[all-commits] [llvm/llvm-project] d3738a: [RISCV][test] Add tests for mul optimization in th...

[Ben Shi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d3738a09fb2587f584cec5faefda1f37743524a5
      https://github.com/llvm/llvm-project/commit/d3738a09fb2587f584cec5faefda1f37743524a5
  Author: Ben Shi <powerman1st at 163.com>
  Date:   2021-07-21 (Wed, 21 Jul 2021)

  Changed paths:
    M llvm/test/CodeGen/RISCV/rv32zba.ll
    M llvm/test/CodeGen/RISCV/rv64zba.ll

  Log Message:
  -----------
  [RISCV][test] Add tests for mul optimization in the zba extension with SH*ADD

These tests will show the following optimization by future patches.

(mul x, 11) -> (SH1ADD (SH2ADD x, x), x)
(mul x, 19) -> (SH1ADD (SH3ADD x, x), x)
(mul x, 13) -> (SH2ADD (SH1ADD x, x), x)
(mul x, 21) -> (SH2ADD (SH2ADD x, x), x)
(mul x, 37) -> (SH2ADD (SH3ADD x, x), x)
(mul x, 25) -> (SH3ADD (SH1ADD x, x), x)
(mul x, 41) -> (SH3ADD (SH2ADD x, x), x)
(mul x, 73) -> (SH3ADD (SH3ADD x, x), x)

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D106031