[SemaCXX patch] Patch to fix a crash when a 'delete' constructor

is being accessed. Reviewed by Richard Smith.
rdar://20281011

llvm-svn: 234912

clang/lib/Sema/SemaOverload.cpp

@@ -2954,7 +2954,10 @@ IsInitializerListConstructorConversion(Sema &S, Expr *From, QualType ToType,
   bool HadMultipleCandidates = (CandidateSet.size() > 1);
 
   OverloadCandidateSet::iterator Best;
-  switch (CandidateSet.BestViableFunction(S, From->getLocStart(), Best, true)) {
+  switch (auto Result = 
+            CandidateSet.BestViableFunction(S, From->getLocStart(), 
+                                            Best, true)) {
+  case OR_Deleted:
   case OR_Success: {
     // Record the standard conversion we used and the conversion function.
     CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function);
@@ -2967,13 +2970,11 @@ IsInitializerListConstructorConversion(Sema &S, Expr *From, QualType ToType,
     User.After.setAsIdentityConversion();
     User.After.setFromType(ThisType->getAs<PointerType>()->getPointeeType());
     User.After.setAllToTypes(ToType);
-    return OR_Success;
+    return Result;
   }
 
   case OR_No_Viable_Function:
     return OR_No_Viable_Function;
-  case OR_Deleted:
-    return OR_Deleted;
   case OR_Ambiguous:
     return OR_Ambiguous;
   }

clang/test/SemaCXX/cxx11-call-to-deleted-constructor.cpp

@@ -0,0 +1,40 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+// rdar://20281011
+
+namespace std {
+template<class _Ep> class initializer_list { };
+}
+
+namespace cva {
+
+template <class VT, unsigned int ROWS = 0, unsigned int COLS = 0>
+class Matrix {
+public:
+
+    typedef VT value_type;
+    inline __attribute__((always_inline)) value_type& at();
+};
+
+template <class VT, unsigned int SIZE> using Vector = Matrix<VT, SIZE, 1>;
+
+template <class VT>
+using RGBValue = Vector<VT, 3>;
+using RGBFValue = RGBValue<float>;
+
+template <class VT> class Matrix<VT, 0, 0> { // expected-note {{passing argument to parameter here}}
+public:
+    typedef VT value_type;
+    Matrix(const unsigned int nRows, const unsigned int nColumns, const value_type* data = nullptr);
+
+    Matrix(const std::initializer_list<value_type>& list) = delete; // expected-note {{'Matrix' has been explicitly marked deleted here}}
+
+};
+
+void getLaplacianClosedForm()
+{
+    Matrix<double> winI(0, 3);
+    RGBFValue* inputPreL;
+    winI = { inputPreL->at() }; // expected-error {{call to deleted constructor of 'cva::Matrix<double, 0, 0> &&'}}
+}
+
+}