This patch series optimizes is_member_pointer trait performance. The first patch implements __is_member_pointer built-in trait. The second patch optimizes is_member_pointer trait performance by using __is_member_pointer built-in trait if available.
The performance improvement is shown in the following benchmark: https://github.com/ken-matsui/gsoc23/blob/main/is_member_pointer_v.md#mon-sep-11-092927-pm-pdt-2023 Time: -47.2037% +/- 2.12936% Peak Memory Usage: -39.4183% +/- 0.00217276% Total Memory Usage: -41.9905% +/- 0% Ken Matsui (2): c++: Implement __is_member_pointer built-in trait libstdc++: Optimize is_member_pointer trait performance 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_member_pointer.C | 30 ++++++++++++++++++++ libstdc++-v3/include/std/type_traits | 16 ++++++++++- 6 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/ext/is_member_pointer.C -- 2.42.0
