Implement initialization of a reference (C++ [dcl.init.ref]) as part
of copy initialization. Other pieces of the puzzle:

  - Try/Perform-ImplicitConversion now handles implicit conversions
    that don't involve references.
  - Try/Perform-CopyInitialization uses
    CheckSingleAssignmentConstraints for C. PerformCopyInitialization
    is now used for all argument passing and returning values from a
    function.
  - Diagnose errors with declaring references and const values without
    an initializer. (Uses a new Action callback, ActOnUninitializedDecl).
  
We do not yet have implicit conversion sequences for reference
binding, which means that we don't have any overloading support for
reference parameters yet.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58353 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 7a5e2dd..209914b 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -567,7 +567,7 @@
 bool 
 Sema::PerformImplicitConversion(Expr *&From, QualType ToType)
 {
-  ImplicitConversionSequence ICS = TryCopyInitialization(From, ToType);
+  ImplicitConversionSequence ICS = TryImplicitConversion(From, ToType);
   switch (ICS.ConversionKind) {
   case ImplicitConversionSequence::StandardConversion:
     if (PerformImplicitConversion(From, ToType, ICS.Standard))