Restoring authorship annotation for <[email protected]>. Commit 2 of 2.

1 files changed, 498 insertions, 498 deletions

diff --git a/contrib/libs/llvm12/lib/Object/ELFObjectFile.cpp b/contrib/libs/llvm12/lib/Object/ELFObjectFile.cpp
index 81037e1259f..91871a6255d 100644
--- a/contrib/libs/llvm12/lib/Object/ELFObjectFile.cpp
+++ b/contrib/libs/llvm12/lib/Object/ELFObjectFile.cpp
@@ -1,361 +1,361 @@
-//===- ELFObjectFile.cpp - ELF object file implementation -----------------===// 
-// 
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 
-// See https://llvm.org/LICENSE.txt for license information. 
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 
-// 
-//===----------------------------------------------------------------------===// 
-// 
-// Part of the ELFObjectFile class implementation. 
-// 
-//===----------------------------------------------------------------------===// 
- 
-#include "llvm/Object/ELFObjectFile.h" 
-#include "llvm/ADT/Triple.h" 
-#include "llvm/BinaryFormat/ELF.h" 
-#include "llvm/MC/MCInstrAnalysis.h" 
-#include "llvm/MC/SubtargetFeature.h" 
-#include "llvm/Object/ELF.h" 
-#include "llvm/Object/ELFTypes.h" 
-#include "llvm/Object/Error.h" 
-#include "llvm/Support/ARMAttributeParser.h" 
-#include "llvm/Support/ARMBuildAttributes.h" 
-#include "llvm/Support/Endian.h" 
-#include "llvm/Support/ErrorHandling.h" 
-#include "llvm/Support/MathExtras.h" 
-#include "llvm/Support/RISCVAttributeParser.h" 
-#include "llvm/Support/RISCVAttributes.h" 
-#include "llvm/Support/TargetRegistry.h" 
-#include <algorithm> 
-#include <cstddef> 
-#include <cstdint> 
-#include <memory> 
-#include <string> 
-#include <system_error> 
-#include <utility> 
- 
-using namespace llvm; 
-using namespace object; 
- 
-const EnumEntry<unsigned> llvm::object::ElfSymbolTypes[NumElfSymbolTypes] = { 
-    {"None", "NOTYPE", ELF::STT_NOTYPE}, 
-    {"Object", "OBJECT", ELF::STT_OBJECT}, 
-    {"Function", "FUNC", ELF::STT_FUNC}, 
-    {"Section", "SECTION", ELF::STT_SECTION}, 
-    {"File", "FILE", ELF::STT_FILE}, 
-    {"Common", "COMMON", ELF::STT_COMMON}, 
-    {"TLS", "TLS", ELF::STT_TLS}, 
-    {"Unknown", "<unknown>: 7", 7}, 
-    {"Unknown", "<unknown>: 8", 8}, 
-    {"Unknown", "<unknown>: 9", 9}, 
-    {"GNU_IFunc", "IFUNC", ELF::STT_GNU_IFUNC}, 
-    {"OS Specific", "<OS specific>: 11", 11}, 
-    {"OS Specific", "<OS specific>: 12", 12}, 
-    {"Proc Specific", "<processor specific>: 13", 13}, 
-    {"Proc Specific", "<processor specific>: 14", 14}, 
-    {"Proc Specific", "<processor specific>: 15", 15} 
-}; 
- 
-ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source) 
-    : ObjectFile(Type, Source) {} 
- 
-template <class ELFT> 
-static Expected<std::unique_ptr<ELFObjectFile<ELFT>>> 
+//===- ELFObjectFile.cpp - ELF object file implementation -----------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Part of the ELFObjectFile class implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/BinaryFormat/ELF.h"
+#include "llvm/MC/MCInstrAnalysis.h"
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/Object/ELF.h"
+#include "llvm/Object/ELFTypes.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Support/ARMAttributeParser.h"
+#include "llvm/Support/ARMBuildAttributes.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/RISCVAttributeParser.h"
+#include "llvm/Support/RISCVAttributes.h"
+#include "llvm/Support/TargetRegistry.h"
+#include <algorithm>
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <system_error>
+#include <utility>
+
+using namespace llvm;
+using namespace object;
+
+const EnumEntry<unsigned> llvm::object::ElfSymbolTypes[NumElfSymbolTypes] = {
+    {"None", "NOTYPE", ELF::STT_NOTYPE},
+    {"Object", "OBJECT", ELF::STT_OBJECT},
+    {"Function", "FUNC", ELF::STT_FUNC},
+    {"Section", "SECTION", ELF::STT_SECTION},
+    {"File", "FILE", ELF::STT_FILE},
+    {"Common", "COMMON", ELF::STT_COMMON},
+    {"TLS", "TLS", ELF::STT_TLS},
+    {"Unknown", "<unknown>: 7", 7},
