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63d9dcdd7e
Fixes #37189 - [x] Changes comply with the [maintainer guide](https://github.com/microsoft/vcpkg-docs/blob/main/vcpkg/contributing/maintainer-guide.md). - [x] SHA512s are updated for each updated download. - [x] The "supports" clause reflects platforms that may be fixed by this new version. - [x] Any fixed [CI baseline](https://github.com/microsoft/vcpkg/blob/master/scripts/ci.baseline.txt) entries are removed from that file. - [x] Any patches that are no longer applied are deleted from the port's directory. - [x] The version database is fixed by rerunning `./vcpkg x-add-version --all` and committing the result. - [x] Only one version is added to each modified port's versions file.
113 lines
4.2 KiB
Diff
113 lines
4.2 KiB
Diff
From 5fcaeaddccc0f7e370bf7bebce113d8d52e1b1bd Mon Sep 17 00:00:00 2001
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From: Shafik Yaghmour <shafik.yaghmour@intel.com>
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Date: Tue, 20 Feb 2024 11:22:39 -0800
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Subject: [PATCH] [Clang][Sema] Fix incorrect rejection default construction of
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union with nontrivial member
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In 765d8a192180f8f33618087b15c022fe758044af we impelemented a fix for incorrect deletion of
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default constructors in unions. This fix missed a case and so this PR will
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extend the fix to cover the additional case.
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Fixes: https://github.com/llvm/llvm-project/issues/81774
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---
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clang/lib/Sema/SemaDeclCXX.cpp | 18 +++++++++++++++---
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.../test/CodeGen/union-non-trivial-member.cpp | 17 +++++++++++++++++
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clang/test/SemaCXX/cxx0x-nontrivial-union.cpp | 11 +++++++++++
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4 files changed, 46 insertions(+), 3 deletions(-)
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Bug Fixes to AST Handling
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^^^^^^^^^^^^^^^^^^^^^^^^^
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diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
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index 79263bc3ff671..25a4b4381ca25 100644
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--- a/clang/lib/Sema/SemaDeclCXX.cpp
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+++ b/clang/lib/Sema/SemaDeclCXX.cpp
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@@ -9442,9 +9442,21 @@ bool SpecialMemberDeletionInfo::shouldDeleteForSubobjectCall(
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int DiagKind = -1;
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- if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted)
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- DiagKind = !Decl ? 0 : 1;
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- else if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous)
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+ if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted) {
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+ if (CSM == Sema::CXXDefaultConstructor && Field &&
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+ Field->getParent()->isUnion()) {
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+ // [class.default.ctor]p2:
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+ // A defaulted default constructor for class X is defined as deleted if
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+ // - X is a union that has a variant member with a non-trivial default
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+ // constructor and no variant member of X has a default member
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+ // initializer
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+ const auto *RD = cast<CXXRecordDecl>(Field->getParent());
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+ if (!RD->hasInClassInitializer())
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+ DiagKind = !Decl ? 0 : 1;
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+ } else {
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+ DiagKind = !Decl ? 0 : 1;
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+ }
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+ } else if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous)
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DiagKind = 2;
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else if (!isAccessible(Subobj, Decl))
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DiagKind = 3;
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diff --git a/clang/test/CodeGen/union-non-trivial-member.cpp b/clang/test/CodeGen/union-non-trivial-member.cpp
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index fdc9fd16911e1..8b055a9970fc7 100644
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--- a/clang/test/CodeGen/union-non-trivial-member.cpp
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+++ b/clang/test/CodeGen/union-non-trivial-member.cpp
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@@ -15,14 +15,25 @@ union UnionNonTrivial {
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non_trivial_constructor b{};
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};
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+struct Handle {
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+ Handle(int) {}
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+};
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+
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+union UnionNonTrivialEqualInit {
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+ int NoState = 0;
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+ Handle CustomState;
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+};
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+
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void f() {
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UnionInt u1;
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UnionNonTrivial u2;
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+ UnionNonTrivialEqualInit u3;
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}
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// CHECK: define dso_local void @_Z1fv()
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// CHECK: call void @_ZN8UnionIntC1Ev
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// CHECK-NEXT: call void @_ZN15UnionNonTrivialC1Ev
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+// CHECK-NEXT: call void @_ZN24UnionNonTrivialEqualInitC1Ev
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// CHECK: define {{.*}}void @_ZN8UnionIntC1Ev
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// CHECK: call void @_ZN8UnionIntC2Ev
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@@ -30,8 +41,14 @@ void f() {
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// CHECK: define {{.*}}void @_ZN15UnionNonTrivialC1Ev
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// CHECK: call void @_ZN15UnionNonTrivialC2Ev
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+// CHECK: define {{.*}}void @_ZN24UnionNonTrivialEqualInitC1Ev
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+// CHECK: call void @_ZN24UnionNonTrivialEqualInitC2Ev
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+
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// CHECK: define {{.*}}void @_ZN8UnionIntC2Ev
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// CHECK: store i32 1000
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// CHECK: define {{.*}}void @_ZN15UnionNonTrivialC2Ev
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// CHECK: call void @_ZN23non_trivial_constructorC1Ev
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+
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+// CHECK: define {{.*}}void @_ZN24UnionNonTrivialEqualInitC2Ev
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+// CHECK: store i32 0
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diff --git a/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp b/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp
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index c7cdf76d850db..833642b3d739a 100644
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--- a/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp
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+++ b/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp
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@@ -188,3 +188,14 @@ static_assert(U2().b.x == 100, "");
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static_assert(U3().b.x == 100, "");
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} // namespace GH48416
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+
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+namespace GH81774 {
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+struct Handle {
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+ Handle(int) {}
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+};
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+// Should be well-formed because NoState has a brace-or-equal-initializer.
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+union a {
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+ int NoState = 0;
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+ Handle CustomState;
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+} b;
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+} // namespace GH81774
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