[FOLD] remove redundant calls to ActOnDependentIdExpression

clang/lib/Sema/SemaExpr.cpp

@@ -2718,34 +2718,6 @@ Sema::ActOnIdExpression(Scope *S, CXXScopeSpec &SS,
     return ExprError();
   }
 
-  // C++ [temp.dep.expr]p3:
-  //   An id-expression is type-dependent if it contains:
-  //     -- an identifier that was declared with a dependent type,
-  //        (note: handled after lookup)
-  //     -- a template-id that is dependent,
-  //        (note: handled in BuildTemplateIdExpr)
-  //     -- a conversion-function-id that specifies a dependent type,
-  //     -- a nested-name-specifier that contains a class-name that
-  //        names a dependent type.
-  // Determine whether this is a member of an unknown specialization;
-  // we need to handle these differently.
-  bool DependentID = false;
-  if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName &&
-      Name.getCXXNameType()->isDependentType()) {
-    DependentID = true;
-  } else if (SS.isSet()) {
-    if (DeclContext *DC = computeDeclContext(SS, false)) {
-      if (RequireCompleteDeclContext(SS, DC))
-        return ExprError();
-    } else {
-      DependentID = true;
-    }
-  }
-
-  if (DependentID)
-    return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
-                                      IsAddressOfOperand, TemplateArgs);
-
   // BoundsSafety: This specially handles arguments of bounds attributes
   // appertains to a type of C struct field such that the name lookup
   // within a struct finds the member name, which is not the case for other
@@ -2781,7 +2753,7 @@ Sema::ActOnIdExpression(Scope *S, CXXScopeSpec &SS,
                            &AssumedTemplate))
       return ExprError();
 
-    if (R.wasNotFoundInCurrentInstantiation())
+    if (R.wasNotFoundInCurrentInstantiation() || SS.isInvalid())
       return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
                                         IsAddressOfOperand, TemplateArgs);
   } else {
@@ -2791,7 +2763,7 @@ Sema::ActOnIdExpression(Scope *S, CXXScopeSpec &SS,
 
     // If the result might be in a dependent base class, this is a dependent
     // id-expression.
-    if (R.wasNotFoundInCurrentInstantiation())
+    if (R.wasNotFoundInCurrentInstantiation() || SS.isInvalid())
       return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo,
                                         IsAddressOfOperand, TemplateArgs);
 
@@ -3177,7 +3149,7 @@ bool Sema::UseArgumentDependentLookup(const CXXScopeSpec &SS,
     return false;
 
   // Never if a scope specifier was provided.
-  if (SS.isSet())
+  if (SS.isNotEmpty())
     return false;
 
   // Only in C++ or ObjC++.

clang/lib/Sema/SemaLookup.cpp

@@ -2771,16 +2771,19 @@ bool Sema::LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
             ObjectType->castAs<TagType>()->isBeingDefined()) &&
            "Caller should have completed object type");
   } else if (SS && SS->isNotEmpty()) {
-    if (NestedNameSpecifier *NNS = SS->getScopeRep();
-        NNS->getKind() == NestedNameSpecifier::Super)
-      return LookupInSuper(R, NNS->getAsRecordDecl());
     // This nested-name-specifier occurs after another nested-name-specifier,
     // so long into the context associated with the prior nested-name-specifier.
     if ((DC = computeDeclContext(*SS, EnteringContext))) {
       // The declaration context must be complete.
       if (!DC->isDependentContext() && RequireCompleteDeclContext(*SS, DC))
         return false;
       R.setContextRange(SS->getRange());
+      // FIXME: '__super' lookup semantics could be implemented by a
+      // LookupResult::isSuperLookup flag which skips the initial search of
+      // the lookup context in LookupQualified.
+      if (NestedNameSpecifier *NNS = SS->getScopeRep();
+          NNS->getKind() == NestedNameSpecifier::Super)
+        return LookupInSuper(R, NNS->getAsRecordDecl());
     }
     IsDependent = !DC && isDependentScopeSpecifier(*SS);
   } else {