Subprogram is a scope. Derive DISubprogram from DIScope.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80637 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/DebugInfo.h

@@ -342,11 +342,26 @@ namespace llvm {
   };
 
   /// DISubprogram - This is a wrapper for a subprogram (e.g. a function).
-  class DISubprogram : public DIGlobal {
+  class DISubprogram : public DIScope {
   public:
-    explicit DISubprogram(MDNode *N = 0)
-      : DIGlobal(N, dwarf::DW_TAG_subprogram) {}
+    explicit DISubprogram(MDNode *N = 0) {
+      DbgNode = N;
+      if (DbgNode && !isSubprogram())
+	DbgNode = 0;
+    }
 
+    DIDescriptor getContext() const     { return getDescriptorField(2); }
+    const std::string &getName(std::string &F) const {
+      return getStringField(3, F);
+    }
+    const std::string &getDisplayName(std::string &F) const {
+      return getStringField(4, F);
+    }
+    const std::string &getLinkageName(std::string &F) const {
+      return getStringField(5, F);
+    }
+    DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(6); }
+    unsigned getLineNumber() const      { return getUnsignedField(7); }
     DICompositeType getType() const { return getFieldAs<DICompositeType>(8); }
 
     /// getReturnTypeName - Subprogram return types are encoded either as
@@ -362,6 +377,11 @@ namespace llvm {
       return T.getName(F);
     }
 
+    /// isLocalToUnit - Return true if this subprogram is local to the current
+    /// compile unit, like 'static' in C.
+    unsigned isLocalToUnit() const      { return getUnsignedField(9); }
+    unsigned isDefinition() const       { return getUnsignedField(10); }
+
     /// Verify - Verify that a subprogram descriptor is well formed.
     bool Verify() const;
 

lib/Analysis/DebugInfo.cpp

@@ -494,7 +494,24 @@ void DIGlobal::dump() const {
 
 /// dump - Print subprogram.
 void DISubprogram::dump() const {
-  DIGlobal::dump();
+  std::string Res;
+  if (!getName(Res).empty())
+    errs() << " [" << Res << "] ";
+
+  unsigned Tag = getTag();
+  errs() << " [" << dwarf::TagString(Tag) << "] ";
+
+  // TODO : Print context
+  getCompileUnit().dump();
+  errs() << " [" << getLineNumber() << "] ";
+
+  if (isLocalToUnit())
+    errs() << " [local] ";
+
+  if (isDefinition())
+    errs() << " [def] ";
+
+  errs() << "\n";
 }
 
 /// dump - Print global variable.

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

@@ -487,6 +487,23 @@ void DwarfDebug::AddSourceLine(DIE *Die, const DIGlobal *G) {
   AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
   AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
 }
+
+/// AddSourceLine - Add location information to specified debug information
+/// entry.
+void DwarfDebug::AddSourceLine(DIE *Die, const DISubprogram *SP) {
+  // If there is no compile unit specified, don't add a line #.
+  if (SP->getCompileUnit().isNull())
+    return;
+
+  unsigned Line = SP->getLineNumber();
+  unsigned FileID = FindCompileUnit(SP->getCompileUnit()).getID();
+  assert(FileID && "Invalid file id");
+  AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+  AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+
+/// AddSourceLine - Add location information to specified debug information
+/// entry.
 void DwarfDebug::AddSourceLine(DIE *Die, const DIType *Ty) {
   // If there is no compile unit specified, don't add a line #.
   DICompileUnit CU = Ty->getCompileUnit();

lib/CodeGen/AsmPrinter/DwarfDebug.h

@@ -275,11 +275,8 @@ class VISIBILITY_HIDDEN DwarfDebug : public Dwarf {
   /// AddSourceLine - Add location information to specified debug information
   /// entry.
   void AddSourceLine(DIE *Die, const DIVariable *V);
-
-  /// AddSourceLine - Add location information to specified debug information
-  /// entry.
   void AddSourceLine(DIE *Die, const DIGlobal *G);
-
+  void AddSourceLine(DIE *Die, const DISubprogram *SP);
   void AddSourceLine(DIE *Die, const DIType *Ty);
 
   /// AddAddress - Add an address attribute to a die based on the location