[all-commits] [llvm/llvm-project] c16f77: [AMDGPU] Move kill lowering to WQM pass and add li...

[Carl Ritson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c16f776028ddd39a4d5ea39d5c3831b1bcbb8c02
      https://github.com/llvm/llvm-project/commit/c16f776028ddd39a4d5ea39d5c3831b1bcbb8c02
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2021-02-11 (Thu, 11 Feb 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInsertSkips.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstructions.td
    M llvm/lib/Target/AMDGPU/SILowerControlFlow.cpp
    M llvm/lib/Target/AMDGPU/SIOptimizeExecMasking.cpp
    M llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_pixelshader.ll
    M llvm/test/CodeGen/AMDGPU/early-term.mir
    R llvm/test/CodeGen/AMDGPU/insert-skips-kill-uncond.mir
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.kill.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.wqm.vote.ll
    M llvm/test/CodeGen/AMDGPU/skip-if-dead.ll
    M llvm/test/CodeGen/AMDGPU/transform-block-with-return-to-epilog.ll
    M llvm/test/CodeGen/AMDGPU/vcmpx-exec-war-hazard.mir
    M llvm/test/CodeGen/AMDGPU/vcmpx-permlane-hazard.mir
    M llvm/test/CodeGen/AMDGPU/wave32.ll
    M llvm/test/CodeGen/AMDGPU/wqm.ll

  Log Message:
  -----------
  [AMDGPU] Move kill lowering to WQM pass and add live mask tracking

Move implementation of kill intrinsics to WQM pass. Add live lane
tracking by updating a stored exec mask when lanes are killed.
Use live lane tracking to enable early termination of shader
at any point in control flow.

Reviewed By: piotr

Differential Revision: https://reviews.llvm.org/D94746