Remove assert, add comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115009 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMFastISel.cpp

@@ -562,7 +562,7 @@ bool ARMFastISel::ARMEmitLoad(EVT VT, unsigned &ResultReg,
   bool isFloat = false;
   switch (VT.getSimpleVT().SimpleTy) {
     default:
-      assert(false && "Trying to emit for an unhandled type!");
+      // This is mostly going to be Neon/vector support.
       return false;
     case MVT::i16:
       Opc = isThumb ? ARM::tLDRH : ARM::LDRH;