Only trigger the initialize-an-array-via-elementwise-copy/move code

generation when we're dealing with an implicitly-defined copy or move
constructor. And, actually set the implicitly-defined bit for
implicitly-defined constructors and destructors. Should fix self-host.

llvm-svn: 140334

Author: DougGregor

clang/lib/CodeGen/CGClass.cpp

@@ -573,7 +573,8 @@ static void EmitMemberInitializer(CodeGenFunction &CGF,
     llvm::Value *ArrayIndexVar = 0;
     const ConstantArrayType *Array
       = CGF.getContext().getAsConstantArrayType(FieldType);
-    if (Array && Constructor->isCopyOrMoveConstructor()) {
+    if (Array && Constructor->isImplicitlyDefined() &&
+        Constructor->isCopyOrMoveConstructor()) {
       llvm::Type *SizeTy
         = CGF.ConvertType(CGF.getContext().getSizeType());
 

clang/lib/Sema/SemaDeclCXX.cpp

@@ -6963,7 +6963,7 @@ void Sema::DefineImplicitDestructor(SourceLocation CurrentLocation,
 
   SourceLocation Loc = Destructor->getLocation();
   Destructor->setBody(new (Context) CompoundStmt(Context, 0, 0, Loc, Loc));
-
+  Destructor->setImplicitlyDefined(true);
   Destructor->setUsed();
   MarkVTableUsed(CurrentLocation, ClassDecl);
 
@@ -8301,10 +8301,10 @@ void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
                                                MultiStmtArg(*this, 0, 0), 
                                                /*isStmtExpr=*/false)
                                                               .takeAs<Stmt>());
+    CopyConstructor->setImplicitlyDefined(true);
   }
 
   CopyConstructor->setUsed();
-
   if (ASTMutationListener *L = getASTMutationListener()) {
     L->CompletedImplicitDefinition(CopyConstructor);
   }
@@ -8464,6 +8464,7 @@ void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
                                                MultiStmtArg(*this, 0, 0), 
                                                /*isStmtExpr=*/false)
                                                               .takeAs<Stmt>());
+    MoveConstructor->setImplicitlyDefined(true);
   }
 
   MoveConstructor->setUsed();