Move DwarfGenerator.cpp to unittests

[djasper]

Summary

So far it creates a test helper and so it should be moved there. It also create a layering cycle between CodeGen and CodeGen/AsmPrinter, which should be avoided.

[bkramer]

The include through ../lib is still ugly, but I believe resolving the cyclic dependency between codegen and asmparser is more important. It also avoids paying the cost of compiling testing code for every LLVM build even though it's not used in LLVM itself.

[djasper]

Submitted as r289044.

lib/CodeGen/CMakeLists.txt

add_llvm_library(LLVMCodeGen
   CodeGen.cpp
   CodeGenPrepare.cpp
   CountingFunctionInserter.cpp
   CriticalAntiDepBreaker.cpp
   DeadMachineInstructionElim.cpp
   DetectDeadLanes.cpp
   DFAPacketizer.cpp
   DwarfEHPrepare.cpp
-  DwarfGenerator.cpp
   EarlyIfConversion.cpp
   EdgeBundles.cpp
   ExecutionDepsFix.cpp
   ExpandISelPseudos.cpp
   ExpandPostRAPseudos.cpp
   FaultMaps.cpp
   FuncletLayout.cpp
   GCMetadata.cpp

unittests/DebugInfo/DWARF/CMakeLists.txt

 set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
   DebugInfoDWARF
   CodeGen
   Core
   MC
   MIRParser
   Support
   Target
   )
 
 set(DebugInfoSources
+  DwarfGenerator.cpp
   DWARFDebugInfoTest.cpp
   DWARFFormValueTest.cpp
   )
 
 add_llvm_unittest(DebugInfoDWARFTests
   ${DebugInfoSources}
   )

unittests/DebugInfo/DWARF/DWARFDebugInfoTest.cpp

 //===- llvm/unittest/DebugInfo/DWARFFormValueTest.cpp ---------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
-#include "../lib/CodeGen/DwarfGenerator.h"
+#include "DwarfGenerator.h"
 #include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h"
 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h"
 #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
 #include "llvm/DebugInfo/DWARF/DWARFUnit.h"
 #include "llvm/Support/Dwarf.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Support/TargetSelect.h"

unittests/DebugInfo/DWARF/DwarfGenerator.h

-//===--- lib/CodeGen/DwarfGenerator.h ---------------------------*- C++ -*-===//
+//===--- unittests/DebugInfo/DWARF/DwarfGenerator.h -------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // A file that can generate DWARF debug info for unit tests.
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFGENERATOR_H
-#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFGENERATOR_H
+#ifndef LLVM_UNITTESTS_DEBUG_INFO_DWARF_DWARFGENERATOR_H
+#define LLVM_UNITTESTS_DEBUG_INFO_DWARF_DWARFGENERATOR_H
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/CodeGen/DIE.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugLine.h"
 #include "llvm/Support/Error.h"
 
 #include <memory>
 #include <string>
public:
   /// \param Path the path to save the ELF file to.
   bool saveFile(StringRef Path);
 };
 
 } // end namespace dwarfgen
 
 } // end namespace llvm
 
-#endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFGENERATOR_H
+#endif // LLVM_UNITTESTS_DEBUG_INFO_DWARF_DWARFGENERATOR_H

unittests/DebugInfo/DWARF/DwarfGenerator.cpp

-//===--- lib/CodeGen/DwarfGenerator.cpp -------------------------*- C++ -*-===//
+//===--- unittests/DebugInfo/DWARF/DwarfGenerator.cpp -----------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
+#include "../lib/CodeGen/AsmPrinter/DwarfStringPool.h"
 #include "DwarfGenerator.h"
-#include "AsmPrinter/DwarfStringPool.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include "llvm/CodeGen/DIE.h"
 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugLine.h"
 #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
 #include "llvm/IR/LegacyPassManagers.h"