1 files changed, 547 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lli/lli.cpp b/contrib/llvm/tools/lli/lli.cpp
new file mode 100644
index 0000000..b6c9299
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+++ b/contrib/llvm/tools/lli/lli.cpp
@@ -0,0 +1,547 @@
+//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This utility provides a simple wrapper around the LLVM Execution Engines,
+// which allow the direct execution of LLVM programs through a Just-In-Time
+// compiler, or through an interpreter if no JIT is available for this platform.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.h"
+#include "llvm/Type.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/LinkAllCodegenComponents.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ExecutionEngine/Interpreter.h"
+#include "llvm/ExecutionEngine/JIT.h"
+#include "llvm/ExecutionEngine/JITEventListener.h"
+#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/ExecutionEngine/MCJIT.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/IRReader.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PluginLoader.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Process.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Support/Memory.h"
+#include <cerrno>
+
+#ifdef __linux__
+// These includes used by LLIMCJITMemoryManager::getPointerToNamedFunction()
+// for Glibc trickery. Look comments in this function for more information.
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#include <fcntl.h>
+#include <unistd.h>
+#endif
+
+#ifdef __CYGWIN__
+#include <cygwin/version.h>
+#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
+#define DO_NOTHING_ATEXIT 1
+#endif
+#endif
+
+using namespace llvm;
+
+namespace {
+  cl::opt<std::string>
+  InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
+
+  cl::list<std::string>
+  InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
+
+  cl::opt<bool> ForceInterpreter("force-interpreter",
+                                 cl::desc("Force interpretation: disable JIT"),
+                                 cl::init(false));
+
+  cl::opt<bool> UseMCJIT(
+    "use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"),
+    cl::init(false));
+
+  // Determine optimization level.
+  cl::opt<char>
+  OptLevel("O",
+           cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
+                    "(default = '-O2')"),
+           cl::Prefix,
+           cl::ZeroOrMore,
+           cl::init(' '));
+
+  cl::opt<std::string>
+  TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
+  cl::opt<std::string>
+  MArch("march",
+        cl::desc("Architecture to generate assembly for (see --version)"));
+
+  cl::opt<std::string>
+  MCPU("mcpu",
+       cl::desc("Target a specific cpu type (-mcpu=help for details)"),
+       cl::value_desc("cpu-name"),
+       cl::init(""));
+
+  cl::list<std::string>
+  MAttrs("mattr",
+         cl::CommaSeparated,
+         cl::desc("Target specific attributes (-mattr=help for details)"),
+         cl::value_desc("a1,+a2,-a3,..."));
+
+  cl::opt<std::string>
+  EntryFunc("entry-function",
+            cl::desc("Specify the entry function (default = 'main') "
+                     "of the executable"),
+            cl::value_desc("function"),
+            cl::init("main"));
+
+  cl::opt<std::string>
+  FakeArgv0("fake-argv0",
+            cl::desc("Override the 'argv[0]' value passed into the executing"
+                     " program"), cl::value_desc("executable"));
+
+  cl::opt<bool>
+  DisableCoreFiles("disable-core-files", cl::Hidden,
+                   cl::desc("Disable emission of core files if possible"));
+
+  cl::opt<bool>
+  NoLazyCompilation("disable-lazy-compilation",
+                  cl::desc("Disable JIT lazy compilation"),
+                  cl::init(false));
+
+  cl::opt<Reloc::Model>
+  RelocModel("relocation-model",
+             cl::desc("Choose relocation model"),
+             cl::init(Reloc::Default),
+             cl::values(
+            clEnumValN(Reloc::Default, "default",
+                       "Target default relocation model"),
+            clEnumValN(Reloc::Static, "static",
+                       "Non-relocatable code"),
+            clEnumValN(Reloc::PIC_, "pic",
+                       "Fully relocatable, position independent code"),
+            clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
+                       "Relocatable external references, non-relocatable code"),
+            clEnumValEnd));
+
+  cl::opt<llvm::CodeModel::Model>
+  CMModel("code-model",
+          cl::desc("Choose code model"),
+          cl::init(CodeModel::JITDefault),
+          cl::values(clEnumValN(CodeModel::JITDefault, "default",
+                                "Target default JIT code model"),
+                     clEnumValN(CodeModel::Small, "small",
+                                "Small code model"),
+                     clEnumValN(CodeModel::Kernel, "kernel",
+                                "Kernel code model"),
+                     clEnumValN(CodeModel::Medium, "medium",
+                                "Medium code model"),
+                     clEnumValN(CodeModel::Large, "large",
+                                "Large code model"),
+                     clEnumValEnd));
+
+  cl::opt<bool>
+  EnableJITExceptionHandling("jit-enable-eh",
+    cl::desc("Emit exception handling information"),
+    cl::init(false));
+
+  cl::opt<bool>
+// In debug builds, make this default to true.
