Add support for viewing the module graph via Graphviz, for debugging
purposes.
llvm-svn: 141697
diff --git a/clang/lib/Serialization/ModuleManager.cpp b/clang/lib/Serialization/ModuleManager.cpp
index a9fe64d..c4b1f71 100644
--- a/clang/lib/Serialization/ModuleManager.cpp
+++ b/clang/lib/Serialization/ModuleManager.cpp
@@ -16,6 +16,10 @@
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/system_error.h"
+#ifndef NDEBUG
+#include "llvm/Support/GraphWriter.h"
+#endif
+
using namespace clang;
using namespace serialization;
@@ -202,3 +206,48 @@
return;
}
}
+
+#ifndef NDEBUG
+namespace llvm {
+ template<>
+ struct GraphTraits<ModuleManager> {
+ typedef Module NodeType;
+ typedef llvm::SetVector<Module *>::const_iterator ChildIteratorType;
+ typedef ModuleManager::ModuleConstIterator nodes_iterator;
+
+ static ChildIteratorType child_begin(NodeType *Node) {
+ return Node->Imports.begin();
+ }
+
+ static ChildIteratorType child_end(NodeType *Node) {
+ return Node->Imports.end();
+ }
+
+ static nodes_iterator nodes_begin(const ModuleManager &Manager) {
+ return Manager.begin();
+ }
+
+ static nodes_iterator nodes_end(const ModuleManager &Manager) {
+ return Manager.end();
+ }
+ };
+
+ template<>
+ struct DOTGraphTraits<ModuleManager> : public DefaultDOTGraphTraits {
+ explicit DOTGraphTraits(bool IsSimple = false)
+ : DefaultDOTGraphTraits(IsSimple) { }
+
+ static bool renderGraphFromBottomUp() {
+ return true;
+ }
+
+ std::string getNodeLabel(Module *M, const ModuleManager&) {
+ return llvm::sys::path::stem(M->FileName);
+ }
+ };
+}
+
+void ModuleManager::viewGraph() {
+ llvm::ViewGraph(*this, "Modules");
+}
+#endif