Revamp how debugging information is emitted for debug info objects.

It's not necessary for each DI class to have its own copy of `print' and
`dump'. Instead, just give DIDescriptor those methods and have it call the
appropriate debugging printing routine based on the type of the debug
information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159237 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 113 insertions, 196 deletions

diff --git a/include/llvm/Analysis/DebugInfo.h b/include/llvm/Analysis/DebugInfo.h
index eb90ca4ae2..78c4891711 100644
--- a/include/llvm/Analysis/DebugInfo.h
+++ b/include/llvm/Analysis/DebugInfo.h
@@ -104,12 +104,6 @@ namespace llvm {
       return getUnsignedField(0) & ~LLVMDebugVersionMask;
     }
 
-    /// print - print descriptor.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print descriptor to dbgs() with a newline.
-    void dump() const;
-
     bool isDerivedType() const;
     bool isCompositeType() const;
     bool isBasicType() const;
@@ -130,10 +124,18 @@ namespace llvm {
     bool isTemplateTypeParameter() const;
     bool isTemplateValueParameter() const;
     bool isObjCProperty() const;
+
+    /// print - print descriptor.
+    void print(raw_ostream &OS) const;
+
+    /// dump - print descriptor to dbgs() with a newline.
+    void dump() const;
   };
 
   /// DISubrange - This is used to represent ranges, for array bounds.
   class DISubrange : public DIDescriptor {
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DISubrange(const MDNode *N = 0) : DIDescriptor(N) {}
 
@@ -156,6 +158,9 @@ namespace llvm {
   /// DIScope - A base class for various scopes.
   class DIScope : public DIDescriptor {
     virtual void anchor();
+  protected:
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DIScope(const MDNode *N = 0) : DIDescriptor (N) {}
     virtual ~DIScope() {}
@@ -167,6 +172,8 @@ namespace llvm {
   /// DICompileUnit - A wrapper for a compile unit.
   class DICompileUnit : public DIScope {
     virtual void anchor();
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DICompileUnit(const MDNode *N = 0) : DIScope(N) {}
 
@@ -196,17 +203,13 @@ namespace llvm {
 
     /// Verify - Verify that a compile unit is well formed.
     bool Verify() const;
-
-    /// print - print compile unit.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print compile unit to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DIFile - This is a wrapper for a file.
   class DIFile : public DIScope {
     virtual void anchor();
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const {} // FIXME: Output something?
   public:
     explicit DIFile(const MDNode *N = 0) : DIScope(N) {
       if (DbgNode && !isFile())
@@ -224,6 +227,8 @@ namespace llvm {
   /// FIXME: it seems strange that this doesn't have either a reference to the
   /// type/precision or a file/line pair for location info.
   class DIEnumerator : public DIDescriptor {
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DIEnumerator(const MDNode *N = 0) : DIDescriptor(N) {}
 
@@ -237,12 +242,12 @@ namespace llvm {
   class DIType : public DIScope {
     virtual void anchor();
   protected:
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
     // This ctor is used when the Tag has already been validated by a derived
     // ctor.
     DIType(const MDNode *N, bool, bool) : DIScope(N) {}
-
   public:
-
     /// Verify - Verify that a type descriptor is well formed.
     bool Verify() const;
     explicit DIType(const MDNode *N);
@@ -314,12 +319,6 @@ namespace llvm {
     /// this descriptor.
     void replaceAllUsesWith(DIDescriptor &D);
     void replaceAllUsesWith(MDNode *D);
-
-    /// print - print type.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print type to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DIBasicType - A basic type, like 'int' or 'float'.
@@ -332,18 +331,14 @@ namespace llvm {
 
     /// Verify - Verify that a basic type descriptor is well formed.
     bool Verify() const;
-
-    /// print - print basic type.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print basic type to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DIDerivedType - A simple derived type, like a const qualified type,
   /// a typedef, a pointer or reference, etc.
   class DIDerivedType : public DIType {
     virtual void anchor();
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   protected:
     explicit DIDerivedType(const MDNode *N, bool, bool)
       : DIType(N, true, true) {}
@@ -401,12 +396,6 @@ namespace llvm {
 
