[all-commits] [llvm/llvm-project] 7f0a88: [AMDGPU] Track liveins for max-ilp-sched-strategy

[Jeffrey Byrnes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7f0a881e6c3513914fd51b9ad3b3ac0b556af807
      https://github.com/llvm/llvm-project/commit/7f0a881e6c3513914fd51b9ad3b3ac0b556af807
  Author: Jeffrey Byrnes <JeffreyByrnes at amd.com>
  Date:   2023-04-27 (Thu, 27 Apr 2023)

  Changed paths:
    M llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
    A llvm/test/CodeGen/AMDGPU/schedule-ilp-liveness-tracking.mir

  Log Message:
  -----------
  [AMDGPU] Track liveins for max-ilp-sched-strategy

Even if optimizing for ILP, it is still useful to track RP to avoid spilling. Given that, we need to maintin consistent liveness state with the RP tracker. This patch makes RP tracking consistent by updating for liveins.

Otherwise, we should completely eliminate RP tracking for this scheduler (checkScheduling, initCandidate).

Differential Revision: https://reviews.llvm.org/D149358