The major change here is to index macro occurrences in more places than
before, specifically
* In non-expansion references such as `#if`, `#ifdef`, etc.
* When the macro is a reference to a builtin macro such as __LINE__.
* When using the preprocessor state instead of callbacks, we now include
all definition locations and undefinitions instead of just the latest
one (which may also have had the wrong location previously).
* When indexing an existing module file (.pcm), we now include module
macros, and we no longer report unrelated preprocessor macros during
indexing the module, which could have caused duplication.
Additionally, we now correctly obey the system symbol filter for macros,
so by default in system headers only definition/undefinition occurrences
are reported, but it can be configured to report references as well if
desired.
Extends FileIndexRecord to support occurrences of macros. Since the
design of this type is to keep a single list of entities organized by
source location, we incorporate macros into the existing DeclOccurrence
struct.
Differential Revision: https://reviews.llvm.org/D99758
* Create a USR for the occurrences of the 'module' symbol kind
* Record module references for each identifier in an import declaration
llvm-svn: 342484
Whether we call an ImportDecl a decl or a reference symbol role is
somewhat academic, but in practice it's more like a declaration because
it is interesting even to consumers who wouldn't care about references.
Most importantly, we want to report the module dependencies of system
modules even when we have declaration-only filtering.
rdar://problem/27134855
llvm-svn: 275454
Ben Langmuir