     /// Verify - Verify that a derived type descriptor is well formed.
     bool Verify() const;
-
-    /// print - print derived type.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print derived type to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DICompositeType - This descriptor holds a type that can refer to multiple
@@ -414,6 +403,8 @@ namespace llvm {
   /// FIXME: Why is this a DIDerivedType??
   class DICompositeType : public DIDerivedType {
     virtual void anchor();
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DICompositeType(const MDNode *N = 0)
       : DIDerivedType(N, true, true) {
@@ -430,12 +421,6 @@ namespace llvm {
 
     /// Verify - Verify that a composite type descriptor is well formed.
     bool Verify() const;
-
-    /// print - print composite type.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print composite type to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DITemplateTypeParameter - This is a wrapper for template type parameter.
@@ -478,6 +463,8 @@ namespace llvm {
   /// DISubprogram - This is a wrapper for a subprogram (e.g. a function).
   class DISubprogram : public DIScope {
     virtual void anchor();
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DISubprogram(const MDNode *N = 0) : DIScope(N) {}
 
@@ -576,12 +563,6 @@ namespace llvm {
     /// Verify - Verify that a subprogram descriptor is well formed.
     bool Verify() const;
 
-    /// print - print subprogram.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print subprogram to dbgs() with a newline.
-    void dump() const;
-
     /// describes - Return true if this subprogram provides debugging
     /// information for the function F.
     bool describes(const Function *F);
@@ -597,6 +578,8 @@ namespace llvm {
 
   /// DIGlobalVariable - This is a wrapper for a global variable.
   class DIGlobalVariable : public DIDescriptor {
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DIGlobalVariable(const MDNode *N = 0) : DIDescriptor(N) {}
 
@@ -634,17 +617,13 @@ namespace llvm {
 
     /// Verify - Verify that a global variable descriptor is well formed.
     bool Verify() const;
-
-    /// print - print global variable.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print global variable to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DIVariable - This is a wrapper for a variable (e.g. parameter, local,
   /// global etc).
   class DIVariable : public DIDescriptor {
+    friend class DIDescriptor;
+    void printInternal(raw_ostream &OS) const;
   public:
     explicit DIVariable(const MDNode *N = 0)
       : DIDescriptor(N) {}
@@ -706,13 +685,7 @@ namespace llvm {
     /// information for an inlined function arguments.
     bool isInlinedFnArgument(const Function *CurFn);
 
-    /// print - print variable.
-    void print(raw_ostream &OS) const;
-
     void printExtendedName(raw_ostream &OS) const;
-
-    /// dump - print variable to dbgs() with a newline.
-    void dump() const;
   };
 
   /// DILexicalBlock - This is a wrapper for a lexical block.
@@ -830,12 +803,6 @@ namespace llvm {
 
     /// Verify - Verify that a derived type descriptor is well formed.
     bool Verify() const;
-
-    /// print - print derived type.
-    void print(raw_ostream &OS) const;
-
-    /// dump - print derived type to dbgs() with a newline.
-    void dump() const;
   };
 
   /// getDISubprogram - Find subprogram that is enclosing this scope.
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index 194aed8b9f..00a2eaadba 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -694,131 +694,139 @@ void DILexicalBlockFile::anchor() { }
 // DIDescriptor: dump routines for all descriptors.
 //===----------------------------------------------------------------------===//
 
+/// dump - Print descriptor to dbgs() with a newline.
+void DIDescriptor::dump() const {
+  print(dbgs()); dbgs() << '\n';
+}
 
