[all-commits] [llvm/llvm-project] ba8110: AMDGPU/GFX10: Fix NSA reassign pass when operands ...

[Nicolai Hähnle via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ba8110161dfb096bbc63039afd87ff6417328f91
      https://github.com/llvm/llvm-project/commit/ba8110161dfb096bbc63039afd87ff6417328f91
  Author: Nicolai Hähnle <nicolai.haehnle at amd.com>
  Date:   2020-02-01 (Sat, 01 Feb 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/GCNNSAReassign.cpp
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.nsa.ll

  Log Message:
  -----------
  AMDGPU/GFX10: Fix NSA reassign pass when operands are undef

Summary:
Virtual registers that are undef have an empty LiveInterval at this
point, which means beginIndex() and endIndex() cannot be used. We
only need those indices to determine the range in which to scan for
affected other NSA instructions, and undef operands cannot contribute
to that range.

Reviewers: arsenm, rampitec, mareko

Subscribers: kzhuravl, jvesely, wdng, yaxunl, dstuttard, tpr, t-tye, hiraditya, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73831