+#ifdef NDEBUG
+#define EMIT_DEBUG false
+#else
+#define EMIT_DEBUG true
+#endif
+  EmitJitDebugInfo("jit-emit-debug",
+    cl::desc("Emit debug information to debugger"),
+    cl::init(EMIT_DEBUG));
+#undef EMIT_DEBUG
+
+  static cl::opt<bool>
+  EmitJitDebugInfoToDisk("jit-emit-debug-to-disk",
+    cl::Hidden,
+    cl::desc("Emit debug info objfiles to disk"),
+    cl::init(false));
+}
+
+static ExecutionEngine *EE = 0;
+
+static void do_shutdown() {
+  // Cygwin-1.5 invokes DLL's dtors before atexit handler.
+#ifndef DO_NOTHING_ATEXIT
+  delete EE;
+  llvm_shutdown();
+#endif
+}
+
+// Memory manager for MCJIT
+class LLIMCJITMemoryManager : public JITMemoryManager {
+public:
+  SmallVector<sys::MemoryBlock, 16> AllocatedDataMem;
+  SmallVector<sys::MemoryBlock, 16> AllocatedCodeMem;
+  SmallVector<sys::MemoryBlock, 16> FreeCodeMem;
+
+  LLIMCJITMemoryManager() { }
+  ~LLIMCJITMemoryManager();
+
+  virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID);
+
+  virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID);
+
+  virtual void *getPointerToNamedFunction(const std::string &Name,
+                                          bool AbortOnFailure = true);
+
+  // Invalidate instruction cache for code sections. Some platforms with
+  // separate data cache and instruction cache require explicit cache flush,
+  // otherwise JIT code manipulations (like resolved relocations) will get to
+  // the data cache but not to the instruction cache.
+  virtual void invalidateInstructionCache();
+
+  // The MCJITMemoryManager doesn't use the following functions, so we don't
+  // need implement them.
+  virtual void setMemoryWritable() {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void setMemoryExecutable() {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void setPoisonMemory(bool poison) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void AllocateGOT() {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual uint8_t *getGOTBase() const {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual uint8_t *startFunctionBody(const Function *F,
+                                     uintptr_t &ActualSize){
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
+                                unsigned Alignment) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart,
+                               uint8_t *FunctionEnd) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual void deallocateFunctionBody(void *Body) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual uint8_t* startExceptionTable(const Function* F,
+                                       uintptr_t &ActualSize) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual void endExceptionTable(const Function *F, uint8_t *TableStart,
+                                 uint8_t *TableEnd, uint8_t* FrameRegister) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void deallocateExceptionTable(void *ET) {
+    llvm_unreachable("Unexpected call!");
+  }
+};
+
+uint8_t *LLIMCJITMemoryManager::allocateDataSection(uintptr_t Size,
+                                                    unsigned Alignment,
+                                                    unsigned SectionID) {
+  if (!Alignment)
+    Alignment = 16;
+  uint8_t *Addr = (uint8_t*)calloc((Size + Alignment - 1)/Alignment, Alignment);
+  AllocatedDataMem.push_back(sys::MemoryBlock(Addr, Size));
+  return Addr;
+}
+
+uint8_t *LLIMCJITMemoryManager::allocateCodeSection(uintptr_t Size,
+                                                    unsigned Alignment,
+                                                    unsigned SectionID) {
+  if (!Alignment)
+    Alignment = 16;
+  unsigned NeedAllocate = Alignment * ((Size + Alignment - 1)/Alignment + 1);
+  uintptr_t Addr = 0;
+  // Look in the list of free code memory regions and use a block there if one
+  // is available.
+  for (int i = 0, e = FreeCodeMem.size(); i != e; ++i) {
+    sys::MemoryBlock &MB = FreeCodeMem[i];
+    if (MB.size() >= NeedAllocate) {
+      Addr = (uintptr_t)MB.base();
+      uintptr_t EndOfBlock = Addr + MB.size();
+      // Align the address.
+      Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1);
+      // Store cutted free memory block.
+      FreeCodeMem[i] = sys::MemoryBlock((void*)(Addr + Size),
+                                        EndOfBlock - Addr - Size);
+      return (uint8_t*)Addr;
+    }
+  }
+
+  // No pre-allocated free block was large enough. Allocate a new memory region.
+  sys::MemoryBlock MB = sys::Memory::AllocateRWX(NeedAllocate, 0, 0);
+
+  AllocatedCodeMem.push_back(MB);
+  Addr = (uintptr_t)MB.base();
+  uintptr_t EndOfBlock = Addr + MB.size();
+  // Align the address.
