[all-commits] [llvm/llvm-project] cfa2d0: [AMDGPU] Wave32 CodeGen for amdgcn.ballot.i64

Pierre van Houtryve via All-commits all-commits at lists.llvm.org
Thu Jul 13 06:21:13 PDT 2023

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cfa2d0a3aa0beb5422107dc9943cb0eae6d93896
  Author: pvanhout <pierre.vanhoutryve at amd.com>
  Date:   2023-07-13 (Thu, 13 Jul 2023)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
    M llvm/lib/Target/AMDGPU/VOPCInstructions.td
    A llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ballot.i64.wave32.ll

  Log Message:
  [AMDGPU] Wave32 CodeGen for amdgcn.ballot.i64

A recent addition to the device libs, `__ockl_dm_trim`, caused a series of
failures at O0 due to a i64 ballot intrinsic being inlined into a wave32 function.

The quick fix for this is to support codegen for this rare case.
A proper long-term fix for this type of issue is still being discussed.

Fixes SWDEV-408929, SWDEV-408957, SWDEV-409885, SWDEV-410193

Reviewed By: #amdgpu, arsenm

Differential Revision: https://reviews.llvm.org/D155050

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