Make LookupResult be copyable to avoid decomposing an existing one and

initializing a new one every time a copy is needed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221724 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/AST/UnresolvedSet.h

@@ -98,7 +98,7 @@ class UnresolvedSetImpl {
 private:
   template <unsigned N> friend class UnresolvedSet;
   UnresolvedSetImpl() {}
-  UnresolvedSetImpl(const UnresolvedSetImpl &) LLVM_DELETED_FUNCTION;
+  UnresolvedSetImpl(const UnresolvedSetImpl &) {};
 
 public:
   // We don't currently support assignment through this iterator, so we might

include/clang/Sema/Lookup.h

@@ -132,7 +132,7 @@ public:
     : ResultKind(NotFound),
       Paths(nullptr),
       NamingClass(nullptr),
-      SemaRef(SemaRef),
+      SemaPtr(&SemaRef),
       NameInfo(NameInfo),
       LookupKind(LookupKind),
       IDNS(0),
@@ -154,7 +154,7 @@ public:
     : ResultKind(NotFound),
       Paths(nullptr),
       NamingClass(nullptr),
-      SemaRef(SemaRef),
+      SemaPtr(&SemaRef),
       NameInfo(Name, NameLoc),
       LookupKind(LookupKind),
       IDNS(0),
@@ -174,7 +174,7 @@ public:
     : ResultKind(NotFound),
       Paths(nullptr),
       NamingClass(nullptr),
-      SemaRef(Other.SemaRef),
+      SemaPtr(Other.SemaPtr),
       NameInfo(Other.NameInfo),
       LookupKind(Other.LookupKind),
       IDNS(Other.IDNS),
@@ -305,7 +305,7 @@ public:
     if (!D->isInIdentifierNamespace(IDNS))
       return nullptr;
 
-    if (isHiddenDeclarationVisible() || isVisible(SemaRef, D))
+    if (isHiddenDeclarationVisible() || isVisible(getSema(), D))
       return D;
 
     return getAcceptableDeclSlow(D);
@@ -551,7 +551,7 @@ public:
 
   /// \brief Get the Sema object that this lookup result is searching
   /// with.
-  Sema &getSema() const { return SemaRef; }
+  Sema &getSema() const { return *SemaPtr; }
 
   /// A class for iterating through a result set and possibly
   /// filtering out results.  The results returned are possibly
@@ -630,9 +630,9 @@ public:
 private:
   void diagnose() {
     if (isAmbiguous())
-      SemaRef.DiagnoseAmbiguousLookup(*this);
-    else if (isClassLookup() && SemaRef.getLangOpts().AccessControl)
-      SemaRef.CheckLookupAccess(*this);
+      getSema().DiagnoseAmbiguousLookup(*this);
+    else if (isClassLookup() && getSema().getLangOpts().AccessControl)
+      getSema().CheckLookupAccess(*this);
   }
 
   void setAmbiguous(AmbiguityKind AK) {
@@ -664,7 +664,7 @@ private:
   QualType BaseObjectType;
 
   // Parameters.
-  Sema &SemaRef;
+  Sema *SemaPtr;
   DeclarationNameInfo NameInfo;
   SourceRange NameContextRange;
   Sema::LookupNameKind LookupKind;

lib/Sema/SemaLookup.cpp

@@ -285,7 +285,7 @@ static inline unsigned getIDNS(Sema::LookupNameKind NameKind,
 }
 
 void LookupResult::configure() {
-  IDNS = getIDNS(LookupKind, SemaRef.getLangOpts().CPlusPlus,
+  IDNS = getIDNS(LookupKind, getSema().getLangOpts().CPlusPlus,
                  isForRedeclaration());
 
   // If we're looking for one of the allocation or deallocation
@@ -296,7 +296,7 @@ void LookupResult::configure() {
   case OO_Delete:
   case OO_Array_New:
   case OO_Array_Delete:
-    SemaRef.DeclareGlobalNewDelete();
+    getSema().DeclareGlobalNewDelete();
     break;
 
   default:
@@ -307,7 +307,7 @@ void LookupResult::configure() {
   // up being declared.
   if (IdentifierInfo *Id = NameInfo.getName().getAsIdentifierInfo()) {
     if (unsigned BuiltinID = Id->getBuiltinID()) {
-      if (!SemaRef.Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
+      if (!getSema().Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
         AllowHidden = true;
     }
   }
@@ -400,8 +400,8 @@ void LookupResult::resolveKind() {
     // canonical type.
     if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
       if (!TD->getDeclContext()->isRecord()) {
-        QualType T = SemaRef.Context.getTypeDeclType(TD);
-        if (!UniqueTypes.insert(SemaRef.Context.getCanonicalType(T))) {
+        QualType T = getSema().Context.getTypeDeclType(TD);
+        if (!UniqueTypes.insert(getSema().Context.getCanonicalType(T))) {
           // The type is not unique; pull something off the back and continue
           // at this index.
           Decls[I] = Decls[--N];
@@ -1265,7 +1265,7 @@ static NamedDecl *findAcceptableDecl(Sema &SemaRef, NamedDecl *D) {
 }
 
 NamedDecl *LookupResult::getAcceptableDeclSlow(NamedDecl *D) const {
-  return findAcceptableDecl(SemaRef, D);
+  return findAcceptableDecl(getSema(), D);
 }
 
 /// @brief Perform unqualified name lookup starting from a given