[PATCH] D148248: [AArch64][SVE] Generate smull/umull instead of sve v2i64 mul

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
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A neon smull/umull should be preferred over a sve v2i64 mul with two extends.  It will be both less instructions and a lower cost multiply instruction.


https://reviews.llvm.org/D148248

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/sve-mull.ll

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