[all-commits] [llvm/llvm-project] 17bc95: [AMDGPU] Optionally Use GCNRPTrackers during sched...

[Jeffrey Byrnes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 17bc959961aa5792821516b547100316fc886ab4
      https://github.com/llvm/llvm-project/commit/17bc959961aa5792821516b547100316fc886ab4
  Author: Jeffrey Byrnes <jeffrey.byrnes at amd.com>
  Date:   2024-10-09 (Wed, 09 Oct 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/GCNIterativeScheduler.cpp
    M llvm/lib/Target/AMDGPU/GCNRegPressure.cpp
    M llvm/lib/Target/AMDGPU/GCNRegPressure.h
    M llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
    M llvm/lib/Target/AMDGPU/GCNSchedStrategy.h
    M llvm/test/CodeGen/AMDGPU/high-RP-reschedule.mir
    M llvm/test/CodeGen/AMDGPU/pr51516.mir
    A llvm/test/CodeGen/AMDGPU/schedule-amdgpu-tracker-physreg-crash.ll
    A llvm/test/CodeGen/AMDGPU/schedule-amdgpu-tracker-physreg.ll
    A llvm/test/CodeGen/AMDGPU/schedule-amdgpu-trackers.ll
    M llvm/test/CodeGen/AMDGPU/schedule-regpressure-ilp-metric-spills.mir
    M llvm/test/CodeGen/AMDGPU/schedule-relaxed-occupancy.ll

  Log Message:
  -----------
  [AMDGPU] Optionally Use GCNRPTrackers during scheduling (#93090)

This adds the ability to use the GCNRPTrackers during scheduling. These trackers have several advantages over the generic trackers: 1. global live-thru trackers, 2. subregister based RP deltas, and 3. flexible vreg -> PressureSet mappings.

This feature is off-by-default to ease with the roll-out process. In particular, when using the optional trackers, the scheduler will still maintain the generic trackers leading to unnecessary compile time.



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