[PATCH] D109348: [X86][AVX] Prohibit creating X86ISD::VBROADCAST(128->256) when it is AVX in combineConcatVectorOps
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Sep 7 02:33:00 PDT 2021
RKSimon added inline comments.
================
Comment at: llvm/lib/Target/X86/X86ISelLowering.cpp:50997
+ // Before AVX2, we don't have vbroadcast instruction(128->256), we prohibit
+ // creating such vbroadcast.
+ if (Op0.getOpcode() == X86ISD::VBROADCAST &&
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Why not add isel patterns to handle 128 ->256 like we do for scalar broadcasts?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D109348/new/
https://reviews.llvm.org/D109348
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