 /// print - Print descriptor.
 void DIDescriptor::print(raw_ostream &OS) const {
-  OS << "[" << dwarf::TagString(getTag()) << "] ";
-  OS.write_hex((intptr_t) &*DbgNode) << ']';
+  if (!DbgNode) return;
+
+  OS << "[" << dwarf::TagString(getTag()) << ']';
+
+  if (this->isSubrange()) {
+    DISubrange(DbgNode).printInternal(OS);
+  } else if (this->isScope()) {
+    DIScope(DbgNode).printInternal(OS);
+  } else if (this->isCompileUnit()) {
+    DICompileUnit(DbgNode).printInternal(OS);
+  } else if (this->isFile()) {
+    DIFile(DbgNode).printInternal(OS);
+  } else if (this->isEnumerator()) {
+    DIEnumerator(DbgNode).printInternal(OS);
+  } else if (this->isBasicType()) {
+    DIType(DbgNode).printInternal(OS);
+  } else if (this->isDerivedType()) {
+    DIDerivedType(DbgNode).printInternal(OS);
+  } else if (this->isCompositeType()) {
+    DICompositeType(DbgNode).printInternal(OS);
+  } else if (this->isSubprogram()) {
+    DISubprogram(DbgNode).printInternal(OS);
+  } else if (this->isGlobalVariable()) {
+    DIGlobalVariable(DbgNode).printInternal(OS);
+  } else if (this->isVariable()) {
+    DIVariable(DbgNode).printInternal(OS);
+  }
 }
 
-/// print - Print compile unit.
-void DICompileUnit::print(raw_ostream &OS) const {
-  if (getLanguage())
-    OS << " [" << dwarf::LanguageString(getLanguage()) << "] ";
+void DISubrange::printInternal(raw_ostream &OS) const {
+  OS << " [" << getLo() << ", " << getHi() << ']';
+}
 
-  OS << " [" << getDirectory() << "/" << getFilename() << "]";
+void DIScope::printInternal(raw_ostream &OS) const {
+  OS << " [" << getDirectory() << "/" << getFilename() << ']';
 }
 
-/// print - Print type.
-void DIType::print(raw_ostream &OS) const {
+void DICompileUnit::printInternal(raw_ostream &OS) const {
+  DIScope::printInternal(OS);
+  if (unsigned Lang = getLanguage())
+    OS << " [" << dwarf::LanguageString(Lang) << ']';
+}
+
+void DIEnumerator::printInternal(raw_ostream &OS) const {
+  OS << " [" << getName() << " :: " << getEnumValue() << ']';
+}
+
+void DIType::printInternal(raw_ostream &OS) const {
   if (!DbgNode) return;
 
   StringRef Res = getName();
   if (!Res.empty())
-    OS << " [" << Res << "] ";
+    OS << " [" << Res << "]";
 
-  unsigned Tag = getTag();
-  OS << " [" << dwarf::TagString(Tag) << "] ";
+  // TODO: Print context?
 
-  // TODO : Print context
-  OS << " ["
-         << "line " << getLineNumber() << ", "
-         << getSizeInBits() << " bits, "
-         << getAlignInBits() << " bit alignment, "
-         << getOffsetInBits() << " bit offset"
-         << "] ";
+  OS << " [line " << getLineNumber()
+     << ", size " << getSizeInBits()
+     << ", align " << getAlignInBits()
+     << ", offset " << getOffsetInBits();
+  if (isBasicType())
+    OS << ", enc "
+       << dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding());
+  OS << "]";
 
   if (isPrivate())
-    OS << " [private] ";
+    OS << " [private]";
   else if (isProtected())
-    OS << " [protected] ";
+    OS << " [protected]";
 
   if (isForwardDecl())
-    OS << " [fwd] ";
-
-  if (isBasicType())
-    DIBasicType(DbgNode).print(OS);
-  else if (isDerivedType()) {
-    DIDerivedType DTy = DIDerivedType(DbgNode);
-    DTy.print(OS);
-    DICompositeType CTy = getDICompositeType(DTy);
-    if (CTy.Verify())
-      CTy.print(OS);
-  }
-  else if (isCompositeType())
-    DICompositeType(DbgNode).print(OS);
-  else {
-    OS << "Invalid DIType\n";
-    return;
-  }
-
-  OS << "\n";
+    OS << " [fwd]";
 }
 
-/// print - Print basic type.
-void DIBasicType::print(raw_ostream &OS) const {
-  OS << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
+void DIDerivedType::printInternal(raw_ostream &OS) const {
+  DIType::printInternal(OS);
+  OS << " [from " << getTypeDerivedFrom().getName() << ']';
 }
 
