[all-commits] [llvm/llvm-project] 4098e2: [ADT] Modernize SparseSet to use llvm::identity_cx...

[Kazu Hirata via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4098e263ff77122f321562c7e66b2da96f03f604
      https://github.com/llvm/llvm-project/commit/4098e263ff77122f321562c7e66b2da96f03f604
  Author: Kazu Hirata <kazu at google.com>
  Date:   2025-10-21 (Tue, 21 Oct 2025)

  Changed paths:
    M llvm/include/llvm/ADT/SparseSet.h
    M llvm/include/llvm/CodeGen/LivePhysRegs.h
    M llvm/include/llvm/CodeGen/RegisterPressure.h
    M llvm/lib/CodeGen/IfConversion.cpp
    M llvm/lib/CodeGen/RegAllocFast.cpp

  Log Message:
  -----------
  [ADT] Modernize SparseSet to use llvm::identity_cxx20 (NFC) (#164362)

The legacy llvm::identity is not quite the same as std::identity from
C++20.  llvm::identity is a template struct with an ::argument_type
member.  In contrast, llvm::identity_cxx20 (and std::identity) is a
non-template struct with a templated call operator and no
::argument_type.

This patch modernizes llvm::SparseSet by updating its default
key-extraction functor to llvm::identity_cxx20.  A new template
parameter KeyT takes over the role of ::argument_type.

Existing uses of SparseSet are updated for the new template signature.
Most use sites are of the form SparseSet<T>, requiring no update.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications