[PATCH] D65051: [ARM] MVE integer compares and selects

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: t.p.northover, SjoerdMeijer, samparker, simon_tatham, ostannard.
Herald added subscribers: hiraditya, kristof.beyls, javed.absar.
Herald added a project: LLVM.

This adds the very basics for MVE vector predication, adding integer VCMP and VSEL instruction support. This is done through predicate registers (MVT::v16i1, MVT::v8i1, MVT::v4i1), but otherwise using same mechanics as NEON to custom lower setcc's through ARMISD::VCXX nodes (VCEQ, VCGT, VCEQZ, etc). An extra VCNE was added, as this can be handled sensibly by MVE's expanded number of VCMP condition codes. (There are also VCLE and VCLT which are added later). VPSEL is also added here, simply selecting on the vselect.

Original code by David Sherwood.


https://reviews.llvm.org/D65051

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMISelLowering.h
  llvm/lib/Target/ARM/ARMInstrInfo.td
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/lib/Target/ARM/ARMInstrNEON.td
  llvm/test/CodeGen/Thumb2/mve-vcmp.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpz.ll
  llvm/test/CodeGen/Thumb2/mve-vpsel.ll

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