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https://github.com/capstone-engine/llvm-capstone.git
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4d4c70c91c
This patch is based on the suggestion by @ChuanqiXu on discourse (https://discourse.llvm.org/t/alternatives-to-the-implementation-of-std-modules/71958) Instead of making a module partition per header every header gets an inc file which contains the exports per header. The std module then includes all public headers and these inc files. The one file per header is useful for testing purposes. The CI tests whether the exports of a header's module partition matches the "public" named declarations in the header. With one file per header this can still be done. The patch improves compilation time of files using "import std;" and the size of the std module. A comparision of the compilation speed using a libc++ test build/bin/llvm-lit -a -Dstd=c++23 -Denable_modules=std libcxx/test/std/modules/std.pass.cpp Which boils down to import std; int main(int, char**) { std::println("Hello modular world"); return 0; } and has -ftime-report enabled Before ===-------------------------------------------------------------------------=== Clang front-end time report ===-------------------------------------------------------------------------=== Total Execution Time: 8.6585 seconds (8.6619 wall clock) ---User Time--- --System Time-- --User+System-- ---Wall Time--- --- Name --- 4.5041 ( 57.2%) 0.4264 ( 54.4%) 4.9305 ( 56.9%) 4.9331 ( 57.0%) Clang front-end timer 3.2037 ( 40.7%) 0.2408 ( 30.7%) 3.4445 ( 39.8%) 3.4452 ( 39.8%) Reading modules 0.1665 ( 2.1%) 0.1170 ( 14.9%) 0.2835 ( 3.3%) 0.2837 ( 3.3%) Loading .../build/test/__config_module__/CMakeFiles/std.dir/std.pcm 7.8744 (100.0%) 0.7842 (100.0%) 8.6585 (100.0%) 8.6619 (100.0%) Total After ===-------------------------------------------------------------------------=== Clang front-end time report ===-------------------------------------------------------------------------=== Total Execution Time: 1.2420 seconds (1.2423 wall clock) ---User Time--- --System Time-- --User+System-- ---Wall Time--- --- Name --- 0.8892 ( 84.6%) 0.1698 ( 88.8%) 1.0590 ( 85.3%) 1.0590 ( 85.2%) Clang front-end timer 0.1533 ( 14.6%) 0.0168 ( 8.8%) 0.1701 ( 13.7%) 0.1704 ( 13.7%) Reading modules 0.0082 ( 0.8%) 0.0047 ( 2.5%) 0.0129 ( 1.0%) 0.0129 ( 1.0%) Loading .../build/test/__config_module__/CMakeFiles/std.dir/std.pcm 1.0507 (100.0%) 0.1913 (100.0%) 1.2420 (100.0%) 1.2423 (100.0%) Total Using "include <print>" instead of "import module;" ===-------------------------------------------------------------------------=== Clang front-end time report ===-------------------------------------------------------------------------=== Total Execution Time: 2.1507 seconds (2.1517 wall clock) ---User Time--- --System Time-- --User+System-- ---Wall Time--- --- Name --- 1.9714 (100.0%) 0.1793 (100.0%) 2.1507 (100.0%) 2.1517 (100.0%) Clang front-end timer 1.9714 (100.0%) 0.1793 (100.0%) 2.1507 (100.0%) 2.1517 (100.0%) Total It's possible to use the std module in external projects (https://libcxx.llvm.org/Modules.html#using-in-external-projects) Tested this with a private project to validate the size of the generated files: Before $ du -sch std-* 448M std-build 508K std-src 120K std-subbuild 449M total After $ du -sch std-* 29M std-build 1004K std-src 132K std-subbuild 30M total Reviewed By: ldionne, #libc Differential Revision: https://reviews.llvm.org/D156907
97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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export namespace std {
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// [concepts.lang], language-related concepts
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// [concept.same], concept same_as
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using std::same_as;
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// [concept.derived], concept derived_from
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using std::derived_from;
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// [concept.convertible], concept convertible_to
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using std::convertible_to;
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// [concept.commonref], concept common_reference_with
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using std::common_reference_with;
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// [concept.common], concept common_with
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using std::common_with;
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// [concepts.arithmetic], arithmetic concepts
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using std::floating_point;
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using std::integral;
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using std::signed_integral;
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using std::unsigned_integral;
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// [concept.assignable], concept assignable_from
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using std::assignable_from;
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// [concept.swappable], concept swappable
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namespace ranges {
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inline namespace __cpo {
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using std::ranges::__cpo::swap;
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}
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} // namespace ranges
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using std::swappable;
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using std::swappable_with;
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// [concept.destructible], concept destructible
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using std::destructible;
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// [concept.constructible], concept constructible_from
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using std::constructible_from;
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// [concept.default.init], concept default_initializable
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using std::default_initializable;
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// [concept.moveconstructible], concept move_constructible
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using std::move_constructible;
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// [concept.copyconstructible], concept copy_constructible
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using std::copy_constructible;
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// [concepts.compare], comparison concepts
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// [concept.equalitycomparable], concept equality_comparable
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using std::equality_comparable;
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using std::equality_comparable_with;
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// [concept.totallyordered], concept totally_ordered
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using std::totally_ordered;
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using std::totally_ordered_with;
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// [concepts.object], object concepts
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using std::copyable;
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using std::movable;
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using std::regular;
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using std::semiregular;
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// [concepts.callable], callable concepts
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// [concept.invocable], concept invocable
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using std::invocable;
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// [concept.regularinvocable], concept regular_invocable
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using std::regular_invocable;
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// [concept.predicate], concept predicate
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using std::predicate;
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// [concept.relation], concept relation
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using std::relation;
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// [concept.equiv], concept equivalence_relation
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using std::equivalence_relation;
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// [concept.strictweakorder], concept strict_weak_order
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using std::strict_weak_order;
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} // namespace std
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