+    {"Unknown", "<unknown>: 8", 8},
+    {"Unknown", "<unknown>: 9", 9},
+    {"GNU_IFunc", "IFUNC", ELF::STT_GNU_IFUNC},
+    {"OS Specific", "<OS specific>: 11", 11},
+    {"OS Specific", "<OS specific>: 12", 12},
+    {"Proc Specific", "<processor specific>: 13", 13},
+    {"Proc Specific", "<processor specific>: 14", 14},
+    {"Proc Specific", "<processor specific>: 15", 15}
+};
+
+ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source)
+    : ObjectFile(Type, Source) {}
+
+template <class ELFT>
+static Expected<std::unique_ptr<ELFObjectFile<ELFT>>>
 createPtr(MemoryBufferRef Object, bool InitContent) {
   auto Ret = ELFObjectFile<ELFT>::create(Object, InitContent);
-  if (Error E = Ret.takeError()) 
-    return std::move(E); 
-  return std::make_unique<ELFObjectFile<ELFT>>(std::move(*Ret)); 
-} 
- 
-Expected<std::unique_ptr<ObjectFile>> 
+  if (Error E = Ret.takeError())
+    return std::move(E);
+  return std::make_unique<ELFObjectFile<ELFT>>(std::move(*Ret));
+}
+
+Expected<std::unique_ptr<ObjectFile>>
 ObjectFile::createELFObjectFile(MemoryBufferRef Obj, bool InitContent) {
-  std::pair<unsigned char, unsigned char> Ident = 
-      getElfArchType(Obj.getBuffer()); 
-  std::size_t MaxAlignment = 
+  std::pair<unsigned char, unsigned char> Ident =
+      getElfArchType(Obj.getBuffer());
+  std::size_t MaxAlignment =
       1ULL << countTrailingZeros(
           reinterpret_cast<uintptr_t>(Obj.getBufferStart()));
- 
-  if (MaxAlignment < 2) 
-    return createError("Insufficient alignment"); 
- 
-  if (Ident.first == ELF::ELFCLASS32) { 
-    if (Ident.second == ELF::ELFDATA2LSB) 
+
+  if (MaxAlignment < 2)
+    return createError("Insufficient alignment");
+
+  if (Ident.first == ELF::ELFCLASS32) {
+    if (Ident.second == ELF::ELFDATA2LSB)
       return createPtr<ELF32LE>(Obj, InitContent);
-    else if (Ident.second == ELF::ELFDATA2MSB) 
+    else if (Ident.second == ELF::ELFDATA2MSB)
       return createPtr<ELF32BE>(Obj, InitContent);
-    else 
-      return createError("Invalid ELF data"); 
-  } else if (Ident.first == ELF::ELFCLASS64) { 
-    if (Ident.second == ELF::ELFDATA2LSB) 
+    else
+      return createError("Invalid ELF data");
+  } else if (Ident.first == ELF::ELFCLASS64) {
+    if (Ident.second == ELF::ELFDATA2LSB)
       return createPtr<ELF64LE>(Obj, InitContent);
-    else if (Ident.second == ELF::ELFDATA2MSB) 
+    else if (Ident.second == ELF::ELFDATA2MSB)
       return createPtr<ELF64BE>(Obj, InitContent);
-    else 
-      return createError("Invalid ELF data"); 
-  } 
-  return createError("Invalid ELF class"); 
-} 
- 
-SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const { 
-  SubtargetFeatures Features; 
-  unsigned PlatformFlags = getPlatformFlags(); 
- 
-  switch (PlatformFlags & ELF::EF_MIPS_ARCH) { 
-  case ELF::EF_MIPS_ARCH_1: 
-    break; 
-  case ELF::EF_MIPS_ARCH_2: 
-    Features.AddFeature("mips2"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_3: 
-    Features.AddFeature("mips3"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_4: 
-    Features.AddFeature("mips4"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_5: 
-    Features.AddFeature("mips5"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_32: 
-    Features.AddFeature("mips32"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_64: 
-    Features.AddFeature("mips64"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_32R2: 
-    Features.AddFeature("mips32r2"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_64R2: 
-    Features.AddFeature("mips64r2"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_32R6: 
-    Features.AddFeature("mips32r6"); 
-    break; 
-  case ELF::EF_MIPS_ARCH_64R6: 
-    Features.AddFeature("mips64r6"); 
-    break; 
-  default: 
-    llvm_unreachable("Unknown EF_MIPS_ARCH value"); 
-  } 
- 
-  switch (PlatformFlags & ELF::EF_MIPS_MACH) { 
-  case ELF::EF_MIPS_MACH_NONE: 
-    // No feature associated with this value. 
