[PATCH] D98888: [AMDGPU] SIOptimizeExecMaskingPreRA should check constant bus constraint when folds EXEC copy

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

Needs test.



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Comment at: llvm/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp:421
+        MachineInstr *SingleExecUser = &*MRI->use_instr_nodbg_begin(SavedExec);
+        int idx = SingleExecUser->findRegisterUseOperandIdx(SavedExec);
+        assert(idx != -1);
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This could be an implicit use by VALU, which shall be ignored then.


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https://reviews.llvm.org/D98888