oontvoo updated this revision to Diff 276077.
oontvoo added a comment.
lint
Repository:
rG LLVM Github Monorepo
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https://reviews.llvm.org/D83263/new/
https://reviews.llvm.org/D83263
Files:
clang/lib/Sema/SemaDeclCXX.cpp
clang/test/SemaCXX/attr-trivial-abi.cpp
clang/test/SemaObjCXX/attr-trivial-abi.mm
Index: clang/test/SemaObjCXX/attr-trivial-abi.mm
===================================================================
--- clang/test/SemaObjCXX/attr-trivial-abi.mm
+++ clang/test/SemaObjCXX/attr-trivial-abi.mm
@@ -57,7 +57,7 @@
};
// Do not warn when 'trivial_abi' is used to annotate a template class.
-template<class T>
+template <class T>
struct __attribute__((trivial_abi)) S10 {
T p;
};
@@ -76,21 +76,27 @@
__weak id b;
};
-template<class T>
+template <class T>
struct __attribute__((trivial_abi)) S15 : S14<T> {
};
S15<int> s15;
-template<class T>
+template <class T>
struct __attribute__((trivial_abi)) S16 {
S14<T> a;
};
S16<int> s16;
-template<class T>
+template <class T>
struct __attribute__((trivial_abi)) S17 { // expected-warning {{'trivial_abi' cannot be applied to 'S17'}} expected-note {{has a __weak field}}
+ S17();
+ S17(S17 &&);
+ __weak id a;
+};
+
+struct __attribute__((trivial_abi)) S18 { // expected-warning {{'trivial_abi' cannot be applied to 'S18'}} expected-note {{has a __weak field}}
__weak id a;
};
Index: clang/test/SemaCXX/attr-trivial-abi.cpp
===================================================================
--- /dev/null
+++ clang/test/SemaCXX/attr-trivial-abi.cpp
@@ -0,0 +1,105 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11
+
+void __attribute__((trivial_abi)) foo(); // expected-warning {{'trivial_abi' attribute only applies to classes}}
+
+// Should not crash.
+template <class>
+class __attribute__((trivial_abi)) a { a(a &&); };
+
+struct [[clang::trivial_abi]] S0 {
+ int a;
+};
+
+struct __attribute__((trivial_abi)) S1 {
+ int a;
+};
+
+struct __attribute__((trivial_abi)) S3 { // expected-warning {{'trivial_abi' cannot be applied to 'S3'}} expected-note {{is polymorphic}}
+ virtual void m();
+};
+
+struct S3_2 {
+ virtual void m();
+} __attribute__((trivial_abi)); // expected-warning {{'trivial_abi' cannot be applied to 'S3_2'}} expected-note {{is polymorphic}}
+
+struct __attribute__((trivial_abi)) S3_3 { // expected-warning {{'trivial_abi' cannot be applied to 'S3_3'}} expected-note {{has a field of a non-trivial class type}}
+ S3_3(S3_3 &&);
+ S3_2 s32;
+};
+
+struct S4 {
+ int a;
+};
+
+struct __attribute__((trivial_abi)) S5 : public virtual S4 { // expected-warning {{'trivial_abi' cannot be applied to 'S5'}} expected-note {{has a virtual base}}
+};
+
+struct __attribute__((trivial_abi)) S9 : public S4 {
+};
+
+struct __attribute__((trivial_abi(1))) S8 { // expected-error {{'trivial_abi' attribute takes no arguments}}
+ int a;
+};
+
+// Do not warn when 'trivial_abi' is used to annotate a template class.
+template <class T>
+struct __attribute__((trivial_abi)) S10 {
+ T p;
+};
+
+S10<int *> p1;
+
+template <class T>
+struct S14 {
+ T a;
+};
+
+template <class T>
+struct __attribute__((trivial_abi)) S15 : S14<T> {
+};
+
+S15<int> s15;
+
+template <class T>
+struct __attribute__((trivial_abi)) S16 {
+ S14<T> a;
+};
+
+S16<int> s16;
+
+template <class T>
+struct __attribute__((trivial_abi)) S17 {
+};
+
+S17<int> s17;
+
+namespace deletedCopyMoveConstructor {
+struct __attribute__((trivial_abi)) CopyMoveDeleted { // expected-warning {{'trivial_abi' cannot be applied to 'CopyMoveDeleted'}} expected-note {{copy constructors and move constructors are all deleted}}
+ CopyMoveDeleted(const CopyMoveDeleted &) = delete;
+ CopyMoveDeleted(CopyMoveDeleted &&) = delete;
+};
+
+struct __attribute__((trivial_abi)) S18 { // expected-warning {{'trivial_abi' cannot be applied to 'S18'}} expected-note {{copy constructors and move constructors are all deleted}}
+ CopyMoveDeleted a;
+};
+
+struct __attribute__((trivial_abi)) CopyDeleted {
+ CopyDeleted(const CopyDeleted &) = delete;
+ CopyDeleted(CopyDeleted &&) = default;
+};
+
+struct __attribute__((trivial_abi)) MoveDeleted {
+ MoveDeleted(const MoveDeleted &) = default;
+ MoveDeleted(MoveDeleted &&) = delete;
+};
+
+struct __attribute__((trivial_abi)) S19 { // expected-warning {{'trivial_abi' cannot be applied to 'S19'}} expected-note {{copy constructors and move constructors are all deleted}}
+ CopyDeleted a;
+ MoveDeleted b;
+};
+
+// This is fine since the move constructor isn't deleted.
+struct __attribute__((trivial_abi)) S20 {
+ int &&a; // a member of rvalue reference type deletes the copy constructor.
+};
+} // namespace deletedCopyMoveConstructor
Index: clang/lib/Sema/SemaDeclCXX.cpp
===================================================================
--- clang/lib/Sema/SemaDeclCXX.cpp
+++ clang/lib/Sema/SemaDeclCXX.cpp
@@ -9719,6 +9719,10 @@
// Ill-formed if the copy and move constructors are deleted.
auto HasNonDeletedCopyOrMoveConstructor = [&]() {
+ // If the type is dependent, then assume it might have
+ // implicit copy or move ctor because we won't know yet at this point.
+ if (RD.isDependentType())
+ return true;
if (RD.needsImplicitCopyConstructor() &&
!RD.defaultedCopyConstructorIsDeleted())
return true;
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