bool AnalysisConsumer::HandleTopLevelDecl(DeclGroupRef DG) {
storeTopLevelDecls(DG);
for (DeclGroupRef::iterator i = DG.begin(), e = DG.end(); i != e; i++) {
Decl *D = *i;
string ssStart = D->getLocStart().printToString(Mgr->getASTContext().getSourceManager());
//std::cout<<"HandleTopLevelDecl: "<<ssStart<<std::endl;
}
return true;
}
static CXString getDeclCursorUSR(const CXCursor &C) {
Decl *D = cxcursor::getCursorDecl(C);
// Don't generate USRs for things with invalid locations.
if (!D || D->getLocStart().isInvalid())
return createCXString("");
// Check if the cursor has 'NoLinkage'.
if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
switch (ND->getLinkage()) {
case ExternalLinkage:
// Generate USRs for all entities with external linkage.
break;
case NoLinkage:
case UniqueExternalLinkage:
// We allow enums, typedefs, and structs that have no linkage to
// have USRs that are anchored to the file they were defined in
// (e.g., the header). This is a little gross, but in principal
// enums/anonymous structs/etc. defined in a common header file
// are referred to across multiple translation units.
if (isa<TagDecl>(ND) || isa<TypedefDecl>(ND) ||
isa<EnumConstantDecl>(ND) || isa<FieldDecl>(ND) ||
isa<VarDecl>(ND) || isa<NamespaceDecl>(ND))
break;
// Fall-through.
case InternalLinkage:
if (isa<FunctionDecl>(ND))
break;
}
CXTranslationUnit TU = cxcursor::getCursorTU(C);
if (!TU)
return createCXString("");
CXStringBuf *buf = cxstring::getCXStringBuf(TU);
if (!buf)
return createCXString("");
{
USRGenerator UG(&C, &buf->Data);
UG->Visit(D);
if (UG->ignoreResults()) {
disposeCXStringBuf(buf);
return createCXString("");
}
}
// Return the C-string, but don't make a copy since it is already in
// the string buffer.
buf->Data.push_back('\0');
return createCXString(buf);
}
void AnalysisConsumer::HandleDeclsCallGraph(const unsigned LocalTUDeclsSize) {
// Build the Call Graph by adding all the top level declarations to the graph.
// Note: CallGraph can trigger deserialization of more items from a pch
// (though HandleInterestingDecl); triggering additions to LocalTUDecls.
// We rely on random access to add the initially processed Decls to CG.
CallGraph CG;
for (unsigned i = 0 ; i < LocalTUDeclsSize ; ++i) {
CG.addToCallGraph(LocalTUDecls[i]);
}
// Walk over all of the call graph nodes in topological order, so that we
// analyze parents before the children. Skip the functions inlined into
// the previously processed functions. Use external Visited set to identify
// inlined functions. The topological order allows the "do not reanalyze
// previously inlined function" performance heuristic to be triggered more
// often.
SetOfConstDecls Visited;
SetOfConstDecls VisitedAsTopLevel;
llvm::ReversePostOrderTraversal<clang::CallGraph*> RPOT(&CG);
for (llvm::ReversePostOrderTraversal<clang::CallGraph*>::rpo_iterator
I = RPOT.begin(), E = RPOT.end(); I != E; ++I) {
NumFunctionTopLevel++;
CallGraphNode *N = *I;
Decl *D = N->getDecl();
string ssStart = D->getLocStart().printToString(Mgr->getASTContext().getSourceManager());
// Skip the abstract root node.
if (!D)
continue;
// Skip the functions which have been processed already or previously
// inlined.
if (shouldSkipFunction(D, Visited, VisitedAsTopLevel))
continue;
// Analyze the function.
SetOfConstDecls VisitedCallees;
HandleCode(D, AM_Path,
(Mgr->options.InliningMode == All ? nullptr : &VisitedCallees));
// Add the visited callees to the global visited set.
for (SetOfConstDecls::iterator I = VisitedCallees.begin(),
E = VisitedCallees.end(); I != E; ++I) {
Visited.insert(*I);
}
VisitedAsTopLevel.insert(D);
}
}
