[Index] Add an option to collect macros from preprocesor.

Summary: Also added unit tests for the index library; lit+c-index-test is painful...

Reviewers: ilya-biryukov

Reviewed By: ilya-biryukov

Subscribers: mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D52098

llvm-svn: 342451

1 files changed, 22 insertions, 1 deletions

diff --git a/clang/lib/Index/IndexingAction.cpp b/clang/lib/Index/IndexingAction.cpp
index 16f6c21745e..cb5c951f38a 100644
--- a/clang/lib/Index/IndexingAction.cpp
+++ b/clang/lib/Index/IndexingAction.cpp
@@ -215,23 +215,41 @@ static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IndexCtx) {
   Unit.visitLocalTopLevelDecls(&IndexCtx, topLevelDeclVisitor);
 }
 
+static void indexPreprocessorMacros(const Preprocessor &PP,
+                                    IndexDataConsumer &DataConsumer) {
+  for (const auto &M : PP.macros())
+    if (MacroDirective *MD = M.second.getLatest())
+      DataConsumer.handleMacroOccurence(
+          M.first, MD->getMacroInfo(),
+          static_cast<unsigned>(index::SymbolRole::Definition),
+          MD->getLocation());
+}
+
 void index::indexASTUnit(ASTUnit &Unit, IndexDataConsumer &DataConsumer,
                          IndexingOptions Opts) {
   IndexingContext IndexCtx(Opts, DataConsumer);
   IndexCtx.setASTContext(Unit.getASTContext());
   DataConsumer.initialize(Unit.getASTContext());
   DataConsumer.setPreprocessor(Unit.getPreprocessorPtr());
+
+  if (Opts.IndexMacrosInPreprocessor)
+    indexPreprocessorMacros(Unit.getPreprocessor(), DataConsumer);
   indexTranslationUnit(Unit, IndexCtx);
   DataConsumer.finish();
 }
 
-void index::indexTopLevelDecls(ASTContext &Ctx, ArrayRef<const Decl *> Decls,
+void index::indexTopLevelDecls(ASTContext &Ctx, Preprocessor &PP,
+                               ArrayRef<const Decl *> Decls,
                                IndexDataConsumer &DataConsumer,
                                IndexingOptions Opts) {
   IndexingContext IndexCtx(Opts, DataConsumer);
   IndexCtx.setASTContext(Ctx);
 
   DataConsumer.initialize(Ctx);
+
+  if (Opts.IndexMacrosInPreprocessor)
+    indexPreprocessorMacros(PP, DataConsumer);
+
   for (const Decl *D : Decls)
     IndexCtx.indexTopLevelDecl(D);
   DataConsumer.finish();
@@ -251,6 +269,9 @@ void index::indexModuleFile(serialization::ModuleFile &Mod, ASTReader &Reader,
   IndexCtx.setASTContext(Ctx);
   DataConsumer.initialize(Ctx);
 
+  if (Opts.IndexMacrosInPreprocessor)
+    indexPreprocessorMacros(Reader.getPreprocessor(), DataConsumer);
+
   for (const Decl *D : Reader.getModuleFileLevelDecls(Mod)) {
     IndexCtx.indexTopLevelDecl(D);
   }