[PATCH] D74128: AMDGPU/GlobalISel: Fully handle 0 dmask case during legalize

[Vitaly Buka via Phabricator via llvm-commits]

vitalybuka added inline comments.


================
Comment at: llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp:3190
+      B.buildUndef(MI.getOperand(0));
+      MI.eraseFromParent();
+      return true;
----------------
I guess eraseFromParent conflicts with
```
auto ChangedInstr = make_scope_exit([&] { Observer.changedInstr(MI); });
```


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  https://reviews.llvm.org/D74128/new/

https://reviews.llvm.org/D74128