[all-commits] [llvm/llvm-project] 3bdf45: [NFC] [TargetRegisterInfo] add one use check to lo...

[Chen Zheng via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 3bdf4507b66348ad78df4655a8e4f36c3fc10f3c
      https://github.com/llvm/llvm-project/commit/3bdf4507b66348ad78df4655a8e4f36c3fc10f3c
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2021-01-17 (Sun, 17 Jan 2021)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetRegisterInfo.h
    M llvm/lib/CodeGen/TargetRegisterInfo.cpp

  Log Message:
  -----------
  [NFC] [TargetRegisterInfo] add one use check to lookThruCopyLike.

add one use check to lookThruCopyLike.

The root node is safe to be deleted if we are sure that every
definition in the copy chain only has one use.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D92069