[LV][NFC] Unify printing for WidenEVLReicpe with other EVL recipes (#108177)

Author: LiqinWeng

llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp

@@ -1353,9 +1353,9 @@ void VPWidenRecipe::print(raw_ostream &O, const Twine &Indent,
 
 void VPWidenEVLRecipe::print(raw_ostream &O, const Twine &Indent,
                              VPSlotTracker &SlotTracker) const {
-  O << Indent << "WIDEN-VP ";
+  O << Indent << "WIDEN ";
   printAsOperand(O, SlotTracker);
-  O << " = " << Instruction::getOpcodeName(getOpcode());
+  O << " = vp." << Instruction::getOpcodeName(getOpcode());
   printFlags(O);
   printOperands(O, SlotTracker);
 }

llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-intrinsics.ll

@@ -31,7 +31,7 @@ define void @foo(ptr noalias %a, ptr noalias %b, ptr noalias %c, i64 %N) {
 ; IF-EVL-NEXT:    CLONE ir<[[GEP2:%.+]]> = getelementptr inbounds ir<%c>, vp<[[ST]]>
 ; IF-EVL-NEXT:    vp<[[PTR2:%[0-9]+]]> = vector-pointer ir<[[GEP2]]>
 ; IF-EVL-NEXT:    WIDEN ir<[[LD2:%.+]]> = vp.load vp<[[PTR2]]>, vp<[[EVL]]>
-; IF-EVL-NEXT:    WIDEN-VP ir<[[ADD:%.+]]> = add nsw ir<[[LD2]]>, ir<[[LD1]]>, vp<[[EVL]]>
+; IF-EVL-NEXT:    WIDEN ir<[[ADD:%.+]]> = vp.add nsw ir<[[LD2]]>, ir<[[LD1]]>, vp<[[EVL]]>
 ; IF-EVL-NEXT:    CLONE ir<[[GEP3:%.+]]> = getelementptr inbounds ir<%a>, vp<[[ST]]>
 ; IF-EVL-NEXT:    vp<[[PTR3:%[0-9]+]]> = vector-pointer ir<[[GEP3]]>
 ; IF-EVL-NEXT:    WIDEN vp.store vp<[[PTR3]]>, ir<[[ADD]]>, vp<[[EVL]]>