[VPlan] Replace TTI::getOperandInfo with Ctx.getOperandInfo (NFC).

Update to use VPlan-based implementation of getOperandInfo, removing
uses of underlying IR references.

Author: fhahn

llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp

@@ -1785,10 +1785,7 @@ InstructionCost VPWidenRecipe::computeCost(ElementCount VF,
     VPValue *RHS = getOperand(1);
     // Certain instructions can be cheaper to vectorize if they have a constant
     // second vector operand. One example of this are shifts on x86.
-    TargetTransformInfo::OperandValueInfo RHSInfo = {
-        TargetTransformInfo::OK_AnyValue, TargetTransformInfo::OP_None};
-    if (RHS->isLiveIn())
-      RHSInfo = Ctx.TTI.getOperandInfo(RHS->getLiveInIRValue());
+    TargetTransformInfo::OperandValueInfo RHSInfo = Ctx.getOperandInfo(RHS);
 
     if (RHSInfo.Kind == TargetTransformInfo::OK_AnyValue &&
         getOperand(1)->isDefinedOutsideLoopRegions())
@@ -2888,8 +2885,9 @@ InstructionCost VPWidenMemoryRecipe::computeCost(ElementCount VF,
     Cost +=
         Ctx.TTI.getMaskedMemoryOpCost(Opcode, Ty, Alignment, AS, Ctx.CostKind);
   } else {
-    TTI::OperandValueInfo OpInfo =
-        Ctx.TTI.getOperandInfo(Ingredient.getOperand(0));
+    TTI::OperandValueInfo OpInfo = Ctx.getOperandInfo(
+        isa<VPWidenLoadRecipe, VPWidenLoadEVLRecipe>(this) ? getOperand(0)
+                                                           : getOperand(1));
     Cost += Ctx.TTI.getMemoryOpCost(Opcode, Ty, Alignment, AS, Ctx.CostKind,
                                     OpInfo, &Ingredient);
   }