[PATCH] D30846: AMDGPU: Unify divergent function exits.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: tpr, dstuttard, tony-tye, yaxunl, mgorny, nhaehnle, wdng, kzhuravl.

StructurizeCFG can't handle cases with multiple
returns creating regions with multiple exits.
Create a copy of UnifyFunctionExitNodes that only
unifies exit nodes that skips exit nodes
with uniform branch sources.


https://reviews.llvm.org/D30846

Files:
  include/llvm/IR/IntrinsicsAMDGPU.td
  lib/Target/AMDGPU/AMDGPU.h
  lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  lib/Target/AMDGPU/AMDGPUUnifyDivergentExitNodes.cpp
  lib/Target/AMDGPU/CMakeLists.txt
  lib/Target/AMDGPU/SIInstrFormats.td
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstructions.td
  test/CodeGen/AMDGPU/branch-condition-and.ll
  test/CodeGen/AMDGPU/multi-divergent-exit-region.ll
  test/CodeGen/AMDGPU/ret_jump.ll
  test/CodeGen/AMDGPU/si-annotate-cf-noloop.ll
  test/CodeGen/AMDGPU/si-lower-control-flow-unreachable-block.ll
  test/CodeGen/AMDGPU/valu-i1.ll

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