From b1e66d0c4fed6f162424fd5257cedf0d2e705152 Mon Sep 17 00:00:00 2001
From: Eric Christopher <echristo@gmail.com>
Date: Sat, 15 Dec 2012 00:04:07 +0000
Subject: [PATCH] To simplify some code move the unit emission into the
 holders. Make emitDIE public accordingly. No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170258 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 43 ++++++++++++++++-----------
 lib/CodeGen/AsmPrinter/DwarfDebug.h   | 14 +++++----
 2 files changed, 34 insertions(+), 23 deletions(-)

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 6c99d9591ee..73502f21537 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1814,16 +1814,22 @@ void DwarfDebug::emitDIE(DIE *Die) {
   }
 }
 
-void DwarfDebug::emitCompileUnits(const MCSection *Section) {
-  Asm->OutStreamer.SwitchSection(Section);
-  for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
-         E = CUMap.end(); I != E; ++I) {
-    CompileUnit *TheCU = I->second;
+// Emit the various dwarf units to the unit section USection with
+// the abbreviations going into ASection.
+void DwarfUnits::emitUnits(DwarfDebug *DD,
+                           const MCSection *USection,
+                           const MCSection *ASection,
+                           const MCSymbol *ASectionSym) {
+  Asm->OutStreamer.SwitchSection(USection);
+  for (SmallVector<CompileUnit *, 1>::iterator I = CUs.begin(),
+         E = CUs.end(); I != E; ++I) {
+    CompileUnit *TheCU = *I;
     DIE *Die = TheCU->getCUDie();
 
     // Emit the compile units header.
-    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol(Section->getLabelBeginName(),
-                                                  TheCU->getUniqueID()));
+    Asm->OutStreamer
+      .EmitLabel(Asm->GetTempSymbol(USection->getLabelBeginName(),
+                                    TheCU->getUniqueID()));
 
     // Emit size of content not including length itself
     unsigned ContentSize = Die->getSize() +
@@ -1836,24 +1842,24 @@ void DwarfDebug::emitCompileUnits(const MCSection *Section) {
     Asm->OutStreamer.AddComment("DWARF version number");
     Asm->EmitInt16(dwarf::DWARF_VERSION);
     Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");
-    const MCSection *ASec = Asm->getObjFileLowering().getDwarfAbbrevSection();
-    Asm->EmitSectionOffset(Asm->GetTempSymbol(ASec->getLabelBeginName()),
-                           DwarfAbbrevSectionSym);
+    Asm->EmitSectionOffset(Asm->GetTempSymbol(ASection->getLabelBeginName()),
+                           ASectionSym);
     Asm->OutStreamer.AddComment("Address Size (in bytes)");
     Asm->EmitInt8(Asm->getDataLayout().getPointerSize());
 
-    emitDIE(Die);
-    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol(Section->getLabelEndName(),
+    DD->emitDIE(Die);
+    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol(USection->getLabelEndName(),
                                                   TheCU->getUniqueID()));
   }
 }
 
 // Emit the debug info section.
 void DwarfDebug::emitDebugInfo() {
-  if (!useSplitDwarf())
-    emitCompileUnits(Asm->getObjFileLowering().getDwarfInfoSection());
-  else
-    emitSkeletonCU(Asm->getObjFileLowering().getDwarfInfoSection());
+  DwarfUnits &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder;
+
+  Holder.emitUnits(this, Asm->getObjFileLowering().getDwarfInfoSection(),
+                   Asm->getObjFileLowering().getDwarfAbbrevSection(),
+                   DwarfAbbrevSectionSym);
 }
 
 // Emit the abbreviation section.
@@ -2392,5 +2398,8 @@ void DwarfDebug::emitSkeletonCU(const MCSection *Section) {
 // compile units that would normally be in debug_info.
 void DwarfDebug::emitDebugInfoDWO() {
   assert(useSplitDwarf() && "No split dwarf debug info?");
-  emitCompileUnits(Asm->getObjFileLowering().getDwarfInfoDWOSection());
+  // FIXME for Abbrev DWO.
+  InfoHolder.emitUnits(this, Asm->getObjFileLowering().getDwarfInfoDWOSection(),
+                       Asm->getObjFileLowering().getDwarfAbbrevSection(),
+                       DwarfAbbrevSectionSym);
 }
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index c03915aad12..738f117ad0b 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -219,6 +219,11 @@ public:
 
   /// \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.
@@ -394,9 +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);
 
@@ -417,9 +419,6 @@ private:
   /// open.
   void endSections();
 
-  /// \brief Emit all of the compile units to the target section.
-  void emitCompileUnits(const MCSection *);
-
   /// \brief Emit the debug info section.
   void emitDebugInfo();
 
@@ -569,6 +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; }
-- 
2.34.1