[PATCH] D76598: [GlobalISel] support narrow G_IMPLICIT_DEF for DstSize % NarrowSize != 0

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

I added some test cases in db3f3f0240bb3a6c6e75a547ab7c6efeca4a81ee <https://reviews.llvm.org/rGdb3f3f0240bb3a6c6e75a547ab7c6efeca4a81ee> that this should impact, can you rebase on top of that?



================
Comment at: llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp:742-743
+      Register AnyExtReg = DstReg;
+      if (DstTy.isVector())
+        AnyExtReg = MRI.createGenericVirtualRegister(LLT::scalar(SizeOp0));
+
----------------
I don't think casting the vector type to a scalar makes sense, and this should introduce a vector anyext


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76598/new/

https://reviews.llvm.org/D76598