X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FObject%2FIRObjectFile.cpp;h=dcd385a17807279c2d21db5092c69309954b26aa;hb=4db6dc51b048994a891f983f192b44792305d595;hp=57c2232d47215ddd3e307feefac16460abe0fdff;hpb=5c792faa0e5560bc148c973f3df658eb3bb2061e;p=oota-llvm.git

diff --git a/lib/Object/IRObjectFile.cpp b/lib/Object/IRObjectFile.cpp
index 57c2232d472..dcd385a1780 100644
--- a/lib/Object/IRObjectFile.cpp
+++ b/lib/Object/IRObjectFile.cpp
@@ -11,35 +11,114 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Object/IRObjectFile.h"
+#include "RecordStreamer.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/GVMaterializer.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Mangler.h"
 #include "llvm/IR/Module.h"
-#include "llvm/Object/IRObjectFile.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/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCTargetAsmParser.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;
-using std::error_code;
 
-IRObjectFile::IRObjectFile(MemoryBuffer *Object, error_code &EC,
-                           LLVMContext &Context, bool BufferOwned)
-    : SymbolicFile(Binary::ID_IR, Object, BufferOwned) {
-  ErrorOr<Module*> MOrErr = parseBitcodeFile(Object, Context);
-  if ((EC = MOrErr.getError()))
+IRObjectFile::IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> Mod)
+    : SymbolicFile(Binary::ID_IR, Object), M(std::move(Mod)) {
+  Mang.reset(new Mangler());
+
+  const std::string &InlineAsm = M->getModuleInlineAsm();
+  if (InlineAsm.empty())
+    return;
+
+  Triple TT(M->getTargetTriple());
+  std::string Err;
+  const Target *T = TargetRegistry::lookupTarget(TT.str(), Err);
+  if (!T)
+    return;
+
+  std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(TT.str()));
+  if (!MRI)
+    return;
+
+  std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, TT.str()));
+  if (!MAI)
     return;
 
-  M.reset(MOrErr.get());
+  std::unique_ptr<MCSubtargetInfo> STI(
+      T->createMCSubtargetInfo(TT.str(), "", ""));
+  if (!STI)
+    return;
 
-  // If we have a DataLayout, setup a mangler.
-  const DataLayout *DL = M->getDataLayout();
-  if (!DL)
+  std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
+  if (!MCII)
     return;
 
-  Mang.reset(new Mangler(DL));
+  MCObjectFileInfo MOFI;
+  MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
+  MOFI.InitMCObjectFileInfo(TT, Reloc::Default, CodeModel::Default, MCCtx);
+  std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
+  T->createNullTargetStreamer(*Streamer);
+
+  std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
+  SourceMgr SrcMgr;
+  SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
+  std::unique_ptr<MCAsmParser> Parser(
+      createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));
+
+  MCTargetOptions MCOptions;
+  std::unique_ptr<MCTargetAsmParser> TAP(
+      T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
+  if (!TAP)
+    return;
+
+  Parser->setTargetParser(*TAP);
+  if (Parser->Run(false))
+    return;
+
+  for (auto &KV : *Streamer) {
+    StringRef Key = KV.first();
+    RecordStreamer::State Value = KV.second;
+    uint32_t Res = BasicSymbolRef::SF_None;
+    switch (Value) {
+    case RecordStreamer::NeverSeen:
+      llvm_unreachable("foo");
+    case RecordStreamer::DefinedGlobal:
+      Res |= BasicSymbolRef::SF_Global;
+      break;
+    case RecordStreamer::Defined:
+      break;
+    case RecordStreamer::Global:
+    case RecordStreamer::Used:
+      Res |= BasicSymbolRef::SF_Undefined;
+      Res |= BasicSymbolRef::SF_Global;
+      break;
+    }
+    AsmSymbols.push_back(
+        std::make_pair<std::string, uint32_t>(Key, std::move(Res)));
+  }
 }
 
-static const GlobalValue &getGV(DataRefImpl &Symb) {
-  return *reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
+IRObjectFile::~IRObjectFile() {
+ }
+
+static GlobalValue *getGV(DataRefImpl &Symb) {
+  if ((Symb.p & 3) == 3)
+    return nullptr;
+
+  return reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
 }
 
 static uintptr_t skipEmpty(Module::const_alias_iterator I, const Module &M) {
@@ -63,70 +142,111 @@ static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) {
   return reinterpret_cast<uintptr_t>(GV) | 0;
 }
 
+static unsigned getAsmSymIndex(DataRefImpl Symb) {
+  assert((Symb.p & uintptr_t(3)) == 3);
+  uintptr_t Index = Symb.p & ~uintptr_t(3);
+  Index >>= 2;
+  return Index;
+}
+
 void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
-  const GlobalValue *GV = &getGV(Symb);
-  const Module &M = *GV->getParent();
+  const GlobalValue *GV = getGV(Symb);
   uintptr_t Res;
+
   switch (Symb.p & 3) {
   case 0: {
     Module::const_iterator Iter(static_cast<const Function*>(GV));
     ++Iter;
-    Res = skipEmpty(Iter, M);
+    Res = skipEmpty(Iter, *M);
     break;
   }
   case 1: {
     Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV));
     ++Iter;
-    Res = skipEmpty(Iter, M);
+    Res = skipEmpty(Iter, *M);
     break;
   }
   case 2: {
     Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV));
     ++Iter;
-    Res = skipEmpty(Iter, M);
+    Res = skipEmpty(Iter, *M);
     break;
   }
-  case 3:
-    llvm_unreachable("Invalid symbol reference");
+  case 3: {
+    unsigned Index = getAsmSymIndex(Symb);
+    assert(Index < AsmSymbols.size());
+    ++Index;
+    Res = (Index << 2) | 3;
+    break;
+  }
+  default:
+    llvm_unreachable("unreachable case");
   }
 