-/// print - Print derived type.
-void DIDerivedType::print(raw_ostream &OS) const {
-  OS << "\n\t Derived From: ";
-  getTypeDerivedFrom().print(OS);
-  OS << "\n\t";
-}
-
-/// print - Print composite type.
-void DICompositeType::print(raw_ostream &OS) const {
+void DICompositeType::printInternal(raw_ostream &OS) const {
+  DIType::printInternal(OS);
   DIArray A = getTypeArray();
   OS << " [" << A.getNumElements() << " elements]";
 }
 
-/// print - Print subprogram.
-void DISubprogram::print(raw_ostream &OS) const {
+void DISubprogram::printInternal(raw_ostream &OS) const {
   StringRef Res = getName();
   if (!Res.empty())
-    OS << " [" << Res << "] ";
-
-  unsigned Tag = getTag();
-  OS << " [" << dwarf::TagString(Tag) << "] ";
+    OS << " [" << Res << ']';
 
   // TODO : Print context
-  OS << " [" << getLineNumber() << "] ";
+
+  OS << " [line " << getLineNumber() << ']';
 
   if (isLocalToUnit())
-    OS << " [local] ";
+    OS << " [local]";
 
   if (isDefinition())
-    OS << " [def] ";
+    OS << " [def]";
 
   if (getScopeLineNumber() != getLineNumber())
-    OS << " [Scope: " << getScopeLineNumber() << "] ";
-
-  OS << "\n";
+    OS << " [scope " << getScopeLineNumber() << "]";
 }
 
-/// print - Print global variable.
-void DIGlobalVariable::print(raw_ostream &OS) const {
-  OS << " [";
+void DIGlobalVariable::printInternal(raw_ostream &OS) const {
   StringRef Res = getName();
   if (!Res.empty())
-    OS << " [" << Res << "] ";
+    OS << " [" << Res << ']';
 
-  unsigned Tag = getTag();
-  OS << " [" << dwarf::TagString(Tag) << "] ";
+  OS << " [line " << getLineNumber() << ']';
 
   // TODO : Print context
-  OS << " [" << getLineNumber() << "] ";
 
   if (isLocalToUnit())
-    OS << " [local] ";
+    OS << " [local]";
 
   if (isDefinition())
-    OS << " [def] ";
+    OS << " [def]";
+}
+
+void DIVariable::printInternal(raw_ostream &OS) const {
+  StringRef Res = getName();
+  if (!Res.empty())
+    OS << " [" << Res << ']';
 
-  if (isGlobalVariable())
-    DIGlobalVariable(DbgNode).print(OS);
-  OS << "]\n";
+  OS << " [line " << getLineNumber() << ']';
 }
 
 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
@@ -857,64 +865,6 @@ void DIVariable::printExtendedName(raw_ostream &OS) const {
   }
 }
 
-/// print - Print variable.
-void DIVariable::print(raw_ostream &OS) const {
-  StringRef Res = getName();
-  if (!Res.empty())
-    OS << " [" << Res << "] ";
-
-  OS << " [" << getLineNumber() << "] ";
-  getType().print(OS);
-  OS << "\n";
-
-  // FIXME: Dump complex addresses
-}
-
-/// dump - Print descriptor to dbgs() with a newline.
-void DIDescriptor::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print compile unit to dbgs() with a newline.
-void DICompileUnit::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print type to dbgs() with a newline.
-void DIType::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print basic type to dbgs() with a newline.
-void DIBasicType::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print derived type to dbgs() with a newline.
-void DIDerivedType::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print composite type to dbgs() with a newline.
-void DICompositeType::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print subprogram to dbgs() with a newline.
-void DISubprogram::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print global variable.
-void DIGlobalVariable::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
-/// dump - Print variable.
-void DIVariable::dump() const {
-  print(dbgs()); dbgs() << '\n';
-}
-
 /// fixupObjcLikeName - Replace contains special characters used
 /// in a typical Objective-C names with '.' in a given string.
 static void fixupObjcLikeName(StringRef Str, SmallVectorImpl<char> &Out) {