[PATCH] D86609: [AMDGPU][GlobalISel] Eliminate barrier if workgroup size is not greater than wavefront size

[Matt Arsenault via Phabricator via llvm-commits]

arsenm accepted this revision.
arsenm added a comment.
This revision is now accepted and ready to land.

This could be a pattern predicate but I guess it's not important



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Comment at: llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp:1426
+bool AMDGPUInstructionSelector::selectSBarrier(MachineInstr &MI) const {
+  if (TM.getOptLevel() > CodeGenOpt::None) {
+    unsigned WGSize = STI.getFlatWorkGroupSizes(MF->getFunction()).second;
----------------
There's no real reason to check the opt level but I guess it does this already


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  https://reviews.llvm.org/D86609/new/

https://reviews.llvm.org/D86609