update some comments.

llvm-svn: 41218
diff --git a/clang/CodeGen/CGAggExpr.cpp b/clang/CodeGen/CGAggExpr.cpp
index 84a69b1..93f78a4 100644
--- a/clang/CodeGen/CGAggExpr.cpp
+++ b/clang/CodeGen/CGAggExpr.cpp
@@ -34,8 +34,6 @@
     : CGF(cgf), DestPtr(destPtr), VolatileDest(volatileDest) {
   }
 
-  typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy;
-  
   //===--------------------------------------------------------------------===//
   //                               Utilities
   //===--------------------------------------------------------------------===//
@@ -163,6 +161,7 @@
 void CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr,
                                         llvm::Value *SrcPtr, QualType Ty) {
   // Don't use memcpy for complex numbers.
+  // FIXME: split complex number handling out of here.
   if (Ty->isComplexType()) {
     llvm::Value *Real, *Imag;
     EmitLoadOfComplex(SrcPtr, Real, Imag);