[PATCH] D156679: [WIP][AMDGPU][SIInsertWaitcnts] Do not add s_waitcnt when the counters are known to be 0 already

[Juan Manuel Martinez Caamaño via Phabricator via llvm-commits]

jmmartinez added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp:915
+      AMDGPU::Waitcnt OldWait = AMDGPU::decodeWaitcnt(IV, IEnc);
+      ScoreBrackets.simplifyWaitcnt(OldWait);
+      Wait = Wait.combined(OldWait);
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Only simplify the wait for soft waitcnt, otherwise this may relax a hard waitcnt.


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  https://reviews.llvm.org/D156679/new/

https://reviews.llvm.org/D156679