[PATCH] D40547: AMDGPU: Fix copying i1 value out of loop with non-uniform exit
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Nov 28 20:00:54 PST 2017
arsenm added inline comments.
================
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
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