T_
+  Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIeeEEPeEEjT0_S5_S5_S5_S5_T_
+
+------------
 Version 16.0
 ------------
 
 * [libc++][PMR] Move the pmr::memory_resource destructor into the dylib
 
   All platforms
   -------------
   Symbol added: _ZNSt3__13pmr15memory_resourceD0Ev

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libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist

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 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znam', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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 No newline at end of file

libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist

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 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEC2EOS5_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__122__libcpp_verbose_abortEPKcz', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIaaEEPaEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIeeEEPeEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIffEEPfEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIhhEEPhEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessImmEEPmEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIssEEPsEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIttEEPtEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIwwEEPwEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIxxEEPxEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIyyEEPyEEbT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessIffEEPfEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessImmEEPmEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessIssEEPsEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessIttEEPtEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessIwwEEPwEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessIxxEEPxEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16__sortIRNS_6__lessIyyEEPyEEvT0_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16chrono12steady_clock9is_steadyE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__16chrono12system_clock9is_steadyE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17__sort5IRNS_6__lessIeeEEPeEEjT0_S5_S5_S5_S5_T_', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIcE2idE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIcED0Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIcED1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIcED2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIwE2idE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
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 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIwED1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZNSt3__17collateIwED2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}

 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znam', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnamSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znwm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnwmSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 No newline at end of file

libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist

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 No newline at end of file

libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist

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libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist

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 No newline at end of file

libcxx/src/algorithm.cpp

 template void __sort<__less<long>&, long*>(long*, long*, __less<long>&);
 template void __sort<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&);
 template void __sort<__less<long long>&, long long*>(long long*, long long*, __less<long long>&);
 template void __sort<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&);
 template void __sort<__less<float>&, float*>(float*, float*, __less<float>&);
 template void __sort<__less<double>&, double*>(double*, double*, __less<double>&);
 template void __sort<__less<long double>&, long double*>(long double*, long double*, __less<long double>&);
 
-template bool __insertion_sort_incomplete<__less<char>&, char*>(char*, char*, __less<char>&);
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-template bool __insertion_sort_incomplete<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&);
-#endif
-template bool __insertion_sort_incomplete<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&);
-template bool __insertion_sort_incomplete<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&);
-template bool __insertion_sort_incomplete<__less<short>&, short*>(short*, short*, __less<short>&);
-template bool __insertion_sort_incomplete<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&);
-template bool __insertion_sort_incomplete<__less<int>&, int*>(int*, int*, __less<int>&);
-template bool __insertion_sort_incomplete<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&);
-template bool __insertion_sort_incomplete<__less<long>&, long*>(long*, long*, __less<long>&);
-template bool __insertion_sort_incomplete<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&);
-template bool __insertion_sort_incomplete<__less<long long>&, long long*>(long long*, long long*, __less<long long>&);
-template bool __insertion_sort_incomplete<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&);
-template bool __insertion_sort_incomplete<__less<float>&, float*>(float*, float*, __less<float>&);
-template bool __insertion_sort_incomplete<__less<double>&, double*>(double*, double*, __less<double>&);
-template bool __insertion_sort_incomplete<__less<long double>&, long double*>(long double*, long double*, __less<long double>&);
-
-template unsigned __sort5<__less<long double>&, long double*>(long double*, long double*, long double*, long double*, long double*, __less<long double>&);
-
 _LIBCPP_END_NAMESPACE_STD