1 files changed, 140 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Object/IRObjectFile.cpp b/contrib/llvm/lib/Object/IRObjectFile.cpp
new file mode 100644
index 000000000000..adbf0de6d1bc
--- /dev/null
+++ b/contrib/llvm/lib/Object/IRObjectFile.cpp
@@ -0,0 +1,140 @@
+//===- IRObjectFile.cpp - IR object file implementation ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Part of the IRObjectFile class implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/IRObjectFile.h"
+#include "RecordStreamer.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Bitcode/BitcodeReader.h"
+#include "llvm/IR/GVMaterializer.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCParser/MCTargetAsmParser.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+using namespace object;
+
+IRObjectFile::IRObjectFile(MemoryBufferRef Object,
+                           std::vector<std::unique_ptr<Module>> Mods)
+    : SymbolicFile(Binary::ID_IR, Object), Mods(std::move(Mods)) {
+  for (auto &M : this->Mods)
+    SymTab.addModule(M.get());
+}
+
+IRObjectFile::~IRObjectFile() {}
+
+static ModuleSymbolTable::Symbol getSym(DataRefImpl &Symb) {
+  return *reinterpret_cast<ModuleSymbolTable::Symbol *>(Symb.p);
+}
+
+void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
+  Symb.p += sizeof(ModuleSymbolTable::Symbol);
+}
+
+std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
+                                              DataRefImpl Symb) const {
+  SymTab.printSymbolName(OS, getSym(Symb));
+  return std::error_code();
+}
+
+uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
+  return SymTab.getSymbolFlags(getSym(Symb));
+}
+
+basic_symbol_iterator IRObjectFile::symbol_begin() const {
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(SymTab.symbols().data());
+  return basic_symbol_iterator(BasicSymbolRef(Ret, this));
+}
+
+basic_symbol_iterator IRObjectFile::symbol_end() const {
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(SymTab.symbols().data() +
+                                      SymTab.symbols().size());
+  return basic_symbol_iterator(BasicSymbolRef(Ret, this));
+}
+
+StringRef IRObjectFile::getTargetTriple() const {
+  // Each module must have the same target triple, so we arbitrarily access the
+  // first one.
+  return Mods[0]->getTargetTriple();
+}
+
+ErrorOr<MemoryBufferRef> IRObjectFile::findBitcodeInObject(const ObjectFile &Obj) {
+  for (const SectionRef &Sec : Obj.sections()) {
+    if (Sec.isBitcode()) {
+      StringRef SecContents;
+      if (std::error_code EC = Sec.getContents(SecContents))
+        return EC;
+      return MemoryBufferRef(SecContents, Obj.getFileName());
+    }
+  }
+
+  return object_error::bitcode_section_not_found;
+}
+
+ErrorOr<MemoryBufferRef> IRObjectFile::findBitcodeInMemBuffer(MemoryBufferRef Object) {
+  sys::fs::file_magic Type = sys::fs::identify_magic(Object.getBuffer());
+  switch (Type) {
+  case sys::fs::file_magic::bitcode:
+    return Object;
+  case sys::fs::file_magic::elf_relocatable:
+  case sys::fs::file_magic::macho_object:
+  case sys::fs::file_magic::coff_object: {
+    Expected<std::unique_ptr<ObjectFile>> ObjFile =
+        ObjectFile::createObjectFile(Object, Type);
+    if (!ObjFile)
+      return errorToErrorCode(ObjFile.takeError());
+    return findBitcodeInObject(*ObjFile->get());
+  }
+  default:
+    return object_error::invalid_file_type;
+  }
+}
+
+Expected<std::unique_ptr<IRObjectFile>>
+IRObjectFile::create(MemoryBufferRef Object, LLVMContext &Context) {
+  ErrorOr<MemoryBufferRef> BCOrErr = findBitcodeInMemBuffer(Object);
+  if (!BCOrErr)
+    return errorCodeToError(BCOrErr.getError());
+
+  Expected<std::vector<BitcodeModule>> BMsOrErr =
+      getBitcodeModuleList(*BCOrErr);
+  if (!BMsOrErr)
+    return BMsOrErr.takeError();
+
+  std::vector<std::unique_ptr<Module>> Mods;
+  for (auto BM : *BMsOrErr) {
+    Expected<std::unique_ptr<Module>> MOrErr =
+        BM.getLazyModule(Context, /*ShouldLazyLoadMetadata*/ true,
+                         /*IsImporting*/ false);
+    if (!MOrErr)
+      return MOrErr.takeError();
+
+    Mods.push_back(std::move(*MOrErr));
+  }
+
+  return std::unique_ptr<IRObjectFile>(
+      new IRObjectFile(*BCOrErr, std::move(Mods)));
+}