[PATCH] D77453: [GlobalISel] Simplify G_ADD when it has (0-X) on the LHS or RHS

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp:1634
+  std::tie(SubLHS, SubRHS) = MatchInfo;
+  Builder.buildSub(MI.getOperand(0).getReg(), SubLHS, SubRHS);
+  MI.eraseFromParent();
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Should this preserve any flags?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77453/new/

https://reviews.llvm.org/D77453