llvm-project

8c83355d - [VPlan] Handle VPIRPhi in VPRecipeBase::isPhi (NFC).

[VPlan] Handle VPIRPhi in VPRecipeBase::isPhi (NFC). Also handle VPIRPhi in VPRecipeBase::isPhi, to simplify existing code dealing with VPIRPhis. Suggested as part of https://github.com/llvm/llvm-project/pull/136455.