diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 5766773..b9c5620 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -21332,11 +21332,7 @@
   if (X86::isZeroNode(Mask))
     return DAG.getConstant(0, dl, MaskVT);
 
-  if (MaskVT.bitsGT(Mask.getSimpleValueType())) {
-    // Mask should be extended
-    Mask = DAG.getNode(ISD::ANY_EXTEND, dl,
-                       MVT::getIntegerVT(MaskVT.getSizeInBits()), Mask);
-  }
+  assert(MaskVT.bitsLE(Mask.getSimpleValueType()) && "Unexpected mask size!");
 
   if (Mask.getSimpleValueType() == MVT::i64 && Subtarget.is32Bit()) {
     assert(MaskVT == MVT::v64i1 && "Expected v64i1 mask!");