SemaTemplateDeduction - silence static analyzer getAs<> null dereference warnings. NFCI.

The static analyzer is warning about potential null dereferences, but in these cases we should be able to use castAs<> directly and if not assert will fire for us.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375443 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaTemplateDeduction.cpp

@@ -3826,8 +3826,7 @@ Sema::TemplateDeductionResult Sema::DeduceTemplateArguments(
   if (Args.size() < Function->getMinRequiredArguments() && !PartialOverloading)
     return TDK_TooFewArguments;
   else if (TooManyArguments(NumParams, Args.size(), PartialOverloading)) {
-    const FunctionProtoType *Proto
-      = Function->getType()->getAs<FunctionProtoType>();
+    const auto *Proto = Function->getType()->castAs<FunctionProtoType>();
     if (Proto->isTemplateVariadic())
       /* Do nothing */;
     else if (!Proto->isVariadic())
@@ -3965,11 +3964,8 @@ QualType Sema::adjustCCAndNoReturn(QualType ArgFunctionType,
   if (ArgFunctionType.isNull())
     return ArgFunctionType;
 
-  const FunctionProtoType *FunctionTypeP =
-      FunctionType->castAs<FunctionProtoType>();
-  const FunctionProtoType *ArgFunctionTypeP =
-      ArgFunctionType->getAs<FunctionProtoType>();
-
+  const auto *FunctionTypeP = FunctionType->castAs<FunctionProtoType>();
+  const auto *ArgFunctionTypeP = ArgFunctionType->castAs<FunctionProtoType>();
   FunctionProtoType::ExtProtoInfo EPI = ArgFunctionTypeP->getExtProtoInfo();
   bool Rebuild = false;