[all-commits] [llvm/llvm-project] f0ba1a: [PowerPC] folding rlwinm + rlwinm to rlwinm

[chen zheng via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f0ba1aec35d599353b6c5eca8286791b1c410b7c
      https://github.com/llvm/llvm-project/commit/f0ba1aec35d599353b6c5eca8286791b1c410b7c
  Author: czhengsz <czhengsz at cn.ibm.com>
  Date:   2019-12-03 (Tue, 03 Dec 2019)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCMIPeephole.cpp
    M llvm/test/CodeGen/PowerPC/fold-rlwinm-1.ll
    A llvm/test/CodeGen/PowerPC/fold-rlwinm.mir

  Log Message:
  -----------
  [PowerPC] folding rlwinm + rlwinm to rlwinm

  For example:
    x3 = rlwinm x3, 27, 5, 31
    x3 = rlwinm x3, 19, 0, 12
  can be combined to
    x3 = rlwinm x3, 14, 0, 12

Reviewed by: steven.zhang, lkail

Differential Revision: https://reviews.llvm.org/D70374