This patch is needed to make c++ exceptions work for mips16.

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

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index f47864ad698746be15d54f26b9846e9cfb506997..738f117ad0b8d2e67499bb90cb1e38057cbc78a5 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -15,15 +15,15 @@
 #define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
 
 #include "DIE.h"
-#include "llvm/DebugInfo.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/LexicalScopes.h"
-#include "llvm/MC/MachineLocation.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/StringMap.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/LexicalScopes.h"
+#include "llvm/DebugInfo.h"
+#include "llvm/MC/MachineLocation.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/DebugLoc.h"
 
@@ -188,6 +188,44 @@ public:
   DIType getType() const;
 };
 
+/// \brief Collects and handles information specific to a particular
+/// collection of units.
+class DwarfUnits {
+  // Target of Dwarf emission, used for sizing of abbreviations.
+  AsmPrinter *Asm;
+
+  // Used to uniquely define abbreviations.
+  FoldingSet<DIEAbbrev> *AbbreviationsSet;
+
+  // A list of all the unique abbreviations in use.
+  std::vector<DIEAbbrev *> *Abbreviations;
+
+  // A pointer to all units in the section.
+  SmallVector<CompileUnit *, 1> CUs;
+
+public:
+  DwarfUnits(AsmPrinter *AP, FoldingSet<DIEAbbrev> *AS,
+             std::vector<DIEAbbrev *> *A) :
+    Asm(AP), AbbreviationsSet(AS), Abbreviations(A) {}
+
+  /// \brief Compute the size and offset of a DIE given an incoming Offset.
+  unsigned computeSizeAndOffset(DIE *Die, unsigned Offset);
+
+  /// \brief Compute the size and offset of all the DIEs.
+  void computeSizeAndOffsets();
+
+  /// \brief Define a unique number for the abbreviation.
+  void assignAbbrevNumber(DIEAbbrev &Abbrev);
+
+  /// \brief Add a unit to the list of CUs.
+  void addUnit(CompileUnit *CU) { CUs.push_back(CU); }
+
+  /// \brief Emit all of the units to the section listed with the given
+  /// abbreviation section.
+  void emitUnits(DwarfDebug *, const MCSection *, const MCSection *,
+                 const MCSymbol *);
+};
+
 /// \brief Collects and handles dwarf debug information.
 class DwarfDebug {
   // Target of Dwarf emission.
@@ -309,15 +347,32 @@ class DwarfDebug {
   // table for the same directory as DW_at_comp_dir.
   StringRef CompilationDir;
 
+  // Counter for assigning globally unique IDs for CUs.
+  unsigned GlobalCUIndexCount;
+
+  // Holder for the file specific debug information.
+  DwarfUnits InfoHolder;
+
   // Holders for the various debug information flags that we might need to
   // have exposed. See accessor functions below for description.
+
+  // Whether or not we're emitting info for older versions of gdb on darwin.
   bool IsDarwinGDBCompat;
+
+  // DWARF5 Experimental Options
   bool HasDwarfAccelTables;
-  bool HasDwarfFission;
-private:
+  bool HasSplitDwarf;
 
-  /// \brief Define a unique number for the abbreviation.
-  void assignAbbrevNumber(DIEAbbrev &Abbrev);
+  // Separated Dwarf Variables
+  // In general these will all be for bits that are left in the
+  // original object file, rather than things that are meant
+  // to be in the .dwo sections.
+
+  // The CU left in the original object file for separated debug info.
+  CompileUnit *SkeletonCU;
+  DwarfUnits SkeletonHolder;
+
+private:
 
   void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
 
@@ -344,9 +399,6 @@ private:
   /// \brief Emit initial Dwarf sections with a label at the start of each one.
   void emitSectionLabels();
 
-  /// \brief Recursively Emits a debug information entry.
-  void emitDIE(DIE *Die);
-
   /// \brief Compute the size and offset of a DIE given an incoming Offset.
   unsigned computeSizeAndOffset(DIE *Die, unsigned Offset);
 
@@ -411,6 +463,18 @@ private:
   /// \brief Emit inline info using custom format.
   void emitDebugInlineInfo();
 
+  /// DWARF 5 Experimental Split Dwarf Emitters
+
+  /// \brief Construct the split debug info compile unit for the debug info
+  /// section.
+  CompileUnit *constructSkeletonCU(const MDNode *);
+
+  /// \brief Emit the local split debug info section.
+  void emitSkeletonCU(const MCSection *);
+
+  /// \brief Emit the debug info dwo section.
+  void emitDebugInfoDWO();
+
   /// \brief Create new CompileUnit for the given metadata node with tag
   /// DW_TAG_compile_unit.
   CompileUnit *constructCompileUnit(const MDNode *N);
@@ -504,6 +568,9 @@ public:
   /// string text.
   MCSymbol *getStringPoolEntry(StringRef Str);
 
+  /// \brief Recursively Emits a debug information entry.
+  void emitDIE(DIE *Die);
+
   /// \brief Returns whether or not to limit some of our debug
   /// output to the limitations of darwin gdb.
   bool useDarwinGDBCompat() { return IsDarwinGDBCompat; }
@@ -515,8 +582,8 @@ public:
   bool useDwarfAccelTables() { return HasDwarfAccelTables; }
 
   /// \brief Returns whether or not to change the current debug info for the
-  /// fission proposal support.
-  bool useDwarfFission() { return HasDwarfFission; }
+  /// split dwarf proposal support.
+  bool useSplitDwarf() { return HasSplitDwarf; }
 };
 } // End of namespace llvm