Simplify FunctionDecl::AddRedeclaration a bit by using std::swap.
Fix 'swapping' of attributes to not insert null values into the 
DeclAttrs map.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50612 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index bacb610..d050278 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -153,6 +153,7 @@
   CurFuncDecl = FD;
   FnRetTy = FD->getType()->getAsFunctionType()->getResultType();
 
+  FD->getType().dump();
 
   CurFn = cast<llvm::Function>(CGM.GetAddrOfFunctionDecl(FD, true));
   assert(CurFn->isDeclaration() && "Function already has body?");