Add some support for dealing with an object pointer on arguments.

Part of rdar://9797999

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163667 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 16 insertions, 0 deletions

diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 0007f13e91..4b65a9b572 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -1109,6 +1109,8 @@ DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
         addType(Arg, ATy);
         if (ATy.isArtificial())
           addFlag(Arg, dwarf::DW_AT_artificial);
+        if (ATy.isObjectPointer())
+          addFlag(Arg, dwarf::DW_AT_object_pointer);
         SPDie->addChild(Arg);
       }
   }
@@ -1348,6 +1350,8 @@ DIE *CompileUnit::constructVariableDIE(DbgVariable *DV, bool isScopeAbstract) {
 
   if (DV->isArtificial())
     addFlag(VariableDie, dwarf::DW_AT_artificial);
+  if (DV->isObjectPointer())
+    addFlag(VariableDie, dwarf::DW_AT_object_pointer);
 
   if (isScopeAbstract) {
     DV->setDIE(VariableDie);
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 0fface1e3b..b1f0212af5 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -330,6 +330,8 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU,
           SPCU->addType(Arg, ATy);
           if (ATy.isArtificial())
             SPCU->addFlag(Arg, dwarf::DW_AT_artificial);
+          if (ATy.isObjectPointer())
+            SPCU->addFlag(Arg, dwarf::DW_AT_object_pointer);
           SPDie->addChild(Arg);
         }
       DIE *SPDeclDie = SPDie;
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index d662eadab0..d5ae4687df 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -164,6 +164,16 @@ public:
       return true;
     return false;
   }
+
+  bool isObjectPointer()             const {
+    if (Var.isObjectPointer())
+      return true;
+    if (Var.getTag() == dwarf::DW_TAG_arg_variable
+        && getType().isObjectPointer())
+      return true;
+    return false;
+  }
+  
   bool variableHasComplexAddress()   const {
     assert(Var.Verify() && "Invalid complex DbgVariable!");
     return Var.hasComplexAddress();