-    break; 
-  case ELF::EF_MIPS_MACH_OCTEON: 
-    Features.AddFeature("cnmips"); 
-    break; 
-  default: 
-    llvm_unreachable("Unknown EF_MIPS_ARCH value"); 
-  } 
- 
-  if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16) 
-    Features.AddFeature("mips16"); 
-  if (PlatformFlags & ELF::EF_MIPS_MICROMIPS) 
-    Features.AddFeature("micromips"); 
- 
-  return Features; 
-} 
- 
-SubtargetFeatures ELFObjectFileBase::getARMFeatures() const { 
-  SubtargetFeatures Features; 
-  ARMAttributeParser Attributes; 
-  if (Error E = getBuildAttributes(Attributes)) { 
-    consumeError(std::move(E)); 
-    return SubtargetFeatures(); 
-  } 
- 
-  // both ARMv7-M and R have to support thumb hardware div 
-  bool isV7 = false; 
-  Optional<unsigned> Attr = 
-      Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch); 
-  if (Attr.hasValue()) 
-    isV7 = Attr.getValue() == ARMBuildAttrs::v7; 
- 
-  Attr = Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch_profile); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    case ARMBuildAttrs::ApplicationProfile: 
-      Features.AddFeature("aclass"); 
-      break; 
-    case ARMBuildAttrs::RealTimeProfile: 
-      Features.AddFeature("rclass"); 
-      if (isV7) 
-        Features.AddFeature("hwdiv"); 
-      break; 
-    case ARMBuildAttrs::MicroControllerProfile: 
-      Features.AddFeature("mclass"); 
-      if (isV7) 
-        Features.AddFeature("hwdiv"); 
-      break; 
-    } 
-  } 
- 
-  Attr = Attributes.getAttributeValue(ARMBuildAttrs::THUMB_ISA_use); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    default: 
-      break; 
-    case ARMBuildAttrs::Not_Allowed: 
-      Features.AddFeature("thumb", false); 
-      Features.AddFeature("thumb2", false); 
-      break; 
-    case ARMBuildAttrs::AllowThumb32: 
-      Features.AddFeature("thumb2"); 
-      break; 
-    } 
-  } 
- 
-  Attr = Attributes.getAttributeValue(ARMBuildAttrs::FP_arch); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    default: 
-      break; 
-    case ARMBuildAttrs::Not_Allowed: 
-      Features.AddFeature("vfp2sp", false); 
-      Features.AddFeature("vfp3d16sp", false); 
-      Features.AddFeature("vfp4d16sp", false); 
-      break; 
-    case ARMBuildAttrs::AllowFPv2: 
-      Features.AddFeature("vfp2"); 
-      break; 
-    case ARMBuildAttrs::AllowFPv3A: 
-    case ARMBuildAttrs::AllowFPv3B: 
-      Features.AddFeature("vfp3"); 
-      break; 
-    case ARMBuildAttrs::AllowFPv4A: 
-    case ARMBuildAttrs::AllowFPv4B: 
-      Features.AddFeature("vfp4"); 
-      break; 
-    } 
-  } 
- 
-  Attr = Attributes.getAttributeValue(ARMBuildAttrs::Advanced_SIMD_arch); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    default: 
-      break; 
-    case ARMBuildAttrs::Not_Allowed: 
-      Features.AddFeature("neon", false); 
-      Features.AddFeature("fp16", false); 
-      break; 
-    case ARMBuildAttrs::AllowNeon: 
-      Features.AddFeature("neon"); 
-      break; 
-    case ARMBuildAttrs::AllowNeon2: 
-      Features.AddFeature("neon"); 
-      Features.AddFeature("fp16"); 
-      break; 
-    } 
-  } 
- 
-  Attr = Attributes.getAttributeValue(ARMBuildAttrs::MVE_arch); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    default: 
-      break; 
-    case ARMBuildAttrs::Not_Allowed: 
-      Features.AddFeature("mve", false); 
-      Features.AddFeature("mve.fp", false); 
-      break; 
-    case ARMBuildAttrs::AllowMVEInteger: 
-      Features.AddFeature("mve.fp", false); 
-      Features.AddFeature("mve"); 
-      break; 
-    case ARMBuildAttrs::AllowMVEIntegerAndFloat: 
-      Features.AddFeature("mve.fp"); 
-      break; 
-    } 
-  } 
- 
-  Attr = Attributes.getAttributeValue(ARMBuildAttrs::DIV_use); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    default: 
-      break; 
-    case ARMBuildAttrs::DisallowDIV: 
-      Features.AddFeature("hwdiv", false); 
-      Features.AddFeature("hwdiv-arm", false); 
-      break; 
-    case ARMBuildAttrs::AllowDIVExt: 
-      Features.AddFeature("hwdiv"); 
-      Features.AddFeature("hwdiv-arm"); 
-      break; 
-    } 
-  } 
- 
-  return Features; 
-} 
- 
-SubtargetFeatures ELFObjectFileBase::getRISCVFeatures() const { 
-  SubtargetFeatures Features; 
-  unsigned PlatformFlags = getPlatformFlags(); 
- 
-  if (PlatformFlags & ELF::EF_RISCV_RVC) { 
-    Features.AddFeature("c"); 
-  } 
- 
-  // Add features according to the ELF attribute section. 
