[PATCH] D133491: [AArch64] Try to fold shuffle (tbl2, tbl2) to tbl4.

[Tim Northover via Phabricator via llvm-commits]

t.p.northover added inline comments.


================
Comment at: llvm/lib/Target/AArch64/AArch64ISelLowering.cpp:10734
+      return false;
+    for (unsigned I = 0; I < 8; I++) {
+      if (!isa<ConstantSDNode>(Mask->getOperand(I)))
----------------
Would also need to extend this check. Or perhaps better only check the indices that are actually used by the shuffle, so move this into the main loop later.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D133491/new/

https://reviews.llvm.org/D133491