   Symb.p = Res;
 }
 
-error_code IRObjectFile::printSymbolName(raw_ostream &OS,
-                                         DataRefImpl Symb) const {
-  const GlobalValue &GV = getGV(Symb);
+std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
+                                              DataRefImpl Symb) const {
+  const GlobalValue *GV = getGV(Symb);
+  if (!GV) {
+    unsigned Index = getAsmSymIndex(Symb);
+    assert(Index <= AsmSymbols.size());
+    OS << AsmSymbols[Index].first;
+    return std::error_code();
+  }
+
+  if (GV->hasDLLImportStorageClass())
+    OS << "__imp_";
 
   if (Mang)
-    Mang->getNameWithPrefix(OS, &GV, false);
+    Mang->getNameWithPrefix(OS, GV, false);
   else
-    OS << GV.getName();
+    OS << GV->getName();
 
-  return object_error::success;
+  return std::error_code();
 }
 
 uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
-  const GlobalValue &GV = getGV(Symb);
+  const GlobalValue *GV = getGV(Symb);
+
+  if (!GV) {
+    unsigned Index = getAsmSymIndex(Symb);
+    assert(Index <= AsmSymbols.size());
+    return AsmSymbols[Index].second;
+  }
 
   uint32_t Res = BasicSymbolRef::SF_None;
-  if (GV.isDeclaration() || GV.hasAvailableExternallyLinkage())
+  if (GV->isDeclarationForLinker())
     Res |= BasicSymbolRef::SF_Undefined;
-  if (GV.hasPrivateLinkage())
+  else if (GV->hasHiddenVisibility() && !GV->hasLocalLinkage())
+    Res |= BasicSymbolRef::SF_Hidden;
+  if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) {
+    if (GVar->isConstant())
+      Res |= BasicSymbolRef::SF_Const;
+  }
+  if (GV->hasPrivateLinkage())
     Res |= BasicSymbolRef::SF_FormatSpecific;
-  if (!GV.hasLocalLinkage())
+  if (!GV->hasLocalLinkage())
     Res |= BasicSymbolRef::SF_Global;
-  if (GV.hasCommonLinkage())
+  if (GV->hasCommonLinkage())
     Res |= BasicSymbolRef::SF_Common;
-  if (GV.hasLinkOnceLinkage() || GV.hasWeakLinkage())
+  if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage())
     Res |= BasicSymbolRef::SF_Weak;
 
+  if (GV->getName().startswith("llvm."))
+    Res |= BasicSymbolRef::SF_FormatSpecific;
+  else if (auto *Var = dyn_cast<GlobalVariable>(GV)) {
+    if (Var->getSection() == StringRef("llvm.metadata"))
+      Res |= BasicSymbolRef::SF_FormatSpecific;
+  }
+
   return Res;
 }
 
-const GlobalValue &IRObjectFile::getSymbolGV(DataRefImpl Symb) const {
-  const GlobalValue &GV = getGV(Symb);
-  return GV;
-}
+GlobalValue *IRObjectFile::getSymbolGV(DataRefImpl Symb) { return getGV(Symb); }
+
+std::unique_ptr<Module> IRObjectFile::takeModule() { return std::move(M); }
 
 basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
   Module::const_iterator I = M->begin();
@@ -137,16 +257,63 @@ basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
 
 basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
   DataRefImpl Ret;
-  Ret.p = 3;
+  uint64_t NumAsm = AsmSymbols.size();
+  NumAsm <<= 2;
+  Ret.p = 3 | NumAsm;
   return basic_symbol_iterator(BasicSymbolRef(Ret, this));
 }
 
-ErrorOr<SymbolicFile *> llvm::object::SymbolicFile::createIRObjectFile(
-    MemoryBuffer *Object, LLVMContext &Context, bool BufferOwned) {
-  error_code EC;
-  std::unique_ptr<IRObjectFile> Ret(
-      new IRObjectFile(Object, EC, Context, BufferOwned));
-  if (EC)
+ErrorOr<MemoryBufferRef> IRObjectFile::findBitcodeInObject(const ObjectFile &Obj) {
+  for (const SectionRef &Sec : Obj.sections()) {
+    StringRef SecName;
+    if (std::error_code EC = Sec.getName(SecName))
+      return EC;
+    if (SecName == ".llvmbc") {
+      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: {
+    ErrorOr<std::unique_ptr<ObjectFile>> ObjFile =
+        ObjectFile::createObjectFile(Object, Type);
+    if (!ObjFile)
+      return ObjFile.getError();
+    return findBitcodeInObject(*ObjFile->get());
+  }
+  default:
+    return object_error::invalid_file_type;
+  }
+}
+
+ErrorOr<std::unique_ptr<IRObjectFile>>
+llvm::object::IRObjectFile::create(MemoryBufferRef Object,
+                                   LLVMContext &Context) {
+  ErrorOr<MemoryBufferRef> BCOrErr = findBitcodeInMemBuffer(Object);
+  if (!BCOrErr)
+    return BCOrErr.getError();
+
+  std::unique_ptr<MemoryBuffer> Buff(
+      MemoryBuffer::getMemBuffer(BCOrErr.get(), false));
+
+  ErrorOr<std::unique_ptr<Module>> MOrErr =
+      getLazyBitcodeModule(std::move(Buff), Context, nullptr,
+                           /*ShouldLazyLoadMetadata*/ true);
+  if (std::error_code EC = MOrErr.getError())
     return EC;
-  return Ret.release();
+
+  std::unique_ptr<Module> &M = MOrErr.get();
+  return llvm::make_unique<IRObjectFile>(Object, std::move(M));
 }