Codegen - 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.

llvm-svn: 373918
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 497f3f7..b281db3 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -9532,7 +9532,7 @@
   // Complex types for the hard float ABI must be passed direct rather than
   // using CoerceAndExpand.
   if (IsFixed && Ty->isComplexType() && FLen && ArgFPRsLeft >= 2) {
-    QualType EltTy = Ty->getAs<ComplexType>()->getElementType();
+    QualType EltTy = Ty->castAs<ComplexType>()->getElementType();
     if (getContext().getTypeSize(EltTy) <= FLen) {
       ArgFPRsLeft -= 2;
       return ABIArgInfo::getDirect();