[all-commits] [llvm/llvm-project] 1e9d08: [RISCV] optimize addition with a pair of (addi imm)

[Ben Shi via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1e9d0811c9bf40abbe07d591057869568f140036
      https://github.com/llvm/llvm-project/commit/1e9d0811c9bf40abbe07d591057869568f140036
  Author: Ben Shi <powerman1st at 163.com>
  Date:   2020-07-07 (Tue, 07 Jul 2020)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    A llvm/test/CodeGen/RISCV/add-imm.ll

  Log Message:
  -----------
  [RISCV] optimize addition with a pair of (addi imm)

For an addition with an immediate in specific ranges, a pair of
addi-addi can be generated instead of the ordinary lui-addi-add serial.

Reviewed By: MaskRay, luismarques

Differential Revision: https://reviews.llvm.org/D82262