en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/clang/test/PCH/chain-conversion-lookup.cpp#3b65ed0a Change the hashing function for DeclContext lookup within an AST fileby eliminating the type ID from constructor, destructor, andconversion function names. There are several reasons for this change: - A given type (say, int*) isn't guaranteed to have a single, unique type ID within a chain of PCH files. Hence, we could end up hashing based on the wrong type ID, causing name lookup to fail. - The mapping from types back to type IDs required one DenseMap entry for every type that was ever deserialized, which was an unacceptable cost to support just the name lookup of constructors, destructors, and conversion functions. Plus, this mapping could never actually work with chained or multiple PCH, based on the first bullet.Once we have eliminated the type from the hash function, theseproblems go away, as does my horrible "reverse type remap" hack, whichwas doomed from the start (see bullet #1 above) and far toocomplicated. However, note that removing the type from the hash function means thatall constructors, destructors, and conversion functions have the samehash key, so I've updated the caller to double-check that thedeclarations found have the appropriate name.llvm-svn: 136708 List of files: /llvm-project-15.0.7/clang/test/PCH/chain-conversion-lookup.cpp Tue, 02 Aug 2011 18:32:54 +0000 Douglas Gregor <dgregor@apple.com>