[llvm] [AMDGPU] Update hasUnwantedEffectsWhenEXECEmpty (PR #97982)

[Matt Arsenault via llvm-commits]

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@@ -936,6 +936,14 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
            Opcode == AMDGPU::S_BARRIER_SIGNAL_ISFIRST_IMM;
   }
 
+  bool isBarrierRelated(unsigned Opcode) const {
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arsenm wrote:

Name could be better. Not sure what "barrier related" means, or why DS_GWS_BARRIER doesn't count as a barrier 

https://github.com/llvm/llvm-project/pull/97982