Revert "Emit DW_AT_object_pointer once, on the declaration, for each function."

Breaks GDB buildbot
(http://lab.llvm.org:8011/builders/clang-x86_64-ubuntu-gdb-75/builds/14517)

GCC emits DW_AT_object_pointer /everywhere/ (declaration, abstract
definition, inlined subroutine), but it looks like GCC relies on it
being somewhere other than the declaration, at least. I'll experiment
further & can hopefully still remove it from the inlined_subroutine.

This reverts commit r207705.

llvm-svn: 207719

4 files changed, 8 insertions, 18 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 6960ec94551..91a7b6e53aa 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -557,16 +557,11 @@ DIE *DwarfDebug::createScopeChildrenDIE(
 }
 
 void DwarfDebug::createAndAddScopeChildren(DwarfCompileUnit &TheCU,
-                                           LexicalScope *Scope,
-                                           DISubprogram Sub, DIE &ScopeDIE) {
+                                           LexicalScope *Scope, DIE &ScopeDIE) {
   // We create children when the scope DIE is not null.
   SmallVector<std::unique_ptr<DIE>, 8> Children;
   if (DIE *ObjectPointer = createScopeChildrenDIE(TheCU, Scope, Children))
-    // The declaration will have the object_pointer, otherwise put it on the
-    // definition. This happens with ObjC blocks that have object_pointer on
-    // non-member functions.
-    if (!Sub.getFunctionDeclaration())
-      TheCU.addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, *ObjectPointer);
+    TheCU.addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, *ObjectPointer);
 
   // Add children
   for (auto &I : Children)
@@ -585,7 +580,7 @@ void DwarfDebug::constructAbstractSubprogramScopeDIE(DwarfCompileUnit &TheCU,
 
   if (DIE *ScopeDIE = TheCU.getDIE(Sub)) {
     AbstractSPDies.insert(std::make_pair(Sub, ScopeDIE));
-    createAndAddScopeChildren(TheCU, Scope, Sub, *ScopeDIE);
+    createAndAddScopeChildren(TheCU, Scope, *ScopeDIE);
   }
 }
 
@@ -602,7 +597,7 @@ DIE &DwarfDebug::constructSubprogramScopeDIE(DwarfCompileUnit &TheCU,
 
   DIE &ScopeDIE = updateSubprogramScopeDIE(TheCU, Sub);
 
-  createAndAddScopeChildren(TheCU, Scope, Sub, ScopeDIE);
+  createAndAddScopeChildren(TheCU, Scope, ScopeDIE);
 
   return ScopeDIE;
 }
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index e0d7ef4d893..f0472e93f55 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -368,7 +368,7 @@ class DwarfDebug : public AsmPrinterHandler {
   std::unique_ptr<DIE> constructScopeDIE(DwarfCompileUnit &TheCU,
                                          LexicalScope *Scope);
   void createAndAddScopeChildren(DwarfCompileUnit &TheCU, LexicalScope *Scope,
-                                 DISubprogram Sub, DIE &ScopeDIE);
+                                 DIE &ScopeDIE);
   /// \brief Construct a DIE for this abstract scope.
   void constructAbstractSubprogramScopeDIE(DwarfCompileUnit &TheCU,
                                            LexicalScope *Scope);
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index d37dcf27378..2d7e1c93dd5 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -1164,8 +1164,7 @@ void DwarfUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
 }
 
 /// constructSubprogramArguments - Construct function argument DIEs.
-DIE *DwarfUnit::constructSubprogramArguments(DIE &Buffer, DIArray Args) {
-  DIE *ObjectPointer = nullptr;
+void DwarfUnit::constructSubprogramArguments(DIE &Buffer, DIArray Args) {
   for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
     DIDescriptor Ty = Args.getElement(i);
     if (Ty.isUnspecifiedParameter()) {
@@ -1176,11 +1175,8 @@ DIE *DwarfUnit::constructSubprogramArguments(DIE &Buffer, DIArray Args) {
       addType(Arg, DIType(Ty));
       if (DIType(Ty).isArtificial())
         addFlag(Arg, dwarf::DW_AT_artificial);
-      if (DIType(Ty).isObjectPointer())
-        ObjectPointer = &Arg;
     }
   }
-  return ObjectPointer;
 }
 
 /// constructTypeDIE - Construct type DIE from DICompositeType.
@@ -1501,8 +1497,7 @@ DIE *DwarfUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
 
     // Add arguments. Do not add arguments for subprogram definition. They will
     // be handled while processing variables.
-    if (DIE *ObjectPointer = constructSubprogramArguments(SPDie, Args))
-      addDIEEntry(SPDie, dwarf::DW_AT_object_pointer, *ObjectPointer);
+    constructSubprogramArguments(SPDie, Args);
   }
 
   if (SP.isArtificial())
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
index 5beae1e29c4..b2ac647e00e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
@@ -418,7 +418,7 @@ public:
                                             AbstractOrInlined AbsIn = AOI_None);
 
   /// constructSubprogramArguments - Construct function argument DIEs.
-  DIE *constructSubprogramArguments(DIE &Buffer, DIArray Args);
+  void constructSubprogramArguments(DIE &Buffer, DIArray Args);
 
   /// Create a DIE with the given Tag, add the DIE to its parent, and
   /// call insertDIE if MD is not null.