Support for nested functions/classes in debug output. Radar 7424645.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105492 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 44 insertions, 21 deletions

diff --git a/include/llvm/Analysis/DebugInfo.h b/include/llvm/Analysis/DebugInfo.h
index 473b127..d468b4e 100644
--- a/include/llvm/Analysis/DebugInfo.h
+++ b/include/llvm/Analysis/DebugInfo.h
@@ -56,6 +56,7 @@ namespace llvm {
     }
 
     GlobalVariable *getGlobalVariableField(unsigned Elt) const;
+    Function *getFunctionField(unsigned Elt) const;
 
   public:
     explicit DIDescriptor() : DbgNode(0) {}
@@ -409,6 +410,8 @@ namespace llvm {
     /// describes - Return true if this subprogram provides debugging
     /// information for the function F.
     bool describes(const Function *F);
+
+    Function *getFunction() const { return getFunctionField(16); }
   };
 
   /// DIGlobalVariable - This is a wrapper for a global variable.
@@ -658,7 +661,8 @@ namespace llvm {
                                   unsigned VIndex = 0,
                                   DIType = DIType(),
                                   bool isArtificial = 0,
-                                  bool isOptimized = false);
+                                  bool isOptimized = false,
+                                  Function *Fn = 0);
 
     /// CreateSubprogramDefinition - Create new subprogram descriptor for the
     /// given declaration. 
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index a7b6d2b..e5c2e26 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -73,6 +73,15 @@ GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
   return 0;
 }
 
+Function *DIDescriptor::getFunctionField(unsigned Elt) const {
+  if (DbgNode == 0)
+    return 0;
+
+  if (Elt < DbgNode->getNumOperands())
+      return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
+  return 0;
+}
+
 unsigned DIVariable::getNumAddrElements() const {
   return DbgNode->getNumOperands()-6;
 }
@@ -938,7 +947,8 @@ DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
                                          unsigned VK, unsigned VIndex,
                                          DIType ContainingType,
                                          bool isArtificial,
-                                         bool isOptimized) {
+                                         bool isOptimized,
+                                         Function *Fn) {
 
   Value *Elts[] = {
     GetTagConstant(dwarf::DW_TAG_subprogram),
@@ -956,9 +966,10 @@ DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
     ConstantInt::get(Type::getInt32Ty(VMContext), VIndex),
     ContainingType,
     ConstantInt::get(Type::getInt1Ty(VMContext), isArtificial),
-    ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized)
+    ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
+    Fn
   };
-  return DISubprogram(MDNode::get(VMContext, &Elts[0], 16));
+  return DISubprogram(MDNode::get(VMContext, &Elts[0], 17));
 }
 
 /// CreateSubprogramDefinition - Create new subprogram descriptor for the
@@ -979,14 +990,15 @@ DISubprogram DIFactory::CreateSubprogramDefinition(DISubprogram &SPDeclaration)
     DeclNode->getOperand(7), // LineNo
     DeclNode->getOperand(8), // Type
     DeclNode->getOperand(9), // isLocalToUnit
-    ConstantInt::get(Type::getInt1Ty(VMContext), true),
+    ConstantInt::get(Type::getInt1Ty(VMContext), true), // isDefinition
     DeclNode->getOperand(11), // Virtuality
     DeclNode->getOperand(12), // VIndex
     DeclNode->getOperand(13), // Containting Type
     DeclNode->getOperand(14), // isArtificial
-    DeclNode->getOperand(15)  // isOptimized
+    DeclNode->getOperand(15), // isOptimized
+    DeclNode->getOperand(16)  // Function*
   };
-  return DISubprogram(MDNode::get(VMContext, &Elts[0], 16));
+  return DISubprogram(MDNode::get(VMContext, &Elts[0], 17));
 }
 
 /// CreateGlobalVariable - Create a new descriptor for the specified global.
@@ -1110,18 +1122,6 @@ DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
   return DILocation(MDNode::get(VMContext, &Elts[0], 4));
 }
 
