[all-commits] [llvm/llvm-project] 26a396: [PowerPC] support register pressure reduction in m...

[Chen Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 26a396c4ef481cb159bba631982841736a125a9c
      https://github.com/llvm/llvm-project/commit/26a396c4ef481cb159bba631982841736a125a9c
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2021-01-17 (Sun, 17 Jan 2021)

  Changed paths:
    M llvm/include/llvm/CodeGen/MachineCombinerPattern.h
    M llvm/lib/CodeGen/MachineCombiner.cpp
    M llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
    M llvm/lib/Target/PowerPC/PPCInstrInfo.h
    A llvm/test/CodeGen/PowerPC/register-pressure-reduction.ll

  Log Message:
  -----------
  [PowerPC] support register pressure reduction in machine combiner.

Reassociating some patterns to generate more fma instructions to
reduce register pressure.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D92071