DwarfCompileUnit.cpp - remove duplicate includes that already exist in DwarfCompileUnit.h. NFC.

Also remove DIE.h include from DwarfCompileUnit.h and replace with forward declarations.

llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp

@@ -12,18 +12,12 @@
 
 #include "DwarfCompileUnit.h"
 #include "AddressPool.h"
-#include "DwarfDebug.h"
 #include "DwarfExpression.h"
-#include "DwarfUnit.h"
 #include "llvm/ADT/None.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/BinaryFormat/Dwarf.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include "llvm/CodeGen/DIE.h"
-#include "llvm/CodeGen/LexicalScopes.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineOperand.h"
@@ -32,22 +26,16 @@
 #include "llvm/CodeGen/TargetSubtargetInfo.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/DebugInfo.h"
-#include "llvm/IR/DebugInfoMetadata.h"
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/MC/MCSymbolWasm.h"
 #include "llvm/MC/MachineLocation.h"
-#include "llvm/Support/Casting.h"
 #include "llvm/Target/TargetLoweringObjectFile.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
-#include <algorithm>
-#include <cassert>
-#include <cstdint>
 #include <iterator>
-#include <memory>
 #include <string>
 #include <utility>
 

llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h

@@ -22,7 +22,6 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/BinaryFormat/Dwarf.h"
 #include "llvm/CodeGen/DbgEntityHistoryCalculator.h"
-#include "llvm/CodeGen/DIE.h"
 #include "llvm/CodeGen/LexicalScopes.h"
 #include "llvm/IR/DebugInfoMetadata.h"
 #include "llvm/Support/Casting.h"
@@ -34,6 +33,9 @@
 namespace llvm {
 
 class AsmPrinter;
+class DIE;
+class DIELoc;
+class DIEValueList;
 class DwarfFile;
 class GlobalVariable;
 class MCExpr;