Generate unique identifiers for Decl objects
The generated identifier is stable across multiple runs,
and can be a great visualization or debugging aide.
Differential Revision: https://reviews.llvm.org/D52113
llvm-svn: 342315
diff --git a/clang/lib/AST/DeclBase.cpp b/clang/lib/AST/DeclBase.cpp
index 796b532..6bb2034 100644
--- a/clang/lib/AST/DeclBase.cpp
+++ b/clang/lib/AST/DeclBase.cpp
@@ -930,6 +930,13 @@
static Decl::Kind getKind(const Decl *D) { return D->getKind(); }
static Decl::Kind getKind(const DeclContext *DC) { return DC->getDeclKind(); }
+int64_t Decl::getID() const {
+ Optional<int64_t> Out = getASTContext().getAllocator().identifyObject(this);
+ assert(Out && "Wrong allocator used");
+ assert(*Out % alignof(Decl) == 0 && "Wrong alignment information");
+ return *Out / alignof(Decl);
+}
+
const FunctionType *Decl::getFunctionType(bool BlocksToo) const {
QualType Ty;
if (const auto *D = dyn_cast<ValueDecl>(this))