Add support to describe template parameter type in debug info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124752 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 32 insertions, 0 deletions

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 5c63ab5..28c41f8 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1151,6 +1151,18 @@ void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
       DIDescriptor Context = CTy.getContext();
       addToContextOwner(&Buffer, Context);
     }
+
+    if (Tag == dwarf::DW_TAG_class_type) {
+      DIArray TParams = CTy.getTemplateParams();
+      unsigned N = TParams.getNumElements();
+      // Add template parameters.
+      for (unsigned i = 0; i < N; ++i) {
+        DIDescriptor Element = TParams.getElement(i);
+        if (Element.isTemplateTypeParameter())
+          Buffer.addChild(getOrCreateTemplateTypeParameterDIE(
+                            DITemplateTypeParameter(Element)));
+      }
+    }
     break;
   }
   default:
@@ -1181,6 +1193,21 @@ void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
   }
 }
 
+/// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE 
+/// for the given DITemplateTypeParameter.
+DIE *
+DwarfDebug::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
+  CompileUnit *TypeCU = getCompileUnit(TP);
+  DIE *ParamDIE = TypeCU->getDIE(TP);
+  if (ParamDIE)
+    return ParamDIE;
+
+  ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
+  addType(ParamDIE, TP.getType());
+  addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName());
+  return ParamDIE;
+}
+
 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
 void DwarfDebug::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
   int64_t L = SR.getLo();
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 73451ef..5d2fb5b 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -52,6 +52,7 @@ class DIType;
 class DINameSpace;
 class DISubrange;
 class DICompositeType;
+class DITemplateTypeParameter;
 
 //===----------------------------------------------------------------------===//
 /// SrcLineInfo - This class is used to record source line correspondence.
@@ -342,6 +343,10 @@ private:
   /// given DIType.
   DIE *getOrCreateTypeDIE(DIType Ty);
 
+  /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE 
+  /// for the given DITemplateTypeParameter.
+  DIE *getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP);
+
   void addPubTypes(DISubprogram SP);
 
   /// constructTypeDIE - Construct basic type die from DIBasicType.