llvm-project/clang/test/PCH/reinclude1.h

namespace A {
  int x;
  int y;
}

int foo;
#define foo foo
Fix an issue with writing to PCH another included PCH, introduced by the "using an AST on-disk hash table for name lookup" commit. When including a PCH and later re-emitting to another PCH, the name lookup tables of DeclContexts may be incomplete, since we now lazily deserialize the visible decls of a particular name. Fix the issue by iterating over the un-deserialized visible decls and completing the lookup tables of DeclContexts before writing them out. llvm-svn: 111698 2010-08-21 07:35:55 +08:00			`namespace A {`
			`int x;`
			`int y;`
			`}`
Implement AST/PCH chaining support for macro definitions. Previously, we would deserialize all of the macro definitions we knew about while serializing the macro definitions at the end of the AST/PCH file. Even though we skipped most of them (since they were unchanged), it's still a performance problem. Now, we do the standard AST/PCH chaining trick: watch what identifiers are deserialized as macro names, and consider only those identifiers (along with macro definitions that have been deserialized/written in the source) when serializing the preprocessor state. llvm-svn: 125324 2011-02-11 08:26:14 +08:00
			`int foo;`
			`#define foo foo`