[PATCH] D101839: [RISCV] Cap legal fixed-length vectors 256-element types

[Fraser Cormack via Phabricator via llvm-commits]

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Previously, RISC-V would make legal all fixed-length vectors types whose
size are less than or equal to some function of the minimum value of
VLEN and the maximum-permissible LMUL grouping.

Due to vector legalization issues, this patch instead caps the legal
fixed-length vector types to those with 256 elements. This value was
chosen because it is the longest vector length which has corresponding
MVTs across all supported element types.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101839

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/interleave-crash.ll

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