[all-commits] [llvm/llvm-project] 126016: [InstCombine] Simplify nonnull pointers (#128111)

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 126016b6620e1e64e1685e06f4c6bb1e5a2508ed
      https://github.com/llvm/llvm-project/commit/126016b6620e1e64e1685e06f4c6bb1e5a2508ed
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2025-02-22 (Sat, 22 Feb 2025)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineInternal.h
    M llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/nonnull-select.ll
    M llvm/test/Transforms/PhaseOrdering/load-store-sameval.ll
    A llvm/test/Transforms/PhaseOrdering/memset-combine.ll

  Log Message:
  -----------
  [InstCombine] Simplify nonnull pointers (#128111)

This patch is the follow-up of
https://github.com/llvm/llvm-project/pull/127979. It introduces a helper
`simplifyNonNullOperand` to avoid duplicate logic. It also addresses the
one-use issue in `visitLoadInst`, as discussed in
https://github.com/llvm/llvm-project/pull/127979#issuecomment-2671013972.
The `nonnull` attribute is also supported. Proof:
https://alive2.llvm.org/ce/z/MCKgT9



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