[PATCH] D146198: [RISCV] Make ResourceCycles relevant to LMUL

[Michael Maitland via Phabricator via llvm-commits]

michaelmaitland added a comment.

One concern I have is that a microarchitecture may wish to have more flexibility over the number of resource cycles for each LMUL than the `multiplier` subroutine allows for. I am imagining a scenario where the number of resource cycles for different LMUL is more complex than multiplication by the LMUL factor. Something like this would allow for maximum flexibility:

  for mx in MxList {
    defvar RC = ...; // Something that may be more complex than BaseCycles * multiplier
    defvar L = ...; // Maybe latency is still relevant, even if it is less important than ResourceCycles
    let ResourceCycles = [RC], Latency = L in {
      ...
    }
  }


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https://reviews.llvm.org/D146198