Hi, This patch series implements __is_const, __is_volatile, __is_pointer, and __is_unbounded_array built-in traits, which were isolated from my previous patch series "Optimize type traits compilation performance" because they contained performance regression. I confirmed that this patch series does not cause any performance regression. The main reason of the performance regression were the exhaustiveness of the benchmarks and the instability of the benchmark results. Also, this patch series includes built-ins for add_pointer, remove_extent, remove_all_extents, add_lvalue_reference, add_rvalue_reference, decay, rank, is_invocable, and is_nothrow_invocable. Here are the benchmark results:
is_const: https://github.com/ken-matsui/gcc-bench/blob/main/is_const.md#sat-dec-23-090605-am-pst-2023 time: -4.36603%, peak memory: -0.300891%, total memory: -0.247934% is_const_v: https://github.com/ken-matsui/gcc-bench/blob/main/is_const_v.md#sat-jun-24-044815-am-pdt-2023 time: -2.86467%, peak memory: -1.0654%, total memory: -1.62369% is_volatile: https://github.com/ken-matsui/gcc-bench/blob/main/is_volatile.md#sun-oct-22-091644-pm-pdt-2023 time: -5.25164%, peak memory: -0.337971%, total memory: -0.247934% is_volatile_v: https://github.com/ken-matsui/gcc-bench/blob/main/is_volatile_v.md#sat-dec-23-091518-am-pst-2023 time: -4.06816%, peak memory: -0.609298%, total memory: -0.659134% is_pointer: https://github.com/ken-matsui/gcc-bench/blob/main/is_pointer.md#sat-dec-23-124903-pm-pst-2023 time: -2.47124%, peak memory: -2.98207%, total memory: -4.0811% is_pointer_v: https://github.com/ken-matsui/gcc-bench/blob/main/is_pointer_v.md#sun-oct-22-122257-am-pdt-2023 time: -4.71336%, peak memory: -2.25026%, total memory: -3.125% is_unbounded_array: https://github.com/ken-matsui/gcc-bench/blob/main/is_unbounded_array.md#sun-oct-22-091644-pm-pdt-2023 time: -6.33287%, peak memory: -0.602494%, total memory: -1.56035% is_unbounded_array_v: https://github.com/ken-matsui/gcc-bench/blob/main/is_unbounded_array_v.md#sat-dec-23-010046-pm-pst-2023 time: -1.50025%, peak memory: -1.07386%, total memory: -2.32394% add_pointer_t: https://github.com/ken-matsui/gcc-bench/blob/main/add_pointer_t.md#wed-feb-28-060044-am-pst-2024 time: -21.6673%, peak memory: -14.6666%, total memory: -17.4716% remove_extent_t: https://github.com/ken-matsui/gcc-bench/blob/main/remove_extent_t.md#wed-feb-28-063021-am-pst-2024 time: -14.4089%, peak memory: -2.71836%, total memory: -9.87013% remove_all_extents_t: https://github.com/ken-matsui/gcc-bench/blob/main/remove_all_extents_t.md#wed-feb-28-064716-am-pst-2024 time: -28.8941%, peak memory: -16.6981%, total memory: -23.6088% add_lvalue_reference_t: https://github.com/ken-matsui/gcc-bench/blob/main/add_lvalue_reference_t.md#wed-feb-28-070023-am-pst-2024 time: -33.8827%, peak memory: -24.9292%, total memory: -25.3043% add_rvalue_reference_t: https://github.com/ken-matsui/gcc-bench/blob/main/add_rvalue_reference_t.md#wed-feb-28-070701-am-pst-2024 time: -23.9186%, peak memory: -17.1311%, total memory: -19.5891% decay_t: https://github.com/ken-matsui/gcc-bench/blob/main/decay_t.md#wed-feb-28-072330-am-pst-2024 time: -42.4076%, peak memory: -29.2077%, total memory: -33.0914% rank: https://github.com/ken-matsui/gcc-bench/blob/main/rank.md#wed-feb-28-074917-am-pst-2024 time: -33.7312%, peak memory: -27.5885%, total memory: -34.5736% rank_v: https://github.com/ken-matsui/gcc-bench/blob/main/rank_v.md#wed-feb-28-073632-am-pst-2024 time: -40.7174%, peak memory: -16.4653%, total memory: -23.0131% is_invocable_v: https://github.com/ken-matsui/gcc-bench/blob/main/is_invocable.md#wed-feb-28-111001-am-pst-2024 time: -58.8307%, peak memory: -59.4966%, total memory: -59.8871% (This benchmark is not exhaustive as my laptop crashed with larger benchmarks) is_nothrow_invocable_v: https://github.com/ken-matsui/gcc-bench/blob/main/is_nothrow_invocable.md#wed-feb-28-112414-am-pst-2024 