[all-commits] [llvm/llvm-project] c67653: [RISCV] Support vXf16 vector_shuffle with Zvfhmin....

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c67653fbc3dd4ea9ab2a32c481a9ac4411020c7b
      https://github.com/llvm/llvm-project/commit/c67653fbc3dd4ea9ab2a32c481a9ac4411020c7b
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-07-03 (Wed, 03 Jul 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-shuffles.ll

  Log Message:
  -----------
  [RISCV] Support vXf16 vector_shuffle with Zvfhmin. (#97491)

We can shuffle vXf16 vectors just like vXi16 vectors. We don't need any
FP instructions. Update the predicates for vrgather and vslides patterns
to only check the predicates based on the equivalent integer type. If we
use the FP type it will check Zvfh and block Zvfhmin.

These are probably not the only patterns that need to be fixed, but the
test from the bug report no longer crashes.

Fixes #97477



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