[PATCH] D109858: [GlobalISel][AMDGPU] Add a -final-dce-legalizer flag to clean up dead code after legalization.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/CodeGen/GlobalISel/Legalizer.cpp:50-53
+static cl::opt<bool> RunDCE(
+    "final-dce-legalizer",
+    cl::desc("Run a final DCE pass after all legalization is completed."),
+    cl::Optional, cl::init(false));
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Why do these instructions not get deleted as-is? I think this is a very un-discoverable option and if it's worth deleting these instructions, it's worth just always doing it


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D109858/new/

https://reviews.llvm.org/D109858