From 93d58f71134cb97e79c417e540d12940960b529e Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar@redhat.com>
Date: Fri, 16 Nov 2018 00:47:24 +0000
Subject: [PATCH] Re-apply r346985: [ADT] Drop llvm::Optional clang-specific
optimization for trivially copyable types
Remove a test case that was added with the optimization we are now
removing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@347004 91177308-0d34-0410-b5e6-96231b3b80d8
---
include/llvm/ADT/Optional.h | 18 ------------------
unittests/ADT/OptionalTest.cpp | 8 --------
2 files changed, 26 deletions(-)
diff --git a/include/llvm/ADT/Optional.h b/include/llvm/ADT/Optional.h
index 353e5d0..9fe9b28 100644
--- a/include/llvm/ADT/Optional.h
+++ b/include/llvm/ADT/Optional.h
@@ -108,24 +108,6 @@ template <typename T, bool IsPodLike> struct OptionalStorage {
}
};
-#if !defined(__GNUC__) || defined(__clang__) // GCC up to GCC7 miscompiles this.
-/// Storage for trivially copyable types only.
-template <typename T> struct OptionalStorage<T, true> {
- AlignedCharArrayUnion<T> storage;
- bool hasVal = false;
-
- OptionalStorage() = default;
-
- OptionalStorage(const T &y) : hasVal(true) { new (storage.buffer) T(y); }
- OptionalStorage &operator=(const T &y) {
- *reinterpret_cast<T *>(storage.buffer) = y;
- hasVal = true;
- return *this;
- }
-
- void reset() { hasVal = false; }
-};
-#endif
} // namespace optional_detail
template <typename T> class Optional {
diff --git a/unittests/ADT/OptionalTest.cpp b/unittests/ADT/OptionalTest.cpp
index 2e09c53..20bc9da 100644
--- a/unittests/ADT/OptionalTest.cpp
+++ b/unittests/ADT/OptionalTest.cpp
@@ -518,13 +518,5 @@ TEST_F(OptionalTest, OperatorGreaterEqual) {
CheckRelation<GreaterEqual>(InequalityLhs, InequalityRhs, !IsLess);
}
-#if __has_feature(is_trivially_copyable) && defined(_LIBCPP_VERSION)
-static_assert(std::is_trivially_copyable<Optional<int>>::value,
- "Should be trivially copyable");
-static_assert(
- !std::is_trivially_copyable<Optional<NonDefaultConstructible>>::value,
- "Shouldn't be trivially copyable");
-#endif
-
} // end anonymous namespace
--
1.8.3.1