[PATCH] D40547: AMDGPU: Fix copying i1 value out of loop with non-uniform exit

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: lib/Target/AMDGPU/Utils/AMDGPULaneDominator.cpp:13-15
+// 2. whenever B executes, every active lane during that execution of B was
+//    also active during the most recent execution of A.
+//
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Are you really trying to find control flow equivalent regions? Or is this a active lanes are a subset?


https://reviews.llvm.org/D40547