[BOLT][DWARF] Remove option to write to DWP (llvm#100771)

Remove the --write-dwp option as well as related code and tests.

bolt/include/bolt/Rewrite/DWARFRewriter.h

@@ -15,7 +15,6 @@
 #include "bolt/Core/GDBIndex.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/CodeGen/DIE.h"
-#include "llvm/DWP/DWP.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/Support/ToolOutputFile.h"
 #include <cstdint>
@@ -41,13 +40,6 @@ class DWARFRewriter {
  uint64_t TypeHash;
  uint64_t TypeDIERelativeOffset;
  };
- /// Contains information for CU or TU so we can output correct {cu, tu}-index.
- struct UnitMeta {
- uint64_t Offset;
- uint64_t Length;
- uint64_t TUHash;
- };
- using UnitMetaVectorType = std::vector<UnitMeta>;
 
 private:
  BinaryContext &BC;
@@ -194,35 +186,6 @@ class DWARFRewriter {
  const std::string &, DebugLocWriter &,
  DebugStrOffsetsWriter &, DebugStrWriter &);
  using KnownSectionsEntry = std::pair<MCSection *, DWARFSectionKind>;
- struct DWPState {
- std::unique_ptr<ToolOutputFile> Out;
- std::unique_ptr<BinaryContext> TmpBC;
- std::unique_ptr<MCStreamer> Streamer;
- std::unique_ptr<DWPStringPool> Strings;
- /// Used to store String sections for .dwo files if they are being modified.
- std::vector<std::unique_ptr<DebugBufferVector>> StrSections;
- const MCObjectFileInfo *MCOFI = nullptr;
- const DWARFUnitIndex *CUIndex = nullptr;
- std::deque<SmallString<32>> UncompressedSections;
- MapVector<uint64_t, UnitIndexEntry> IndexEntries;
- MapVector<uint64_t, UnitIndexEntry> TypeIndexEntries;
- StringMap<KnownSectionsEntry> KnownSections;
- uint32_t ContributionOffsets[8] = {};
- uint32_t IndexVersion = 2;
- uint64_t DebugInfoSize = 0;
- uint16_t Version = 0;
- bool IsDWP = false;
- };
- /// Init .dwp file
- void initDWPState(DWPState &);
-
- /// Write out .dwp File
- void finalizeDWP(DWPState &);
-
- /// add content of dwo to .dwp file.
- void updateDWP(DWARFUnit &, const OverriddenSectionsMap &, const UnitMeta &,
- UnitMetaVectorType &, DWPState &, DebugLocWriter &,
- DebugStrOffsetsWriter &, DebugStrWriter &);
 };
 
 } // namespace bolt

bolt/lib/Rewrite/CMakeLists.txt

@@ -1,7 +1,6 @@
 set(LLVM_LINK_COMPONENTS
  Core
  DebugInfoDWARF
- DWP
  JITLink
  MC
  Object