[all-commits] [llvm/llvm-project] 5ad495: [clang] Unique NamespaceAndPrefixStorages with a U...

[Kazu Hirata via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5ad4959a040a6e31eba7ab46f3bf4fd41cd224dc
      https://github.com/llvm/llvm-project/commit/5ad4959a040a6e31eba7ab46f3bf4fd41cd224dc
  Author: Kazu Hirata <kazu at google.com>
  Date:   2026-09-27 (Sun, 27 Sep 2026)

  Changed paths:
    M clang/include/clang/AST/ASTContext.h
    M clang/include/clang/AST/NestedNameSpecifierBase.h
    M clang/lib/AST/NestedNameSpecifier.cpp

  Log Message:
  -----------
  [clang] Unique NamespaceAndPrefixStorages with a UniquingSet (NFC) (#224221)

This patch migrates NamespaceAndPrefixStorages in ASTContext from
llvm::FoldingSet to llvm::UniquingSet.

NamespaceAndPrefixStorage keys on a pair of const NamespaceBaseDecl *
and NestedNameSpecifier.  Switching to UniquingSet allows us to look
up storages with a typed key, eliminating FoldingSetNodeID
serialization at lookup sites and removing
NamespaceAndPrefixStorage::Profile.

Assisted-by: Antigravity



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