[PATCH] D145846: [InstCombine] enhance icmp with sub folds

[Allen zhong via Phabricator via llvm-commits]

Allen updated this revision to Diff 506465.
Allen added a comment.

address commet
1、Add more cases (also update on D146268 <https://reviews.llvm.org/D146268>)
2、update with getScalarSizeInBits and add related vector case
3、use ICmpInst::isEquality(Pred) to replace Pred == ICmpInst::ICMP_EQ
4、I.getPredicate() --> Pred


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145846/new/

https://reviews.llvm.org/D145846

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/test/Transforms/InstCombine/icmp-sub.ll

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