[PATCH v16 00/26] Optimize more type traits

[Ken Matsui <kmatsui@gcc.gnu.org>]

Changes from v15:

* Rebased on top of trunk
* Fixed build_invoke
* Implemented object_type_p & referenceable_type_p
* Prefixed all built-in traits with __builtin instead of __

--

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)

Ken Matsui (26):
  c++: Implement __builtin_is_const trait
  libstdc++: Optimize std::is_const compilation performance
  c++: Implement __builtin_is_volatile trait
  libstdc++: Optimize std::is_volatile compilation performance
  c++: Implement __builtin_is_pointer trait
  libstdc++: Optimize std::is_pointer compilation performance
  c++: Implement __builtin_is_unbounded_array trait
  libstdc++: Optimize std::is_unbounded_array compilation performance
  c++: Implement __builtin_add_pointer trait
  libstdc++: Optimize std::add_pointer compilation performance
  c++: Implement __builtin_remove_extent trait
  libstdc++: Optimize std::remove_extent compilation performance
  c++: Implement __builtin_remove_all_extents trait
  libstdc++: Optimize std::remove_all_extents compilation performance
  c++: Implement __builtin_add_lvalue_reference trait
  libstdc++: Optimize std::add_lvalue_reference compilation performance
  c++: Implement __builtin_add_rvalue_reference trait
  libstdc++: Optimize std::add_rvalue_reference compilation performance
  c++: Implement __builtin_decay trait
  libstdc++: Optimize std::decay compilation performance
  c++: Implement __builtin_rank trait
  libstdc++: Optimize std::rank compilation performance
  c++: Implement __builtin_is_invocable trait
  libstdc++: Optimize std::is_invocable compilation performance
  c++: Implement __builtin_is_nothrow_invocable 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                              | 134 +++++++
 gcc/cp/semantics.cc                           | 118 +++++-
 .../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          | 143 ++++++-
 .../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, 1415 insertions(+), 16 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