+  Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1);
+  // The AllocateRWX may allocate much more memory than we need. In this case,
+  // we store the unused memory as a free memory block.
+  unsigned FreeSize = EndOfBlock-Addr-Size;
+  if (FreeSize > 16)
+    FreeCodeMem.push_back(sys::MemoryBlock((void*)(Addr + Size), FreeSize));
+
+  // Return aligned address
+  return (uint8_t*)Addr;
+}
+
+void LLIMCJITMemoryManager::invalidateInstructionCache() {
+  for (int i = 0, e = AllocatedCodeMem.size(); i != e; ++i)
+    sys::Memory::InvalidateInstructionCache(AllocatedCodeMem[i].base(),
+                                            AllocatedCodeMem[i].size());
+}
+
+void *LLIMCJITMemoryManager::getPointerToNamedFunction(const std::string &Name,
+                                                       bool AbortOnFailure) {
+#if defined(__linux__)
+  //===--------------------------------------------------------------------===//
+  // Function stubs that are invoked instead of certain library calls
+  //
+  // Force the following functions to be linked in to anything that uses the
+  // JIT. This is a hack designed to work around the all-too-clever Glibc
+  // strategy of making these functions work differently when inlined vs. when
+  // not inlined, and hiding their real definitions in a separate archive file
+  // that the dynamic linker can't see. For more info, search for
+  // 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
+  if (Name == "stat") return (void*)(intptr_t)&stat;
+  if (Name == "fstat") return (void*)(intptr_t)&fstat;
+  if (Name == "lstat") return (void*)(intptr_t)&lstat;
+  if (Name == "stat64") return (void*)(intptr_t)&stat64;
+  if (Name == "fstat64") return (void*)(intptr_t)&fstat64;
+  if (Name == "lstat64") return (void*)(intptr_t)&lstat64;
+  if (Name == "atexit") return (void*)(intptr_t)&atexit;
+  if (Name == "mknod") return (void*)(intptr_t)&mknod;
+#endif // __linux__
+
+  const char *NameStr = Name.c_str();
+  void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
+  if (Ptr) return Ptr;
+
+  // If it wasn't found and if it starts with an underscore ('_') character,
+  // try again without the underscore.
+  if (NameStr[0] == '_') {
+    Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
+    if (Ptr) return Ptr;
+  }
+
+  if (AbortOnFailure)
+    report_fatal_error("Program used external function '" + Name +
+                      "' which could not be resolved!");
+  return 0;
+}
+
+LLIMCJITMemoryManager::~LLIMCJITMemoryManager() {
+  for (unsigned i = 0, e = AllocatedCodeMem.size(); i != e; ++i)
+    sys::Memory::ReleaseRWX(AllocatedCodeMem[i]);
+  for (unsigned i = 0, e = AllocatedDataMem.size(); i != e; ++i)
+    free(AllocatedDataMem[i].base());
+}
+
+//===----------------------------------------------------------------------===//
+// main Driver function
+//
+int main(int argc, char **argv, char * const *envp) {
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+
+  LLVMContext &Context = getGlobalContext();
+  atexit(do_shutdown);  // Call llvm_shutdown() on exit.
+
+  // If we have a native target, initialize it to ensure it is linked in and
+  // usable by the JIT.
+  InitializeNativeTarget();
+  InitializeNativeTargetAsmPrinter();
+
+  cl::ParseCommandLineOptions(argc, argv,
+                              "llvm interpreter & dynamic compiler\n");
+
+  // If the user doesn't want core files, disable them.
+  if (DisableCoreFiles)
+    sys::Process::PreventCoreFiles();
+
+  // Load the bitcode...
+  SMDiagnostic Err;
+  Module *Mod = ParseIRFile(InputFile, Err, Context);
+  if (!Mod) {
+    Err.print(argv[0], errs());
+    return 1;
+  }
+
+  // If not jitting lazily, load the whole bitcode file eagerly too.
+  std::string ErrorMsg;
+  if (NoLazyCompilation) {
+    if (Mod->MaterializeAllPermanently(&ErrorMsg)) {
+      errs() << argv[0] << ": bitcode didn't read correctly.\n";
+      errs() << "Reason: " << ErrorMsg << "\n";
+      exit(1);
+    }
+  }
+
+  EngineBuilder builder(Mod);
+  builder.setMArch(MArch);
+  builder.setMCPU(MCPU);
+  builder.setMAttrs(MAttrs);
+  builder.setRelocationModel(RelocModel);
+  builder.setCodeModel(CMModel);
+  builder.setErrorStr(&ErrorMsg);
+  builder.setEngineKind(ForceInterpreter
+                        ? EngineKind::Interpreter
+                        : EngineKind::JIT);
+
+  // If we are supposed to override the target triple, do so now.
