[all-commits] [llvm/llvm-project] 97d9a7: [AMDGPU] Don't remove short branches over kills

[jayfoad via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 97d9a76afc97f48f63056a9f36ecd6bf82774172
      https://github.com/llvm/llvm-project/commit/97d9a76afc97f48f63056a9f36ecd6bf82774172
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2020-02-03 (Mon, 03 Feb 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIRemoveShortExecBranches.cpp
    M llvm/test/CodeGen/AMDGPU/skip-if-dead.ll

  Log Message:
  -----------
  [AMDGPU] Don't remove short branches over kills

Summary:
D68092 introduced a new SIRemoveShortExecBranches optimization pass and
broke some graphics shaders. The problem is that it was removing
branches over KILL pseudo instructions, and the fix is to explicitly
check for that in mustRetainExeczBranch.

Reviewers: critson, arsenm, nhaehnle, cdevadas, hakzsam

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

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73771