[PATCH] D109154: [GlobalISel] Improve elimination of dead instructions in legalizer

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp:2827-2828
     UseMI->eraseFromParent();
+    if (isTriviallyDead(*Cst, MRI))
+      Cst->eraseFromParent();
 
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Why does custom legalization need special casing? Why doesn't the observer get these too?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D109154/new/

https://reviews.llvm.org/D109154