1 files changed, 269 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp b/contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
new file mode 100644
index 0000000..83b4091
--- /dev/null
+++ b/contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
@@ -0,0 +1,269 @@
+//===-- X86MCTargetDesc.cpp - X86 Target Descriptions ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides X86 specific target descriptions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86MCTargetDesc.h"
+#include "InstPrinter/X86ATTInstPrinter.h"
+#include "InstPrinter/X86IntelInstPrinter.h"
+#include "X86MCAsmInfo.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/MC/MCCodeGenInfo.h"
+#include "llvm/MC/MCInstrAnalysis.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MachineLocation.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/TargetRegistry.h"
+
+#if _MSC_VER
+#include <intrin.h>
+#endif
+
+using namespace llvm;
+
+#define GET_REGINFO_MC_DESC
+#include "X86GenRegisterInfo.inc"
+
+#define GET_INSTRINFO_MC_DESC
+#include "X86GenInstrInfo.inc"
+
+#define GET_SUBTARGETINFO_MC_DESC
+#include "X86GenSubtargetInfo.inc"
+
+std::string X86_MC::ParseX86Triple(const Triple &TT) {
+  std::string FS;
+  if (TT.getArch() == Triple::x86_64)
+    FS = "+64bit-mode,-32bit-mode,-16bit-mode";
+  else if (TT.getEnvironment() != Triple::CODE16)
+    FS = "-64bit-mode,+32bit-mode,-16bit-mode";
+  else
+    FS = "-64bit-mode,-32bit-mode,+16bit-mode";
+
+  return FS;
+}
+
+unsigned X86_MC::getDwarfRegFlavour(const Triple &TT, bool isEH) {
+  if (TT.getArch() == Triple::x86_64)
+    return DWARFFlavour::X86_64;
+
+  if (TT.isOSDarwin())
+    return isEH ? DWARFFlavour::X86_32_DarwinEH : DWARFFlavour::X86_32_Generic;
+  if (TT.isOSCygMing())
+    // Unsupported by now, just quick fallback
+    return DWARFFlavour::X86_32_Generic;
+  return DWARFFlavour::X86_32_Generic;
+}
+
+void X86_MC::InitLLVM2SEHRegisterMapping(MCRegisterInfo *MRI) {
+  // FIXME: TableGen these.
+  for (unsigned Reg = X86::NoRegister+1; Reg < X86::NUM_TARGET_REGS; ++Reg) {
+    unsigned SEH = MRI->getEncodingValue(Reg);
+    MRI->mapLLVMRegToSEHReg(Reg, SEH);
+  }
+}
+
+MCSubtargetInfo *X86_MC::createX86MCSubtargetInfo(const Triple &TT,
+                                                  StringRef CPU, StringRef FS) {
+  std::string ArchFS = X86_MC::ParseX86Triple(TT);
+  if (!FS.empty()) {
+    if (!ArchFS.empty())
+      ArchFS = (Twine(ArchFS) + "," + FS).str();
+    else
+      ArchFS = FS;
+  }
+
+  std::string CPUName = CPU;
+  if (CPUName.empty())
+    CPUName = "generic";
+
+  return createX86MCSubtargetInfoImpl(TT, CPUName, ArchFS);
+}
+
+static MCInstrInfo *createX86MCInstrInfo() {
+  MCInstrInfo *X = new MCInstrInfo();
+  InitX86MCInstrInfo(X);
+  return X;
+}
+
+static MCRegisterInfo *createX86MCRegisterInfo(const Triple &TT) {
+  unsigned RA = (TT.getArch() == Triple::x86_64)
+                    ? X86::RIP  // Should have dwarf #16.
+                    : X86::EIP; // Should have dwarf #8.
+
+  MCRegisterInfo *X = new MCRegisterInfo();
+  InitX86MCRegisterInfo(X, RA, X86_MC::getDwarfRegFlavour(TT, false),
+                        X86_MC::getDwarfRegFlavour(TT, true), RA);
+  X86_MC::InitLLVM2SEHRegisterMapping(X);
+  return X;
+}
+
+static MCAsmInfo *createX86MCAsmInfo(const MCRegisterInfo &MRI,
+                                     const Triple &TheTriple) {
+  bool is64Bit = TheTriple.getArch() == Triple::x86_64;
+
+  MCAsmInfo *MAI;
+  if (TheTriple.isOSBinFormatMachO()) {
+    if (is64Bit)
+      MAI = new X86_64MCAsmInfoDarwin(TheTriple);
+    else
+      MAI = new X86MCAsmInfoDarwin(TheTriple);
+  } else if (TheTriple.isOSBinFormatELF()) {
+    // Force the use of an ELF container.
+    MAI = new X86ELFMCAsmInfo(TheTriple);
+  } else if (TheTriple.isWindowsMSVCEnvironment()) {
+    MAI = new X86MCAsmInfoMicrosoft(TheTriple);
+  } else if (TheTriple.isOSCygMing() ||
+             TheTriple.isWindowsItaniumEnvironment()) {
+    MAI = new X86MCAsmInfoGNUCOFF(TheTriple);
+  } else {
+    // The default is ELF.
+    MAI = new X86ELFMCAsmInfo(TheTriple);
+  }
+
+  // Initialize initial frame state.
+  // Calculate amount of bytes used for return address storing
+  int stackGrowth = is64Bit ? -8 : -4;
+
+  // Initial state of the frame pointer is esp+stackGrowth.
