[all-commits] [llvm/llvm-project] 4830d4: [MachineCombiner][NFC] Add MustReduceRegisterPress...

[Chen Zheng via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4830d458dd0d133354cbe1a616e38dfda8e096b8
      https://github.com/llvm/llvm-project/commit/4830d458dd0d133354cbe1a616e38dfda8e096b8
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2020-12-14 (Mon, 14 Dec 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetInstrInfo.h
    M llvm/lib/CodeGen/MachineCombiner.cpp
    M llvm/lib/CodeGen/TargetInstrInfo.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.h
    M llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
    M llvm/lib/Target/PowerPC/PPCInstrInfo.h

  Log Message:
  -----------
  [MachineCombiner][NFC] Add MustReduceRegisterPressure goal

add a new goal MustReduceRegisterPressure for machine combiner pass.

PowerPC will use this new goal to do some register pressure related optimization.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D92068