[libcxx-commits] [libcxx] [libc++] <experimental/simd> Add load constructor for class simd/simd_mask (PR #76610)

[Nikolas Klauser via libcxx-commits]

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@@ -0,0 +1,105 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// [simd.class]
+// template<class U, class Flags> simd(const U* mem, Flags);
+
+#include "../test_utils.h"
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <class T, class SimdAbi, std::size_t array_size>
+struct ElementAlignedLoadCtorHelper {
+  template <class U>
+  void operator()() const {
+    constexpr std::size_t alignas_size = alignof(U);
+    alignas(alignas_size) U buffer[array_size];
+    for (size_t i = 0; i < array_size; ++i)
+      buffer[i] = static_cast<U>(i);
+    ex::simd<T, SimdAbi> origin_simd(buffer, ex::element_aligned_tag());
+    assert_simd_values_equal(origin_simd, buffer);
+  }
+};
+
+template <class T, class SimdAbi, std::size_t array_size>
+struct VectorAlignedLoadCtorHelper {
+  template <class U>
+  void operator()() const {
+    constexpr std::size_t alignas_size = ex::memory_alignment_v<ex::simd<T, SimdAbi>, U>;
+    alignas(alignas_size) U buffer[array_size];
----------------
philnik777 wrote:

```suggestion
    alignas([alignas_size](ex::memory_alignment_v<ex::simd<T, SimdAbi>, U>)) U buffer[array_size];
```
Same for the other ones.

https://github.com/llvm/llvm-project/pull/76610