[all-commits] [llvm/llvm-project] 5797fe: [RISCV] Reorder checks in RISCVTTIImpl::getGatherS...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5797feaa55bceda38ed797de7ad90ecd6d2ee222
      https://github.com/llvm/llvm-project/commit/5797feaa55bceda38ed797de7ad90ecd6d2ee222
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-03-25 (Thu, 25 Mar 2021)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/RISCV/fixed-vector-gather.ll
    M llvm/test/Analysis/CostModel/RISCV/fixed-vector-scatter.ll

  Log Message:
  -----------
  [RISCV] Reorder checks in RISCVTTIImpl::getGatherScatterOpCost to avoid calling getMinRVVVectorSizeInBits() when V extension is not enabled.

getMinRVVVectorSizeInBits() asserts if the V extension isn't
enabled. So check that gather/scatter is legal first since it
already contains a check for V extension being enabled. It
also already checks getMinRVVVectorSizeInBits for fixed length
vectors so we don't need a check in getGatherScatterOpCost.