make MachineFunction keep track of its ID and make

[oota-llvm.git] / include / llvm / CodeGen / MachineModuleInfo.h

diff --git a/include/llvm/CodeGen/MachineModuleInfo.h b/include/llvm/CodeGen/MachineModuleInfo.h
index 1872bd26d8aac5ed6b7e62d289f1d917252105cf..d36502985a59f4475d98f5ed7dbe35962a23297a 100644 (file)
--- a/include/llvm/CodeGen/MachineModuleInfo.h
+++ b/include/llvm/CodeGen/MachineModuleInfo.h
@@ -32,7 +32,7 @@
 #define LLVM_CODEGEN_MACHINEMODULEINFO_H
 
 #include "llvm/Support/Dwarf.h"
-#include "llvm/Support/DataTypes.h"
+#include "llvm/System/DataTypes.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/UniqueVector.h"
@@ -42,18 +42,33 @@
 #include "llvm/CodeGen/MachineLocation.h"
 #include "llvm/GlobalValue.h"
 #include "llvm/Pass.h"
+#include "llvm/Metadata.h"
+#include "llvm/Support/ValueHandle.h"
 
 namespace llvm {
 
 //===----------------------------------------------------------------------===//
 // Forward declarations.
 class Constant;
+class MDNode;
 class GlobalVariable;
 class MachineBasicBlock;
 class MachineFunction;
 class Module;
 class PointerType;
 class StructType;
+  
+  
+/// MachineModuleInfoImpl - This class can be derived from and used by targets
+/// to hold private target-specific information for each Module.  Objects of
+/// type are accessed/created with MMI::getInfo and destroyed when the
+/// MachineModuleInfo is destroyed.
+class MachineModuleInfoImpl {
+public:
+  virtual ~MachineModuleInfoImpl();
+};
+  
+  
 
 //===----------------------------------------------------------------------===//
 /// LandingPadInfo - This structure is used to retain landing pad info for
@@ -80,7 +95,11 @@ struct LandingPadInfo {
 /// schemes and reformated for specific use.
 ///
 class MachineModuleInfo : public ImmutablePass {
-private:
+  /// ObjFileMMI - This is the object-file-format-specific implementation of
+  /// MachineModuleInfoImpl, which lets targets accumulate whatever info they
+  /// want.
+  MachineModuleInfoImpl *ObjFileMMI;
+
   // LabelIDList - One entry per assigned label.  Normally the entry is equal to
   // the list index(+1).  If the entry is zero then the label has been deleted.
   // Any other value indicates the label has been deleted by is mapped to
@@ -112,41 +131,55 @@ private:
   // common EH frames.
   std::vector<Function *> Personalities;
 
-  // UsedFunctions - the functions in the llvm.used list in a more easily
-  // searchable format.
+  /// UsedFunctions - The functions in the @llvm.used list in a more easily
+  /// searchable format.  This does not include the functions in
+  /// llvm.compiler.used.
   SmallPtrSet<const Function *, 32> UsedFunctions;
 
-  /// UsedDbgLabels - labels are used by debug info entries.
-  SmallSet<unsigned, 8> UsedDbgLabels;
-
   bool CallsEHReturn;
   bool CallsUnwindInit;
  
   /// DbgInfoAvailable - True if debugging information is available
   /// in this module.
   bool DbgInfoAvailable;
+
 public:
   static char ID; // Pass identification, replacement for typeid
 
+  typedef std::pair<unsigned, TrackingVH<MDNode> > UnsignedAndMDNodePair;
+  typedef SmallVector< std::pair<TrackingVH<MDNode>, UnsignedAndMDNodePair>, 4>
+    VariableDbgInfoMapTy;
+  VariableDbgInfoMapTy VariableDbgInfo;
+
   MachineModuleInfo();
   ~MachineModuleInfo();
   
-  /// doInitialization - Initialize the state for a new module.
-  ///
   bool doInitialization();
-  
-  /// doFinalization - Tear down the state after completion of a module.
-  ///
   bool doFinalization();
-  
+
   /// BeginFunction - Begin gathering function meta information.
   ///
-  void BeginFunction(MachineFunction *MF);
+  void BeginFunction(MachineFunction *) {}
   
   /// EndFunction - Discard function meta information.
   ///
   void EndFunction();
 
+  /// getInfo - Keep track of various per-function pieces of information for
+  /// backends that would like to do so.
+  ///
+  template<typename Ty>
+  Ty &getObjFileInfo() {
+    if (ObjFileMMI == 0)
+      ObjFileMMI = new Ty(*this);
+    return *static_cast<Ty*>(ObjFileMMI);
+  }
+  
+  template<typename Ty>
+  const Ty &getObjFileInfo() const {
+    return const_cast<MachineModuleInfo*>(this)->getObjFileInfo<Ty>();
+  }
+  
   /// AnalyzeModule - Scan the module for global debug information.
   ///
   void AnalyzeModule(Module &M);
@@ -194,19 +227,6 @@ public:
     return LabelID ? LabelIDList[LabelID - 1] : 0;
   }
 
-  /// isDbgLabelUsed - Return true if label with LabelID is used by
-  /// DwarfWriter.
-  bool isDbgLabelUsed(unsigned LabelID) {
-    return UsedDbgLabels.count(LabelID);
-  }
-  
-  /// RecordUsedDbgLabel - Mark label with LabelID as used. This is used
-  /// by DwarfWriter to inform DebugLabelFolder that certain labels are
-  /// not to be deleted.
-  void RecordUsedDbgLabel(unsigned LabelID) {
-    UsedDbgLabels.insert(LabelID);
-  }
-
   /// getFrameMoves - Returns a reference to a list of moves done in the current
   /// function's prologue.  Used to construct frame maps for debug and exception
   /// handling comsumers.
@@ -240,9 +260,11 @@ public:
     return Personalities;
   }
 
-  // UsedFunctions - Return set of the functions in the llvm.used list.
-  const SmallPtrSet<const Function *, 32>& getUsedFunctions() const {
-    return UsedFunctions;
+  /// isUsedFunction - Return true if the functions in the llvm.used list.  This
+  /// does not return true for things in llvm.compiler.used unless they are also
+  /// in llvm.used.
+  bool isUsedFunction(const Function *F) {
+    return UsedFunctions.count(F);
   }
 
   /// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
@@ -293,6 +315,14 @@ public:
   /// of one is required to emit exception handling info.
   Function *getPersonality() const;
 
+  /// setVariableDbgInfo - Collect information used to emit debugging information
+  /// of a variable.
+  void setVariableDbgInfo(MDNode *N, unsigned Slot, MDNode *Scope) {
+    VariableDbgInfo.push_back(std::make_pair(N, std::make_pair(Slot, Scope)));
+  }
+
+  VariableDbgInfoMapTy &getVariableDbgInfo() {  return VariableDbgInfo;  }
+
 }; // End class MachineModuleInfo
 
 } // End llvm namespace