[all-commits] [llvm/llvm-project] e47108: [InstCombine] Use disjoint flag in add of or fold

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e4710872e98a931c6d5e89bc965b778746ead2c0
      https://github.com/llvm/llvm-project/commit/e4710872e98a931c6d5e89bc965b778746ead2c0
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-12-05 (Tue, 05 Dec 2023)

  Changed paths:
    M llvm/include/llvm/IR/PatternMatch.h
    M llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
    M llvm/test/Transforms/InstCombine/add.ll

  Log Message:
  -----------
  [InstCombine] Use disjoint flag in add of or fold

Use disjoint instead of haveNoCommonBitsSet(), which is slightly
stronger in case the information used to infer disjoint has been
lost.

Introduce the m_DisjointOr() matcher to make handling cases like
this cleaner.