Add template type and value parameter metadata nodes to template variable specializations

Summary: Add an optional attribute referring to a tuple of type and value template parameter nodes to the DIGlobalVariable node. This allows us to record the parameters of template variable specializations.

Reviewers: dblaikie, aprantl, probinson, JDevlieghere, clayborg, jingham

Reviewed By: JDevlieghere

Subscribers: cfe-commits

Tags: #debug-info

Differential Revision: https://reviews.llvm.org/D52058

llvm-svn: 343707

1 files changed, 8 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
index 8641c2d8969..b007621c723 100644
--- a/clang/lib/CodeGen/CGDebugInfo.h
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -248,6 +248,11 @@ class CGDebugInfo {
   llvm::DINodeArray CollectFunctionTemplateParams(const FunctionDecl *FD,
                                                   llvm::DIFile *Unit);
 
+  /// A helper function to collect debug info for function template
+  /// parameters.
+  llvm::DINodeArray CollectVarTemplateParams(const VarDecl *VD,
+                                             llvm::DIFile *Unit);
+
   /// A helper function to collect debug info for template
   /// parameters.
   llvm::DINodeArray
@@ -645,7 +650,9 @@ private:
   /// Collect various properties of a VarDecl.
   void collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
                            unsigned &LineNo, QualType &T, StringRef &Name,
-                           StringRef &LinkageName, llvm::DIScope *&VDContext);
+                           StringRef &LinkageName,
+                           llvm::MDTuple *&TemplateParameters,
+                           llvm::DIScope *&VDContext);
 
   /// Allocate a copy of \p A using the DebugInfoNames allocator
   /// and return a reference to it. If multiple arguments are given the strings