[PATCH] D79193: [AArch64][SVE] Implement lowering for SIGN_EXTEND etc. of SVE predicates.

[Eli Friedman via Phabricator via llvm-commits]

efriedma created this revision.
efriedma added reviewers: sdesmalen, ctetreau, huihuiz, c-rhodes, kmclaughlin, fpetrogalli, cameron.mcinally.
Herald added subscribers: danielkiss, psnobl, rkruppe, hiraditya, kristof.beyls, tschuett.
Herald added a project: LLVM.

Just convert SIGN_EXTEND to VSELECT, which generates the obvious lowering.

Also, while I'm here, fix the return type of SETCC so we don't try to merge a sign-extend with a SETCC.

The lowering here could be improved a lot; we're missing a lot of patterns for VSELECT of constants.  But that's basically orthogonal.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D79193

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/test/CodeGen/AArch64/sve-fcmp.ll
  llvm/test/CodeGen/AArch64/sve-sext-zext.ll

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