[all-commits] [llvm/llvm-project] 7949a2: [InstCombine] enhance icmp with sub folds

[Allen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7949a2a802f0791eaf7c6ecbdd6ed5daa2a278cf
      https://github.com/llvm/llvm-project/commit/7949a2a802f0791eaf7c6ecbdd6ed5daa2a278cf
  Author: Zhongyunde <zhongyunde at huawei.com>
  Date:   2023-03-22 (Wed, 22 Mar 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
    M llvm/test/Transforms/InstCombine/icmp-sub.ll

  Log Message:
  -----------
  [InstCombine] enhance icmp with sub folds

The new IR with And removes a use of the input variable, which is better for analysis.
Fix https://github.com/llvm/llvm-project/issues/60818

Reviewed By: nikic, spatel

Differential Revision: https://reviews.llvm.org/D145846