Elaborate on comment.

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

diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
index 19a6bd9beacf5b884466f5535f81a22d4e8dadc8..3b04e206254b728a41ea55c8399d59442b6d973c 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DIE.h
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -18,15 +18,17 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/Dwarf.h"
+#include "llvm/MC/MCExpr.h"
 #include <vector>
 
 namespace llvm {
   class AsmPrinter;
   class MCSymbol;
+  class MCSymbolRefExpr;
   class raw_ostream;
 
   //===--------------------------------------------------------------------===//
-  /// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
+  /// DIEAbbrevData - Dwarf abbreviation data, describes one attribute of a
   /// Dwarf abbreviation.
   class DIEAbbrevData {
     /// Attribute - Dwarf attribute code.
@@ -86,12 +88,6 @@ namespace llvm {
       Data.push_back(DIEAbbrevData(Attribute, Form));
     }
 
-    /// AddFirstAttribute - Adds a set of attribute information to the front
-    /// of the abbreviation.
-    void AddFirstAttribute(uint16_t Attribute, uint16_t Form) {
-      Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
-    }
-
     /// Profile - Used to gather unique data for the abbreviation folding set.
     ///
     void Profile(FoldingSetNodeID &ID) const;
@@ -135,8 +131,10 @@ namespace llvm {
     ///
     SmallVector<DIEValue*, 12> Values;
 
+#ifndef NDEBUG
     // Private data for print()
     mutable unsigned IndentCount;
+#endif
   public:
     explicit DIE(unsigned Tag)
       : Offset(0), Size(0), Abbrev(Tag, dwarf::DW_CHILDREN_no), Parent(0) {}
@@ -192,6 +190,7 @@ namespace llvm {
     enum {
       isInteger,
       isString,
+      isExpr,
       isLabel,
       isDelta,
       isEntry,
@@ -265,7 +264,35 @@ namespace llvm {
   };
 
   //===--------------------------------------------------------------------===//
-  /// DIELabel - A label expression DIE.
+  /// DIEExpr - An expression DIE.
+  //
+  class DIEExpr : public DIEValue {
+    const MCExpr *Expr;
+  public:
+    explicit DIEExpr(const MCExpr *E) : DIEValue(isExpr), Expr(E) {}
+
+    /// EmitValue - Emit expression value.
+    ///
+    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+
+    /// getValue - Get MCExpr.
+    ///
+    const MCExpr *getValue() const { return Expr; }
+
+    /// SizeOf - Determine size of expression value in bytes.
+    ///
+    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+
+    // Implement isa/cast/dyncast.
+    static bool classof(const DIEValue *E) { return E->getType() == isExpr; }
+
+#ifndef NDEBUG
+    virtual void print(raw_ostream &O) const;
+#endif
+  };
+
+  //===--------------------------------------------------------------------===//
+  /// DIELabel - A label DIE.
   //
   class DIELabel : public DIEValue {
     const MCSymbol *Label;
@@ -278,7 +305,7 @@ namespace llvm {
 
     /// getValue - Get MCSymbol.
     ///
-    const MCSymbol *getValue()       const { return Label; }
+    const MCSymbol *getValue() const { return Label; }
 
     /// SizeOf - Determine size of label value in bytes.
     ///
@@ -338,9 +365,13 @@ namespace llvm {
     /// SizeOf - Determine size of debug information entry in bytes.
     ///
     virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const {
-      return sizeof(int32_t);
+      return Form == dwarf::DW_FORM_ref_addr ? getRefAddrSize(AP) :
+                                               sizeof(int32_t);
     }
 
+    /// Returns size of a ref_addr entry.
+    static unsigned getRefAddrSize(AsmPrinter *AP);
+
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *E) { return E->getType() == isEntry; }