DebugInfo: Provide a new hook to encode relationship between a property and an ivar.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149874 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 42 insertions, 0 deletions

diff --git a/lib/Analysis/DIBuilder.cpp b/lib/Analysis/DIBuilder.cpp
index ee7ecd1b05..cfb58f6243 100644
--- a/lib/Analysis/DIBuilder.cpp
+++ b/lib/Analysis/DIBuilder.cpp
@@ -359,6 +359,30 @@ DIType DIBuilder::createObjCIVar(StringRef Name,
   return DIType(MDNode::get(VMContext, Elts));
 }
 
+/// createObjCIVar - Create debugging information entry for Objective-C
+/// instance variable.
+DIType DIBuilder::createObjCIVar(StringRef Name,
+                                 DIFile File, unsigned LineNumber,
+                                 uint64_t SizeInBits, uint64_t AlignInBits,
+                                 uint64_t OffsetInBits, unsigned Flags,
+                                 DIType Ty, MDNode *PropertyNode) {
+  // TAG_member is encoded in DIDerivedType format.
+  Value *Elts[] = {
+    GetTagConstant(VMContext, dwarf::DW_TAG_member),
+    getNonCompileUnitScope(File),
+    MDString::get(VMContext, Name),
+    File,
+    ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+    ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
+    ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
+    ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
+    ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+    Ty,
+    PropertyNode
+  };
+  return DIType(MDNode::get(VMContext, Elts));
+}
+
 /// createObjCProperty - Create debugging information entry for Objective-C
 /// property.
 DIObjCProperty DIBuilder::createObjCProperty(StringRef Name, 
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index a2d2c5f580..5cbd15e4c7 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -510,6 +510,13 @@ uint64_t DIDerivedType::getOriginalTypeSize() const {
   return getSizeInBits();
 }
 
+/// getObjCProperty - Return property node, if this ivar is associated with one.
+MDNode *DIDerivedType::getObjCProperty() const {
+  if (getVersion() <= LLVMDebugVersion11 || DbgNode->getNumOperands() <= 10)
+    return NULL;
+  return dyn_cast_or_null<MDNode>(DbgNode->getOperand(10));
+}
+
 /// isInlinedFnArgument - Return true if this variable provides debugging
 /// information for an inlined function arguments.
 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index f95ba3c93f..f55dd1fc6e 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -851,6 +851,12 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
         if (PropertyAttributes)
           addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, 0, 
                  PropertyAttributes);
+
+	DIEEntry *Entry = getDIEEntry(Element);
+	if (!Entry) {
+	  Entry = createDIEEntry(ElemDie);
+	  insertDIEEntry(Element, Entry);
+	}
       } else
         continue;
       Buffer.addChild(ElemDie);
@@ -1455,6 +1461,11 @@ DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
             dwarf::DW_VIRTUALITY_virtual);
 
   // Objective-C properties.
+  if (MDNode *PNode = DT.getObjCProperty())
+    if (DIEEntry *PropertyDie = getDIEEntry(PNode))
+      MemberDie->addValue(dwarf::DW_AT_APPLE_property, dwarf::DW_FORM_ref4, 
+                          PropertyDie);
+
   // This is only for backward compatibility.
   StringRef PropertyName = DT.getObjCPropertyName();
   if (!PropertyName.empty()) {