[PATCH] D117379: [RISCV] When expanding CONCAT_VECTORS, don't create INSERT_SUBVECTORS for undef subvectors.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: frasercrmck, rogfer01.
Herald added subscribers: VincentWu, luke957, achieveartificialintelligence, vkmr, evandro, luismarques, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, edward-jones, zzheng, jrtc27, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya.
craig.topper requested review of this revision.
Herald added a subscriber: MaskRay.
Herald added a project: LLVM.

For fixed vectors, the undef will get expanded to an all zeros
build_vector. We don't want that so suppress creating the
insert_subvector.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D117379

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/common-shuffle-patterns.ll
  llvm/test/CodeGen/RISCV/rvv/extract-subvector.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll
  llvm/test/CodeGen/RISCV/rvv/interleave-crash.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D117379.400223.patch
Type: text/x-patch
Size: 15146 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20220115/041a7d5a/attachment.bin>