[all-commits] [llvm/llvm-project] 0e6f0b: [RISCV] Add cost model for fixed broadcast shuffle

[Shih-Po Hung via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0e6f0b7cc38391f3365a862266a8aef50d093135
      https://github.com/llvm/llvm-project/commit/0e6f0b7cc38391f3365a862266a8aef50d093135
  Author: ShihPo Hung <shihpo.hung at sifive.com>
  Date:   2022-11-30 (Wed, 30 Nov 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
    A llvm/test/Analysis/CostModel/RISCV/fixed-shuffle-broadcast.ll

  Log Message:
  -----------
   [RISCV] Add cost model for fixed broadcast shuffle

This patch adds basic broadcast shuffle costs in order to enable SLP vectorization.
And adds `getLMULCost` to consider reciprocal throughput for different LMUL.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D137276