Make provision to have floating point constants in .debug_loc expressions.

[oota-llvm.git] / lib / CodeGen / AsmPrinter / DwarfDebug.h

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 4dc9de4e3ec91fd966177072c77327e5b11b14ab..3635546409267c94e6e6046a91dd19cbccbf0d58 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -68,10 +68,37 @@ typedef struct DotDebugLocEntry {
   MachineLocation Loc;
   const MDNode *Variable;
   bool Merged;
-  DotDebugLocEntry() : Begin(0), End(0), Variable(0), Merged(false) {}
+  bool Constant;
+  enum EntryType {
+    E_Location,
+    E_Integer,
+    E_ConstantFP,
+    E_ConstantInt
+  };
+  enum EntryType EntryKind;
+
+  union {
+    int64_t Int;
+    const ConstantFP *CFP;
+    const ConstantInt *CIP;
+  } Constants;
+  DotDebugLocEntry() 
+    : Begin(0), End(0), Variable(0), Merged(false), 
+      Constant(false) { Constants.Int = 0;}
   DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L,
                    const MDNode *V) 
-    : Begin(B), End(E), Loc(L), Variable(V), Merged(false) {}
+    : Begin(B), End(E), Loc(L), Variable(V), Merged(false), 
+      Constant(false) { Constants.Int = 0; EntryKind = E_Location; }
+  DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, int64_t i)
+    : Begin(B), End(E), Variable(0), Merged(false), 
+      Constant(true) { Constants.Int = i; EntryKind = E_Integer; }
+  DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantFP *FPtr)
+    : Begin(B), End(E), Variable(0), Merged(false), 
+      Constant(true) { Constants.CFP = FPtr; EntryKind = E_ConstantFP; }
+  DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantInt *IPtr)
+    : Begin(B), End(E), Variable(0), Merged(false), 
+      Constant(true) { Constants.CIP = IPtr; EntryKind = E_ConstantInt; }
+
   /// Empty entries are also used as a trigger to emit temp label. Such
   /// labels are referenced is used to find debug_loc offset for a given DIE.
   bool isEmpty() { return Begin == 0 && End == 0; }
@@ -82,6 +109,13 @@ typedef struct DotDebugLocEntry {
     Next->Begin = Begin;
     Merged = true;
   }
+  bool isLocation() const    { return EntryKind == E_Location; }
+  bool isInt() const         { return EntryKind == E_Integer; }
+  bool isConstantFP() const  { return EntryKind == E_ConstantFP; }
+  bool isConstantInt() const { return EntryKind == E_ConstantInt; }
+  int64_t getInt()                    { return Constants.Int; }
+  const ConstantFP *getConstantFP()   { return Constants.CFP; }
+  const ConstantInt *getConstantInt() { return Constants.CIP; }
 } DotDebugLocEntry;
 
 //===----------------------------------------------------------------------===//
@@ -253,6 +287,10 @@ class DwarfDebug {
   DebugLoc PrevInstLoc;
   MCSymbol *PrevLabel;
 
+  /// PrologEndLoc - This location indicates end of function prologue and
+  /// beginning of function body.
+  DebugLoc PrologEndLoc;
+
   struct FunctionDebugFrameInfo {
     unsigned Number;
     std::vector<MachineMove> Moves;
@@ -402,7 +440,8 @@ private:
   /// recordSourceLine - Register a source line with debug info. Returns the
   /// unique label that was emitted and which provides correspondence to
   /// the source line list.
-  void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope);
+  void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope,
+                        unsigned Flags);
   
   /// recordVariableFrameIndex - Record a variable's index.
   void recordVariableFrameIndex(const DbgVariable *V, int Index);