Revert "Masked Vector Load and Store Intrinsics."

This reverts commit r222632 (and follow-up r222636), which caused a host
of LNT failures on an internal bot.  I'll respond to the commit on the
list with a reproduction of one of the failures.

Conflicts:
	lib/Target/X86/X86TargetTransformInfo.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222936 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/CodeGenTarget.cpp

@@ -537,8 +537,7 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
       // variants with iAny types; otherwise, if the intrinsic is not
       // overloaded, all the types can be specified directly.
       assert(((!TyEl->isSubClassOf("LLVMExtendedType") &&
-               !TyEl->isSubClassOf("LLVMTruncatedType") &&
-               !TyEl->isSubClassOf("LLVMVectorSameWidth")) ||
+               !TyEl->isSubClassOf("LLVMTruncatedType")) ||
               VT == MVT::iAny || VT == MVT::vAny) &&
              "Expected iAny or vAny type");
     } else