[PATCH] D124287: [modules][ODRHash] Compare ODR hashes to detect mismatches in duplicate ObjCInterfaceDecl.

[Volodymyr Sapsai via Phabricator via cfe-commits]

vsapsai created this revision.
vsapsai added reviewers: jansvoboda11, rsmith, bruno.
Herald added a subscriber: ributzka.
Herald added a project: All.
vsapsai requested review of this revision.
Herald added a project: clang.

The purpose of the change is to start using ODR hash for comparison
instead of ASTStructuralEquivalence and ODR hash calculation is,
unfortunately, incomplete. The decision to use ODR hash is made because
we can use the same mechanism while checking duplicates encountered
during deserialization. For that case ASTStructuralEquivalence is not a
good fit because it can lead to excessive deserialization and
deserialized decls would be used only for ASTStructuralEquivalence.

rdar://82908223


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124287

Files:
  clang/include/clang/AST/DeclObjC.h
  clang/include/clang/AST/ODRHash.h
  clang/include/clang/Sema/Sema.h
  clang/lib/AST/DeclObjC.cpp
  clang/lib/AST/ODRHash.cpp
  clang/lib/Parse/ParseObjc.cpp
  clang/test/Modules/compare-objc-interface.m

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