[all-commits] [llvm/llvm-project] 591b02: [AMDGPU] Optimized indirect multi-VGPR addressing

[Stanislav Mekhanoshin via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 591b029f40f7f23b298d2f4718d7552f4f7f7fac
      https://github.com/llvm/llvm-project/commit/591b029f40f7f23b298d2f4718d7552f4f7f7fac
  Author: Stanislav Mekhanoshin <Stanislav.Mekhanoshin at amd.com>
  Date:   2020-05-13 (Wed, 13 May 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
    M llvm/test/CodeGen/AMDGPU/extract_vector_dynelt.ll
    M llvm/test/CodeGen/AMDGPU/indirect-addressing-si.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_dynelt.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_elt.ll

  Log Message:
  -----------
  [AMDGPU] Optimized indirect multi-VGPR addressing

SelectMOVRELOffset prevents peeling of a constant from an index
if final base could be negative. isBaseWithConstantOffset() succeeds
if a value is an "add" or "or" operator. In case of "or" it shall
be an add-like "or" which never changes a sign of the sum given a
non-negative offset. I.e. we can safely allow peeling if operator is
an "or".

Differential Revision: https://reviews.llvm.org/D79898