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[CCCL] 瘦身 + 补全: 移除 cudax/python/libcudacxx-tests 冗余文件, 新增 c2h 测试助手 + cmake 构建系统 + 8 个 CUDA thrust examples

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变更摘要:
- 删除: cudax/ (783 files, 7.2M) — 实验性组件，竞赛不需要
- 删除: python/ (226 files, 2.0M) — Python 绑定，竞赛不需要
- 删除: libcudacxx/{test,benchmarks,codegen,cmake,share} (4432 files, 31M)
  保留: libcudacxx/include/ (1463 headers, cuda::std 编译依赖)
- 新增: c2h/ (27 files) — CUB Catch2 测试辅助头文件，编译 243 个测试必需
- 新增: cmake/ (29 files) — CCCL 原生 CMake 构建系统
- 新增: thrust/examples/cuda/ (7 files) + cpp_integration/ (1 file)
  async_reduce, custom_temporary_allocation, explicit_cuda_stream,
  global_device_vector, range_view, unwrap_pointer, wrap_pointer, device

结果: cccl_upstream 从 74M→35M (瘦身 53%), 核心内容 100% 保留:
  27/27 tuning headers, 78 benchmarks, 243 tests,
  60 thrust examples, 18 CUB examples, 全部编译头文件
This commit is contained in:
muh-bot
2026-08-03 12:39:26 +00:00
parent a2a5dd8f00
commit 24ef6a91b5
5439 changed files with 0 additions and 719516 deletions
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100
cccl_upstream/cudax/test/multi_gpu/nccl/concepts.cu
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//===----------------------------------------------------------------------===//
//
// Part of CUDA Experimental in CUDA C++ Core Libraries,
// under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#include <cuda/functional> // cuda::maximum, cuda::minimum
#include <cuda/std/cstdint>
#include <cuda/std/functional> // cuda::std::plus, cuda::std::multiplies
#include <cuda/experimental/__nccl/nccl_api.h>
#include <c2h/catch2_test_helper.h>
namespace
{
// A trivially-copyable aggregate with no corresponding NCCL data type.
struct trivial_aggregate
{
int a;
double b;
};
// A non-trivially-copyable type (user-provided copy ctor).
struct non_trivial
{
non_trivial(const non_trivial&) {} // NOLINT(modernize-use-equals-default)
int a;
};
} // namespace
C2H_TEST("nccl type and reduction-op traits", "[multi_gpu][nccl]")
{
namespace nccl = ::cuda::experimental::__nccl;
// --- __has_nccl_type_of -------------------------------------------------------
//
// True only for the fixed set of types __nccl_type_of() recognizes.
STATIC_REQUIRE(nccl::__has_nccl_type_of<::cuda::std::int8_t>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<::cuda::std::uint8_t>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<::cuda::std::int32_t>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<::cuda::std::uint32_t>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<::cuda::std::int64_t>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<::cuda::std::uint64_t>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<float>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<double>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<bool>);
// cv-qualifications are stripped via remove_cvref_t before the lookup.
STATIC_REQUIRE(nccl::__has_nccl_type_of<const float>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<volatile int>);
STATIC_REQUIRE(nccl::__has_nccl_type_of<float&>);
// Unsupported types have no NCCL data type.
STATIC_REQUIRE(!nccl::__has_nccl_type_of<long double>);
STATIC_REQUIRE(!nccl::__has_nccl_type_of<void>);
STATIC_REQUIRE(!nccl::__has_nccl_type_of<int*>);
STATIC_REQUIRE(!nccl::__has_nccl_type_of<trivial_aggregate>);
// --- __nccl_type_of_v ---------------------------------------------------------
STATIC_REQUIRE(nccl::__nccl_type_of_v<bool> == nccl::__ncclChar);
STATIC_REQUIRE(nccl::__nccl_type_of_v<::cuda::std::int8_t> == nccl::__ncclInt8);
STATIC_REQUIRE(nccl::__nccl_type_of_v<::cuda::std::uint8_t> == nccl::__ncclUint8);
STATIC_REQUIRE(nccl::__nccl_type_of_v<::cuda::std::int32_t> == nccl::__ncclInt32);
STATIC_REQUIRE(nccl::__nccl_type_of_v<::cuda::std::uint32_t> == nccl::__ncclUint32);
STATIC_REQUIRE(nccl::__nccl_type_of_v<::cuda::std::int64_t> == nccl::__ncclInt64);
STATIC_REQUIRE(nccl::__nccl_type_of_v<::cuda::std::uint64_t> == nccl::__ncclUint64);
STATIC_REQUIRE(nccl::__nccl_type_of_v<float> == nccl::__ncclFloat);
STATIC_REQUIRE(nccl::__nccl_type_of_v<double> == nccl::__ncclDouble);
// cv-ref qualifiers are removed before mapping.
STATIC_REQUIRE(nccl::__nccl_type_of_v<const double&> == nccl::__ncclDouble);
// --- __nccl_redop_of_v --------------------------------------------------------
STATIC_REQUIRE(nccl::__nccl_redop_of_v<::cuda::std::plus<>> == nccl::__ncclSum);
STATIC_REQUIRE(nccl::__nccl_redop_of_v<::cuda::std::multiplies<>> == nccl::__ncclProd);
STATIC_REQUIRE(nccl::__nccl_redop_of_v<::cuda::maximum<>> == nccl::__ncclMax);
STATIC_REQUIRE(nccl::__nccl_redop_of_v<::cuda::minimum<>> == nccl::__ncclMin);
STATIC_REQUIRE(nccl::__nccl_redop_of_v<const ::cuda::std::plus<int>&> == nccl::__ncclSum);
// --- __has_nccl_redop ---------------------------------------------------------
STATIC_REQUIRE(nccl::__has_nccl_redop_of<::cuda::std::plus<>>);
STATIC_REQUIRE(nccl::__has_nccl_redop_of<::cuda::std::multiplies<>>);
STATIC_REQUIRE(nccl::__has_nccl_redop_of<::cuda::maximum<>>);
STATIC_REQUIRE(nccl::__has_nccl_redop_of<::cuda::minimum<>>);
// Typed specializations are recognized too.
STATIC_REQUIRE(nccl::__has_nccl_redop_of<::cuda::std::plus<int>>);
// cv-ref qualifiers are stripped before the lookup.
STATIC_REQUIRE(nccl::__has_nccl_redop_of<const ::cuda::std::plus<>&>);
// Unsupported functors and non-functor types are rejected.
STATIC_REQUIRE(!nccl::__has_nccl_redop_of<::cuda::std::minus<>>);
STATIC_REQUIRE(!nccl::__has_nccl_redop_of<int>);
}