+  unsigned StackPtr = is64Bit ? X86::RSP : X86::ESP;
+  MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(
+      nullptr, MRI.getDwarfRegNum(StackPtr, true), -stackGrowth);
+  MAI->addInitialFrameState(Inst);
+
+  // Add return address to move list
+  unsigned InstPtr = is64Bit ? X86::RIP : X86::EIP;
+  MCCFIInstruction Inst2 = MCCFIInstruction::createOffset(
+      nullptr, MRI.getDwarfRegNum(InstPtr, true), stackGrowth);
+  MAI->addInitialFrameState(Inst2);
+
+  return MAI;
+}
+
+static MCCodeGenInfo *createX86MCCodeGenInfo(const Triple &TT, Reloc::Model RM,
+                                             CodeModel::Model CM,
+                                             CodeGenOpt::Level OL) {
+  MCCodeGenInfo *X = new MCCodeGenInfo();
+
+  bool is64Bit = TT.getArch() == Triple::x86_64;
+
+  if (RM == Reloc::Default) {
+    // Darwin defaults to PIC in 64 bit mode and dynamic-no-pic in 32 bit mode.
+    // Win64 requires rip-rel addressing, thus we force it to PIC. Otherwise we
+    // use static relocation model by default.
+    if (TT.isOSDarwin()) {
+      if (is64Bit)
+        RM = Reloc::PIC_;
+      else
+        RM = Reloc::DynamicNoPIC;
+    } else if (TT.isOSWindows() && is64Bit)
+      RM = Reloc::PIC_;
+    else
+      RM = Reloc::Static;
+  }
+
+  // ELF and X86-64 don't have a distinct DynamicNoPIC model.  DynamicNoPIC
+  // is defined as a model for code which may be used in static or dynamic
+  // executables but not necessarily a shared library. On X86-32 we just
+  // compile in -static mode, in x86-64 we use PIC.
+  if (RM == Reloc::DynamicNoPIC) {
+    if (is64Bit)
+      RM = Reloc::PIC_;
+    else if (!TT.isOSDarwin())
+      RM = Reloc::Static;
+  }
+
+  // If we are on Darwin, disallow static relocation model in X86-64 mode, since
+  // the Mach-O file format doesn't support it.
+  if (RM == Reloc::Static && TT.isOSDarwin() && is64Bit)
+    RM = Reloc::PIC_;
+
+  // For static codegen, if we're not already set, use Small codegen.
+  if (CM == CodeModel::Default)
+    CM = CodeModel::Small;
+  else if (CM == CodeModel::JITDefault)
+    // 64-bit JIT places everything in the same buffer except external funcs.
+    CM = is64Bit ? CodeModel::Large : CodeModel::Small;
+
+  X->initMCCodeGenInfo(RM, CM, OL);
+  return X;
+}
+
+static MCInstPrinter *createX86MCInstPrinter(const Triple &T,
+                                             unsigned SyntaxVariant,
+                                             const MCAsmInfo &MAI,
+                                             const MCInstrInfo &MII,
+                                             const MCRegisterInfo &MRI) {
+  if (SyntaxVariant == 0)
+    return new X86ATTInstPrinter(MAI, MII, MRI);
+  if (SyntaxVariant == 1)
+    return new X86IntelInstPrinter(MAI, MII, MRI);
+  return nullptr;
+}
+
+static MCRelocationInfo *createX86MCRelocationInfo(const Triple &TheTriple,
+                                                   MCContext &Ctx) {
+  if (TheTriple.isOSBinFormatMachO() && TheTriple.getArch() == Triple::x86_64)
+    return createX86_64MachORelocationInfo(Ctx);
+  else if (TheTriple.isOSBinFormatELF())
+    return createX86_64ELFRelocationInfo(Ctx);
+  // Default to the stock relocation info.
+  return llvm::createMCRelocationInfo(TheTriple, Ctx);
+}
+
+static MCInstrAnalysis *createX86MCInstrAnalysis(const MCInstrInfo *Info) {
+  return new MCInstrAnalysis(Info);
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeX86TargetMC() {
+  for (Target *T : {&TheX86_32Target, &TheX86_64Target}) {
+    // Register the MC asm info.
+    RegisterMCAsmInfoFn X(*T, createX86MCAsmInfo);
+
+    // Register the MC codegen info.
+    RegisterMCCodeGenInfoFn Y(*T, createX86MCCodeGenInfo);
+
+    // Register the MC instruction info.
+    TargetRegistry::RegisterMCInstrInfo(*T, createX86MCInstrInfo);
+
+    // Register the MC register info.
+    TargetRegistry::RegisterMCRegInfo(*T, createX86MCRegisterInfo);
+
+    // Register the MC subtarget info.
+    TargetRegistry::RegisterMCSubtargetInfo(*T,
+                                            X86_MC::createX86MCSubtargetInfo);
+
+    // Register the MC instruction analyzer.
+    TargetRegistry::RegisterMCInstrAnalysis(*T, createX86MCInstrAnalysis);
+
+    // Register the code emitter.
+    TargetRegistry::RegisterMCCodeEmitter(*T, createX86MCCodeEmitter);
+
+    // Register the object streamer.
+    TargetRegistry::RegisterCOFFStreamer(*T, createX86WinCOFFStreamer);
+
+    // Register the MCInstPrinter.
+    TargetRegistry::RegisterMCInstPrinter(*T, createX86MCInstPrinter);
+
+    // Register the MC relocation info.
+    TargetRegistry::RegisterMCRelocationInfo(*T, createX86MCRelocationInfo);
+  }
+
+  // Register the asm backend.
+  TargetRegistry::RegisterMCAsmBackend(TheX86_32Target,
+                                       createX86_32AsmBackend);
+  TargetRegistry::RegisterMCAsmBackend(TheX86_64Target,
+                                       createX86_64AsmBackend);
+}