[PATCH] D139989: [clang][DebugInfo] Add DW_AT_default_value support for template template parameters

[Michael Buch via Phabricator via cfe-commits]

Michael137 updated this revision to Diff 483346.
Michael137 added a comment.

- Rebase


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D139989/new/

https://reviews.llvm.org/D139989

Files:
  clang/lib/CodeGen/CGDebugInfo.cpp
  clang/test/CodeGenCXX/debug-info-template-parameter.cpp
  llvm/include/llvm/IR/DIBuilder.h
  llvm/lib/IR/DIBuilder.cpp


Index: llvm/lib/IR/DIBuilder.cpp
===================================================================
--- llvm/lib/IR/DIBuilder.cpp
+++ llvm/lib/IR/DIBuilder.cpp
@@ -474,10 +474,11 @@
 
 DITemplateValueParameter *
 DIBuilder::createTemplateTemplateParameter(DIScope *Context, StringRef Name,
-                                           DIType *Ty, StringRef Val) {
+                                           DIType *Ty, StringRef Val,
+                                           bool IsDefault) {
   return createTemplateValueParameterHelper(
       VMContext, dwarf::DW_TAG_GNU_template_template_param, Context, Name, Ty,
-      false, MDString::get(VMContext, Val));
+      IsDefault, MDString::get(VMContext, Val));
 }
 
 DITemplateValueParameter *
Index: llvm/include/llvm/IR/DIBuilder.h
===================================================================
--- llvm/include/llvm/IR/DIBuilder.h
+++ llvm/include/llvm/IR/DIBuilder.h
@@ -518,10 +518,10 @@
     /// \param Name         Value parameter name.
     /// \param Ty           Parameter type.
     /// \param Val          The fully qualified name of the template.
-    DITemplateValueParameter *createTemplateTemplateParameter(DIScope *Scope,
-                                                              StringRef Name,
-                                                              DIType *Ty,
-                                                              StringRef Val);
+    /// \param IsDefault    Parameter is default or not.
+    DITemplateValueParameter *
+    createTemplateTemplateParameter(DIScope *Scope, StringRef Name, DIType *Ty,
+                                    StringRef Val, bool IsDefault);
 
     /// Create debugging information for a template parameter pack.
     /// \param Scope        Scope in which this type is defined.
Index: clang/test/CodeGenCXX/debug-info-template-parameter.cpp
===================================================================
--- clang/test/CodeGenCXX/debug-info-template-parameter.cpp
+++ clang/test/CodeGenCXX/debug-info-template-parameter.cpp
@@ -23,17 +23,37 @@
 // CXX17: [[THIRD]] = !DITemplateValueParameter(name: "b", type: !{{[0-9]*}}, defaulted: true, value: i1 true)
 // CHECK: [[FIFTH]] = !DITemplateTypeParameter(name: "d", type: !{{[0-9]*}}, defaulted: true)
 
+// CHECK: DILocalVariable(name: "b1", {{.*}}, type: ![[TEMPLATE_TYPE:[0-9]+]]
+// CHECK: [[TEMPLATE_TYPE]] = {{.*}}!DICompositeType({{.*}}, templateParams: ![[B1_TYPE:[0-9]+]]
+// CHECK: [[B1_TYPE]] = !{![[FIRST:[0-9]+]]}
+// CHECK: [[FIRST]] = !DITemplateValueParameter(tag: DW_TAG_GNU_template_template_param, name: "CT", value: !"qux")
+
+// CHECK: DILocalVariable(name: "b2", {{.*}}, type: ![[TEMPLATE_TYPE:[0-9]+]]
+// CHECK: [[TEMPLATE_TYPE]] = {{.*}}!DICompositeType({{.*}}, templateParams: ![[B2_TYPE:[0-9]+]]
+// CHECK: [[B2_TYPE]] = !{![[FIRST:[0-9]+]]}
+// CHECK: [[FIRST]] = !DITemplateValueParameter(tag: DW_TAG_GNU_template_template_param, name: "CT", defaulted: true, value: !"bar")
+
 template <typename T>
 class bar {
 };
 
+template <typename T>
+class qux {
+};
+
 template <typename T = char, int i = 3, bool b = true, int x = sizeof(T),
           typename d = bar<T>>
 class foo {
 };
 
+template <template <typename T> class CT = bar>
+class baz {
+};
+
 int main() {
   foo<int, 6, false, 3, double> f1;
   foo<> f2;
+  baz<qux> b1;
+  baz<> b2;
   return 0;
 }
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2092,7 +2092,7 @@
       TA.getAsTemplate().getAsTemplateDecl()->printQualifiedName(
           OS, getPrintingPolicy());
       TemplateParams.push_back(DBuilder.createTemplateTemplateParameter(
-          TheCU, Name, nullptr, OS.str()));
+          TheCU, Name, nullptr, OS.str(), defaultParameter));
       break;
     }
     case TemplateArgument::Pack:


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