llvm-project

83eea87a - [VPlan] Create header phis once, after constructing VPlan0 (NFC). (#168291)

[VPlan] Create header phis once, after constructing VPlan0 (NFC). (#168291) Together with https://github.com/llvm/llvm-project/pull/168289 & https://github.com/llvm/llvm-project/pull/166099 we can construct header phis once up front, after creating VPlan0, as the induction/reduction/first-order-recurrence classification applies across all VFs. Depends on https://github.com/llvm/llvm-project/pull/168289 & https://github.com/llvm/llvm-project/pull/166099 PR: https://github.com/llvm/llvm-project/pull/168291