-/// CreateLocation - Creates a debug info location.
-DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
-                                     DIScope S, MDNode *OrigLoc) {
- Value *Elts[] = {
-    ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
-    ConstantInt::get(Type::getInt32Ty(VMContext), ColumnNo),
-    S,
-    OrigLoc
-  };
-  return DILocation(MDNode::get(VMContext, &Elts[0], 4));
-}
-
 //===----------------------------------------------------------------------===//
 // DIFactory: Routines for inserting code into a function
 //===----------------------------------------------------------------------===//
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index eca94cb..e3b93fb 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -866,6 +866,10 @@ void DwarfDebug::addToContextOwner(DIE *Die, DIDescriptor Context) {
   } else if (Context.isNameSpace()) {
     DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context));
     ContextDIE->addChild(Die);
+  } else if (Context.isSubprogram()) {
+    DIE *ContextDIE = createSubprogramDIE(DISubprogram(Context),
+                                          /*MakeDecl=*/false);
+    ContextDIE->addChild(Die);
   } else if (DIE *ContextDIE = getCompileUnit(Context)->getDIE(Context))
     ContextDIE->addChild(Die);
   else 
@@ -1055,6 +1059,10 @@ void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
     if (DIDescriptor(ContainingType).isCompositeType())
       addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, 
                   getOrCreateTypeDIE(DIType(ContainingType)));
+    else {
+      DIDescriptor Context = CTy.getContext();
+      addToContextOwner(&Buffer, Context);
+    }
     break;
   }
   default:
@@ -1329,6 +1337,9 @@ DIE *DwarfDebug::createSubprogramDIE(const DISubprogram &SP, bool MakeDecl) {
   // DW_TAG_inlined_subroutine may refer to this DIE.
   SPCU->insertDIE(SP, SPDie);
 
+  // Add to context owner.
+  addToContextOwner(SPDie, SP.getContext());
+
   return SPDie;
 }
 
@@ -2341,8 +2352,14 @@ DbgScope *DwarfDebug::getOrCreateDbgScope(const MDNode *Scope, const MDNode *Inl
     }
 
     if (!WScope->getParent()) {
+      // The SPName check is the "old way," kept here for backwards
+      // compatibility with the existing .ll test cases in the LLVM
+      // test suite.  The debug info for some functions omits any
+      // linkage name because it confuses GDB.  Updated front-ends
+      // should include a Function * that we can check instead.
       StringRef SPName = DISubprogram(Scope).getLinkageName();
-      if (SPName == Asm->MF->getFunction()->getName())
+      if ((SPName == Asm->MF->getFunction()->getName()) ||
+          (DISubprogram(Scope).getFunction() == Asm->MF->getFunction()))
         CurrentFnDbgScope = WScope;
     }
     
diff --git a/test/FrontendC++/2010-02-17-DbgArtificialArg.cpp b/test/FrontendC++/2010-02-17-DbgArtificialArg.cpp
index 2a9f1f1..ff45412 100644
--- a/test/FrontendC++/2010-02-17-DbgArtificialArg.cpp
+++ b/test/FrontendC++/2010-02-17-DbgArtificialArg.cpp
@@ -1,4 +1,4 @@
-// RUN: %llvmgcc -g -S %s -o - | grep DW_TAG_pointer_type |  grep "i32 524303, metadata .., metadata ..., metadata .., i32 ., i64 .., i64 .., i64 0, i32 64, metadata ..."
+// RUN: %llvmgcc -g -S %s -o - | FileCheck %s
 // Here, second to last argument "i32 64" indicates that artificial type is set.                                               
 // Test to artificial attribute attahed to "this" pointer type.
 // Radar 7655792 and 7655002
@@ -10,5 +10,7 @@ public:
 
 int foo() {
   A a;
+  // Matching "i32 64, metadata !<number>} ; [ DW_TAG_pointer_type ]"
+  // CHECK: i32 64, metadata {{![0-9]+\} ; \[ DW_TAG_pointer_type \]}}
   return a.fn1(1);
 }