[PATCH] D62198: StructurizeCFG: Relax uniformity checks.

[Neil Henning via Phabricator via llvm-commits]

sheredom created this revision.
sheredom added a reviewer: nhaehnle.
Herald added subscribers: llvm-commits, jvesely.
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This change relaxes the checks for hasOnlyUniformBranches such that our region is uniform if:

1. All conditional branches that are direct children are uniform.
2. And either: a. All sub-regions are uniform. b. There is one or less conditional branches among the direct children.


Repository:
  rL LLVM

https://reviews.llvm.org/D62198

Files:
  lib/Transforms/Scalar/StructurizeCFG.cpp
  test/CodeGen/AMDGPU/control-flow-optnone.ll
  test/Transforms/StructurizeCFG/AMDGPU/uniform-regions.ll

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