time: -70.4102%, peak memory: -62.5516%, total memory: -65.5853% (This benchmark is not exhaustive as my laptop crashed with larger benchmarks) Sincerely, Ken Matsui Ken Matsui (26): c++: Implement __is_const built-in trait libstdc++: Optimize std::is_const compilation performance c++: Implement __is_volatile built-in trait libstdc++: Optimize std::is_volatile compilation performance c++: Implement __is_pointer built-in trait libstdc++: Optimize std::is_pointer compilation performance c++: Implement __is_unbounded_array built-in trait libstdc++: Optimize std::is_unbounded_array compilation performance c++: Implement __add_pointer built-in trait libstdc++: Optimize std::add_pointer compilation performance c++: Implement __remove_extent built-in trait libstdc++: Optimize std::remove_extent compilation performance c++: Implement __remove_all_extents built-in trait libstdc++: Optimize std::remove_all_extents compilation performance c++: Implement __add_lvalue_reference built-in trait libstdc++: Optimize std::add_lvalue_reference compilation performance c++: Implement __add_rvalue_reference built-in trait libstdc++: Optimize std::add_rvalue_reference compilation performance c++: Implement __decay built-in trait libstdc++: Optimize std::decay compilation performance c++: Implement __rank built-in trait libstdc++: Optimize std::rank compilation performance c++: Implement __is_invocable built-in trait libstdc++: Optimize std::is_invocable compilation performance c++: Implement __is_nothrow_invocable built-in trait libstdc++: Optimize std::is_nothrow_invocable compilation performance gcc/cp/constraint.cc | 27 ++ gcc/cp/cp-trait.def | 13 + gcc/cp/cp-tree.h | 2 + gcc/cp/method.cc | 132 +++++++ gcc/cp/semantics.cc | 92 ++++- .../g++.dg/ext/add_lvalue_reference.C | 21 ++ gcc/testsuite/g++.dg/ext/add_pointer.C | 39 ++ .../g++.dg/ext/add_rvalue_reference.C | 20 + gcc/testsuite/g++.dg/ext/decay.C | 22 ++ gcc/testsuite/g++.dg/ext/has-builtin-1.C | 39 ++ gcc/testsuite/g++.dg/ext/is_const.C | 20 + gcc/testsuite/g++.dg/ext/is_invocable1.C | 349 ++++++++++++++++++ gcc/testsuite/g++.dg/ext/is_invocable2.C | 139 +++++++ gcc/testsuite/g++.dg/ext/is_invocable3.C | 51 +++ gcc/testsuite/g++.dg/ext/is_invocable4.C | 33 ++ .../g++.dg/ext/is_nothrow_invocable.C | 62 ++++ gcc/testsuite/g++.dg/ext/is_pointer.C | 51 +++ gcc/testsuite/g++.dg/ext/is_unbounded_array.C | 37 ++ gcc/testsuite/g++.dg/ext/is_volatile.C | 20 + gcc/testsuite/g++.dg/ext/rank.C | 24 ++ gcc/testsuite/g++.dg/ext/remove_all_extents.C | 16 + gcc/testsuite/g++.dg/ext/remove_extent.C | 16 + libstdc++-v3/include/bits/cpp_type_traits.h | 31 +- libstdc++-v3/include/std/type_traits | 142 ++++++- .../is_invocable/incomplete_args_neg.cc | 1 + .../20_util/is_invocable/incomplete_neg.cc | 1 + .../incomplete_args_neg.cc | 1 + .../is_nothrow_invocable/incomplete_neg.cc | 1 + 28 files changed, 1389 insertions(+), 13 deletions(-) create mode 100644 gcc/testsuite/g++.dg/ext/add_lvalue_reference.C create mode 100644 gcc/testsuite/g++.dg/ext/add_pointer.C create mode 100644 gcc/testsuite/g++.dg/ext/add_rvalue_reference.C create mode 100644 gcc/testsuite/g++.dg/ext/decay.C create mode 100644 gcc/testsuite/g++.dg/ext/is_const.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable1.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable2.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable3.C create mode 100644 gcc/testsuite/g++.dg/ext/is_invocable4.C create mode 100644 gcc/testsuite/g++.dg/ext/is_nothrow_invocable.C create mode 100644 gcc/testsuite/g++.dg/ext/is_pointer.C create mode 100644 gcc/testsuite/g++.dg/ext/is_unbounded_array.C create mode 100644 gcc/testsuite/g++.dg/ext/is_volatile.C create mode 100644 gcc/testsuite/g++.dg/ext/rank.C create mode 100644 gcc/testsuite/g++.dg/ext/remove_all_extents.C create mode 100644 gcc/testsuite/g++.dg/ext/remove_extent.C -- 2.44.0
