[PATCH] D88060: [GISel]: Few InsertVecElt combines

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp:2453
+      return *UndefReg;
+    Builder.setInstr(MI);
+    UndefReg = Builder.buildUndef(DstTy.getScalarType()).getReg(0);
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aditya_nandakumar wrote:
> arsenm wrote:
> > I don't think you need to reset the insert point here
> I'm not resetting. I'm making sure it's set correctly (MI) so I can insert IMPLICIT_DEFs.
Oh, actually this is modifying the MIR in the match function which seems like a problem. Can you defer this to apply?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D88060/new/

https://reviews.llvm.org/D88060