[PATCH] D130698: [AArch64][DAGCombine] Add performBuildVectorCombine 'extract_elt ~> anyext'

[Paul Walker via Phabricator via llvm-commits]

paulwalker-arm accepted this revision.
paulwalker-arm added inline comments.
This revision is now accepted and ready to land.


================
Comment at: llvm/lib/Target/AArch64/AArch64ISelLowering.cpp:16070
+    return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i32, Ext,
+                       SubvectorIdx);
+  }
----------------
`EXTRACT_SUBVECTOR` has more stringent requires for it's index operand than `EXTRACT_VECTOR_ELEMENT` so you'll be better reconstructing it via `getVectorIdxConstant`.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D130698/new/

https://reviews.llvm.org/D130698