Merge llvm 3.5.0 release from ^/vendor/llvm/dist, resolve conflicts, and

preserve our customizations, where necessary.

1 files changed, 279 insertions, 0 deletions

diff --git a/contrib/llvm/lib/Object/IRObjectFile.cpp b/contrib/llvm/lib/Object/IRObjectFile.cpp
new file mode 100644
index 0000000..5323d92
--- /dev/null
+++ b/contrib/llvm/lib/Object/IRObjectFile.cpp
@@ -0,0 +1,279 @@
+//===- 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/Bitcode/ReaderWriter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/GVMaterializer.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/MC/MCParser/MCAsmParser.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(std::unique_ptr<MemoryBuffer> Object,
+                           std::unique_ptr<Module> Mod)
+    : SymbolicFile(Binary::ID_IR, std::move(Object)), M(std::move(Mod)) {
+  // If we have a DataLayout, setup a mangler.
+  const DataLayout *DL = M->getDataLayout();
+  if (!DL)
+    return;
+
+  Mang.reset(new Mangler(DL));
+
+  const std::string &InlineAsm = M->getModuleInlineAsm();
+  if (InlineAsm.empty())
+    return;
+
+  StringRef Triple = M->getTargetTriple();
+  std::string Err;
+  const Target *T = TargetRegistry::lookupTarget(Triple, Err);
+  if (!T)
+    return;
+
+  std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(Triple));
+  if (!MRI)
+    return;
+
+  std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, Triple));
+  if (!MAI)
+    return;
+
+  std::unique_ptr<MCSubtargetInfo> STI(
+      T->createMCSubtargetInfo(Triple, "", ""));
+  if (!STI)
+    return;
+
+  std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
+  if (!MCII)
+    return;
+
+  MCObjectFileInfo MOFI;
+  MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
+  MOFI.InitMCObjectFileInfo(Triple, Reloc::Default, CodeModel::Default, MCCtx);
+  std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
+
+  std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
+  SourceMgr SrcMgr;
+  SrcMgr.AddNewSourceBuffer(Buffer.release(), 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)));
+  }
+}
+
+IRObjectFile::~IRObjectFile() {
+  GVMaterializer *GVM =  M->getMaterializer();
+  if (GVM)
+    GVM->releaseBuffer();
+ }
+
+static const 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) {
+  if (I == M.alias_end())
+    return 3;
+  const GlobalValue *GV = &*I;
+  return reinterpret_cast<uintptr_t>(GV) | 2;
+}
+
+static uintptr_t skipEmpty(Module::const_global_iterator I, const Module &M) {
+  if (I == M.global_end())
+    return skipEmpty(M.alias_begin(), M);
+  const GlobalValue *GV = &*I;
+  return reinterpret_cast<uintptr_t>(GV) | 1;
+}
+
+static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) {
+  if (I == M.end())
+    return skipEmpty(M.global_begin(), M);
+  const GlobalValue *GV = &*I;
+  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);
+  uintptr_t Res;
+
+  switch (Symb.p & 3) {
+  case 0: {
+    Module::const_iterator Iter(static_cast<const Function*>(GV));
+    ++Iter;
+    Res = skipEmpty(Iter, *M);
+    break;
+  }
+  case 1: {
+    Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV));
+    ++Iter;
+    Res = skipEmpty(Iter, *M);
+    break;
+  }
+  case 2: {
+    Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV));
+    ++Iter;
+    Res = skipEmpty(Iter, *M);
+    break;
+  }
+  case 3: {
+    unsigned Index = getAsmSymIndex(Symb);
+    assert(Index < AsmSymbols.size());
+    ++Index;
+    Res = (Index << 2) | 3;
+    break;
+  }
+  }
+
+  Symb.p = Res;
+}
+
+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 object_error::success;;
+  }
+
+  if (Mang)
+    Mang->getNameWithPrefix(OS, GV, false);
+  else
+    OS << GV->getName();
+
+  return object_error::success;
+}
+
+static bool isDeclaration(const GlobalValue &V) {
+  if (V.hasAvailableExternallyLinkage())
+    return true;
+
+  if (V.isMaterializable())
+    return false;
+
+  return V.isDeclaration();
+}
+
+uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
+  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 (isDeclaration(*GV))
+    Res |= BasicSymbolRef::SF_Undefined;
+  if (GV->hasPrivateLinkage())
+    Res |= BasicSymbolRef::SF_FormatSpecific;
+  if (!GV->hasLocalLinkage())
+    Res |= BasicSymbolRef::SF_Global;
+  if (GV->hasCommonLinkage())
+    Res |= BasicSymbolRef::SF_Common;
+  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;
+}
+
+basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
+  Module::const_iterator I = M->begin();
+  DataRefImpl Ret;
+  Ret.p = skipEmpty(I, *M);
+  return basic_symbol_iterator(BasicSymbolRef(Ret, this));
+}
+
+basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
+  DataRefImpl Ret;
+  uint64_t NumAsm = AsmSymbols.size();
+  NumAsm <<= 2;
+  Ret.p = 3 | NumAsm;
+  return basic_symbol_iterator(BasicSymbolRef(Ret, this));
+}
+
+ErrorOr<IRObjectFile *> llvm::object::IRObjectFile::createIRObjectFile(
+    std::unique_ptr<MemoryBuffer> Object, LLVMContext &Context) {
+  ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Object.get(), Context);
+  if (std::error_code EC = MOrErr.getError())
+    return EC;
+
+  std::unique_ptr<Module> M(MOrErr.get());
+  return new IRObjectFile(std::move(Object), std::move(M));
+}