[PATCH] D112435: [GlobalISel] Add G_BFI (bitfield insertion opcode)

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/CodeGen/MachineVerifier.cpp:1616
+    LLT DstTy = MRI->getType(MI->getOperand(0).getReg());
+    if (DstTy.isVector()) {
+      report("Bitfield insertion is not supported on vectors", MI);
----------------
arsenm wrote:
> paquette wrote:
> > Maybe add a FIXME or TODO here noting that it may make sense to extend this to vectors in the future? (I can't think of any use-cases, but maybe it makes sense on some target...)
> Supporting on vectors is good for consistency and also can help with combine ordering problems
I don't think this should disallow vectors. Having the legalizer scalarize is trivial

I think it's a better question if the second/third operands can be vectors or not


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  https://reviews.llvm.org/D112435/new/

https://reviews.llvm.org/D112435