Fix the ICE when inferScalarTypeForRecipe

Author: Mel-Chen

llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp

@@ -62,6 +62,8 @@ Type *VPTypeAnalysis::inferScalarTypeForRecipe(const VPInstruction *R) {
   case Instruction::ICmp:
   case VPInstruction::ActiveLaneMask:
     return inferScalarType(R->getOperand(1));
+  case VPInstruction::ExplicitVectorLength:
+    return IntegerType::get(Ctx, 32);
   case VPInstruction::FirstOrderRecurrenceSplice:
   case VPInstruction::Not:
     return SetResultTyFromOp();