[PATCH] D136015: [InstCombine] Fold series of instructions into mull

[Allen zhong via Phabricator via llvm-commits]

Allen updated this revision to Diff 469121.
Allen marked 2 inline comments as done.
Allen added a comment.

1、 use BinaryOperator::CreateMul() to avoid the use of replaceInstUsesWith()
2、 Add 3 more cases according comment
3、 Use m_CombineOr to  match that with minimal code
4、create a static function above InstCombinerImpl::visitAdd()


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136015/new/

https://reviews.llvm.org/D136015

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
  llvm/test/Transforms/InstCombine/mul.ll

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