+  if (!TargetTriple.empty())
+    Mod->setTargetTriple(Triple::normalize(TargetTriple));
+
+  // Enable MCJIT if desired.
+  LLIMCJITMemoryManager *JMM = 0;
+  if (UseMCJIT && !ForceInterpreter) {
+    builder.setUseMCJIT(true);
+    JMM = new LLIMCJITMemoryManager();
+    builder.setJITMemoryManager(JMM);
+  } else {
+    builder.setJITMemoryManager(ForceInterpreter ? 0 :
+                                JITMemoryManager::CreateDefaultMemManager());
+  }
+
+  CodeGenOpt::Level OLvl = CodeGenOpt::Default;
+  switch (OptLevel) {
+  default:
+    errs() << argv[0] << ": invalid optimization level.\n";
+    return 1;
+  case ' ': break;
+  case '0': OLvl = CodeGenOpt::None; break;
+  case '1': OLvl = CodeGenOpt::Less; break;
+  case '2': OLvl = CodeGenOpt::Default; break;
+  case '3': OLvl = CodeGenOpt::Aggressive; break;
+  }
+  builder.setOptLevel(OLvl);
+
+  TargetOptions Options;
+  Options.JITExceptionHandling = EnableJITExceptionHandling;
+  Options.JITEmitDebugInfo = EmitJitDebugInfo;
+  Options.JITEmitDebugInfoToDisk = EmitJitDebugInfoToDisk;
+  builder.setTargetOptions(Options);
+
+  EE = builder.create();
+  if (!EE) {
+    if (!ErrorMsg.empty())
+      errs() << argv[0] << ": error creating EE: " << ErrorMsg << "\n";
+    else
+      errs() << argv[0] << ": unknown error creating EE!\n";
+    exit(1);
+  }
+
+  // Clear instruction cache before code will be executed.
+  if (JMM)
+    JMM->invalidateInstructionCache();
+
+  // The following functions have no effect if their respective profiling
+  // support wasn't enabled in the build configuration.
+  EE->RegisterJITEventListener(
+                JITEventListener::createOProfileJITEventListener());
+  EE->RegisterJITEventListener(
+                JITEventListener::createIntelJITEventListener());
+
+  EE->DisableLazyCompilation(NoLazyCompilation);
+
+  // If the user specifically requested an argv[0] to pass into the program,
+  // do it now.
+  if (!FakeArgv0.empty()) {
+    InputFile = FakeArgv0;
+  } else {
+    // Otherwise, if there is a .bc suffix on the executable strip it off, it
+    // might confuse the program.
+    if (StringRef(InputFile).endswith(".bc"))
+      InputFile.erase(InputFile.length() - 3);
+  }
+
+  // Add the module's name to the start of the vector of arguments to main().
+  InputArgv.insert(InputArgv.begin(), InputFile);
+
+  // Call the main function from M as if its signature were:
+  //   int main (int argc, char **argv, const char **envp)
+  // using the contents of Args to determine argc & argv, and the contents of
+  // EnvVars to determine envp.
+  //
+  Function *EntryFn = Mod->getFunction(EntryFunc);
+  if (!EntryFn) {
+    errs() << '\'' << EntryFunc << "\' function not found in module.\n";
+    return -1;
+  }
+
+  // If the program doesn't explicitly call exit, we will need the Exit
+  // function later on to make an explicit call, so get the function now.
+  Constant *Exit = Mod->getOrInsertFunction("exit", Type::getVoidTy(Context),
+                                                    Type::getInt32Ty(Context),
+                                                    NULL);
+
+  // Reset errno to zero on entry to main.
+  errno = 0;
+
+  // Run static constructors.
+  EE->runStaticConstructorsDestructors(false);
+
+  if (NoLazyCompilation) {
+    for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
+      Function *Fn = &*I;
+      if (Fn != EntryFn && !Fn->isDeclaration())
+        EE->getPointerToFunction(Fn);
+    }
+  }
+
+  // Run main.
+  int Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
+
+  // Run static destructors.
+  EE->runStaticConstructorsDestructors(true);
+
+  // If the program didn't call exit explicitly, we should call it now.
+  // This ensures that any atexit handlers get called correctly.
+  if (Function *ExitF = dyn_cast<Function>(Exit)) {
+    std::vector<GenericValue> Args;
+    GenericValue ResultGV;
+    ResultGV.IntVal = APInt(32, Result);
+    Args.push_back(ResultGV);
+    EE->runFunction(ExitF, Args);
+    errs() << "ERROR: exit(" << Result << ") returned!\n";
+    abort();
+  } else {
+    errs() << "ERROR: exit defined with wrong prototype!\n";
+    abort();
+  }
+}