[all-commits] [llvm/llvm-project] 045559: [AMDGPU] Add DAG ISel support for preloaded kernel...

[Austin Kerbow via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0455596e1e7fecb6c76de9eba4e2ffc8772eadc2
      https://github.com/llvm/llvm-project/commit/0455596e1e7fecb6c76de9eba4e2ffc8772eadc2
  Author: Austin Kerbow <Austin.Kerbow at amd.com>
  Date:   2023-09-25 (Mon, 25 Sep 2023)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.h
    M llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
    M llvm/lib/Target/AMDGPU/GCNSubtarget.h
    M llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
    M llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.h
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/lib/Target/AMDGPU/SIISelLowering.h
    M llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
    M llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fp64-atomics-gfx90a.ll
    M llvm/test/CodeGen/AMDGPU/dag-divergence-atomic.ll
    M llvm/test/CodeGen/AMDGPU/fp64-atomics-gfx90a.ll
    A llvm/test/CodeGen/AMDGPU/preload-kernarg-header.ll
    A llvm/test/CodeGen/AMDGPU/preload-kernargs.ll

  Log Message:
  -----------
  [AMDGPU] Add DAG ISel support for preloaded kernel arguments

This patch adds the DAG isel changes for kernel argument preloading.
These changes are not usable with older firmware but subsequent patches
in the series will make the codegen backwards compatible. This patch
should only be submitted alongside that subsequent patch.

Preloading here begins from the start of the kernel arguments until the
amount of arguments indicated by the CL flag
amdgpu-kernarg-preload-count.

Aggregates and arguments passed by-ref are not supported.

Special care for the alignment of the kernarg segment is needed as well
as consideration of the alignment of addressable SGPR tuples when we
cannot directly use misaligned large tuples that the arguments are
loaded to.

Reviewed By: bcahoon

Differential Revision: https://reviews.llvm.org/D158579