[AArch64] Return early rather than asserting when Size of value passed to targetShrinkDemandedConstant is not 32 or 64

Author: WillFroom

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -2373,8 +2373,9 @@ bool AArch64TargetLowering::targetShrinkDemandedConstant(
     return false;
 
   unsigned Size = VT.getSizeInBits();
-  assert((Size == 32 || Size == 64) &&
-         "i32 or i64 is expected after legalization.");
+
+  if ((Size != 32) || (Size != 64))
+    return false;
 
   // Exit early if we demand all bits.
   if (DemandedBits.popcount() == Size)