[clang] [llvm] [clang] Add support for emitting DW_AT_defaulted (PR #213188)

[Alex Langford via cfe-commits]

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@@ -2504,6 +2504,19 @@ llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction(
   if (Method->getCanonicalDecl()->isDeleted())
     SPFlags |= llvm::DISubprogram::SPFlagDeleted;
 
+  const bool isExplicitlyDefaultable =
+      isa<CXXDestructorDecl>(Method) ||
+      (isa<CXXConstructorDecl>(Method) &&
+       cast<CXXConstructorDecl>(Method)->isDefaultConstructor()) ||
+      Method->isCopyOrMoveConstructorOrAssignment();
+  if (Method->isExplicitlyDefaulted())
+    SPFlags |= Method->isOutOfLine()
+                   ? llvm::DISubprogram::SPFlagDefaultedOutOfClass
+                   : llvm::DISubprogram::SPFlagDefaultedInClass;
+  else if (isExplicitlyDefaultable && !Method->isImplicit() &&
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bulbazord wrote:

I think it should be `isImplicit` because we don't want to emit any attributes for artificial (i.e. compiler-generated) constructors/destructors.

https://github.com/llvm/llvm-project/pull/213188