DebugInfo: Use the scope of the function declaration, if any, to name a function in DWARF pubnames

This ensures that member functions, for example, are entered into
pubnames with their fully qualified name, rather than inside the global
namespace.

llvm-svn: 210379
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index 33cdcef..a42897f 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -1401,6 +1401,13 @@
   return &SPDie;
 }
 
+void DwarfUnit::applySubprogramAttributesToDefinition(DISubprogram SP, DIE &SPDie) {
+  DISubprogram SPDecl = SP.getFunctionDeclaration();
+  DIScope Context = resolve(SPDecl ? SPDecl.getContext() : SP.getContext());
+  applySubprogramAttributes(SP, SPDie);
+  addGlobalName(SP.getName(), SPDie, Context);
+}
+
 void DwarfUnit::applySubprogramAttributes(DISubprogram SP, DIE &SPDie) {
   DIE *DeclDie = nullptr;
   StringRef DeclLinkageName;