Collapse the three separate initialization paths in
TryStaticImplicitCast (for references, class types, and everything
else, respectively) into a single invocation of
InitializationSequence.

One of the paths (for class types) was the only client of
Sema::TryInitializationByConstructor, which I have eliminated. This
also simplified the interface for much of the cast-checking logic,
eliminating yet more code.

I've kept the representation of C++ functional casts with <> 1
arguments the same, despite the fact that I hate it. That fix will
come soon. To satisfy my paranoia, I've bootstrapped + tested Clang
with these changes.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101549 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 64e0e26..033a36c 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -409,9 +409,7 @@
     // GCC does an implicit conversion to the pointer or integer ValType.  This
     // can fail in some cases (1i -> int**), check for this error case now.
     CastExpr::CastKind Kind = CastExpr::CK_Unknown;
-    CXXMethodDecl *ConversionDecl = 0;
-    if (CheckCastTypes(Arg->getSourceRange(), ValType, Arg, Kind,
-                       ConversionDecl))
+    if (CheckCastTypes(Arg->getSourceRange(), ValType, Arg, Kind))
       return true;
 
     // Okay, we have something that *can* be converted to the right type.  Check