commit 62fdfb5fa7efdfd61339e4abe6fd87e60e939e58
author David Blaikie <dblaikie@gmail.com> Mon Jan 07 05:51:15 2013 +0000
committer David Blaikie <dblaikie@gmail.com> Mon Jan 07 05:51:15 2013 +0000
tree 8bc041a867c00dad763d611bd16417920b2b45cb
parent 71ab7a79a74ebb3dad1aac02c5a5c7c2c20b547f

PR14759: Debug info support for C++ member pointers.

This works fine with GDB for member variable pointers, but GDB's support for
member function pointers seems to be quite unrelated to
DW_TAG_ptr_to_member_type. (see GDB bug 14998 for details)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171698 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/DIBuilder.cpp

diff --git a/lib/IR/DIBuilder.cpp b/lib/IR/DIBuilder.cpp
index 802c332..9fd0cd8 100644
--- a/lib/IR/DIBuilder.cpp
+++ b/lib/IR/DIBuilder.cpp
@@ -229,6 +229,24 @@
   return DIType(MDNode::get(VMContext, Elts));
 }
 
+DIType DIBuilder::createMemberPointerType(DIType PointeeTy, DIType Base) {
+  // Pointer types are encoded in DIDerivedType format.
+  Value *Elts[] = {
+    GetTagConstant(VMContext, dwarf::DW_TAG_ptr_to_member_type),
+    NULL, //TheCU,
+    NULL,
+    NULL, // Filename
+    ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line
+    ConstantInt::get(Type::getInt64Ty(VMContext), 0),
+    ConstantInt::get(Type::getInt64Ty(VMContext), 0),
+    ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset
+    ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags
+    PointeeTy,
+    Base
+  };
+  return DIType(MDNode::get(VMContext, Elts));
+}
+
 /// createReferenceType - Create debugging information entry for a reference
 /// type.
 DIType DIBuilder::createReferenceType(unsigned Tag, DIType RTy) {

lib/IR/DebugInfo.cpp

diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index 5dd9dd1..b5e1d17 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -172,6 +172,7 @@
   switch (getTag()) {
   case dwarf::DW_TAG_typedef:
   case dwarf::DW_TAG_pointer_type:
+  case dwarf::DW_TAG_ptr_to_member_type:
   case dwarf::DW_TAG_reference_type:
   case dwarf::DW_TAG_rvalue_reference_type:
   case dwarf::DW_TAG_const_type:
@@ -423,6 +424,7 @@
   unsigned Tag = getTag();
   if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
       Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
+      Tag != dwarf::DW_TAG_ptr_to_member_type &&
       Tag != dwarf::DW_TAG_reference_type &&
       Tag != dwarf::DW_TAG_rvalue_reference_type &&
       Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_vector_type &&