[all-commits] [llvm/llvm-project] 311907: [RISCV][test] Add new tests for add-mul optimizati...

[Ben Shi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 31190738c024298745d877a47ef95a5263ea5c9e
      https://github.com/llvm/llvm-project/commit/31190738c024298745d877a47ef95a5263ea5c9e
  Author: Ben Shi <powerman1st at 163.com>
  Date:   2021-06-19 (Sat, 19 Jun 2021)

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

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

These tests will show the following optimization by future patches.

Rx + Ry * 18  => (SH1ADD (SH3ADD Rx, Rx), Ry)
Rx + Ry * 20  => (SH2ADD (SH2ADD Rx, Rx), Ry)
Rx + Ry * 24  => (SH3ADD (SH1ADD Rx, Rx), Ry)
Rx + Ry * 36  => (SH2ADD (SH3ADD Rx, Rx), Ry)
Rx + Ry * 40  => (SH3ADD (SH2ADD Rx, Rx), Ry)
Rx + Ry * 72  => (SH3ADD (SH3ADD Rx, Rx), Ry)
Rx * (3 << C) => (SLLI (SH1ADD Rx, Rx), C)
Rx * (5 << C) => (SLLI (SH2ADD Rx, Rx), C)
Rx * (9 << C) => (SLLI (SH3ADD Rx, Rx), C)

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D104507