-  // If there are any unrecognized features, ignore them. 
-  RISCVAttributeParser Attributes; 
-  if (Error E = getBuildAttributes(Attributes)) { 
-    // TODO Propagate Error. 
-    consumeError(std::move(E)); 
-    return Features; // Keep "c" feature if there is one in PlatformFlags. 
-  } 
- 
-  Optional<StringRef> Attr = Attributes.getAttributeString(RISCVAttrs::ARCH); 
-  if (Attr.hasValue()) { 
-    // The Arch pattern is [rv32|rv64][i|e]version(_[m|a|f|d|c]version)* 
-    // Version string pattern is (major)p(minor). Major and minor are optional. 
-    // For example, a version number could be 2p0, 2, or p92. 
-    StringRef Arch = Attr.getValue(); 
-    if (Arch.consume_front("rv32")) 
-      Features.AddFeature("64bit", false); 
-    else if (Arch.consume_front("rv64")) 
-      Features.AddFeature("64bit"); 
- 
-    while (!Arch.empty()) { 
-      switch (Arch[0]) { 
-      default: 
-        break; // Ignore unexpected features. 
-      case 'i': 
-        Features.AddFeature("e", false); 
-        break; 
-      case 'd': 
-        Features.AddFeature("f"); // D-ext will imply F-ext. 
-        LLVM_FALLTHROUGH; 
-      case 'e': 
-      case 'm': 
-      case 'a': 
-      case 'f': 
-      case 'c': 
-        Features.AddFeature(Arch.take_front()); 
-        break; 
-      } 
- 
-      // FIXME: Handle version numbers. 
-      Arch = Arch.drop_until([](char c) { return c == '_' || c == '\0'; }); 
-      Arch = Arch.drop_while([](char c) { return c == '_'; }); 
-    } 
-  } 
- 
-  return Features; 
-} 
- 
-SubtargetFeatures ELFObjectFileBase::getFeatures() const { 
-  switch (getEMachine()) { 
-  case ELF::EM_MIPS: 
-    return getMIPSFeatures(); 
-  case ELF::EM_ARM: 
-    return getARMFeatures(); 
-  case ELF::EM_RISCV: 
-    return getRISCVFeatures(); 
-  default: 
-    return SubtargetFeatures(); 
-  } 
-} 
- 
+    else
+      return createError("Invalid ELF data");
+  }
+  return createError("Invalid ELF class");
+}
+
+SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const {
+  SubtargetFeatures Features;
+  unsigned PlatformFlags = getPlatformFlags();
+
+  switch (PlatformFlags & ELF::EF_MIPS_ARCH) {
+  case ELF::EF_MIPS_ARCH_1:
+    break;
+  case ELF::EF_MIPS_ARCH_2:
+    Features.AddFeature("mips2");
+    break;
+  case ELF::EF_MIPS_ARCH_3:
+    Features.AddFeature("mips3");
+    break;
+  case ELF::EF_MIPS_ARCH_4:
+    Features.AddFeature("mips4");
+    break;
+  case ELF::EF_MIPS_ARCH_5:
+    Features.AddFeature("mips5");
+    break;
+  case ELF::EF_MIPS_ARCH_32:
+    Features.AddFeature("mips32");
+    break;
+  case ELF::EF_MIPS_ARCH_64:
+    Features.AddFeature("mips64");
+    break;
+  case ELF::EF_MIPS_ARCH_32R2:
+    Features.AddFeature("mips32r2");
+    break;
+  case ELF::EF_MIPS_ARCH_64R2:
+    Features.AddFeature("mips64r2");
+    break;
+  case ELF::EF_MIPS_ARCH_32R6:
+    Features.AddFeature("mips32r6");
+    break;
+  case ELF::EF_MIPS_ARCH_64R6:
+    Features.AddFeature("mips64r6");
+    break;
+  default:
+    llvm_unreachable("Unknown EF_MIPS_ARCH value");
+  }
+
+  switch (PlatformFlags & ELF::EF_MIPS_MACH) {
+  case ELF::EF_MIPS_MACH_NONE:
+    // No feature associated with this value.
+    break;
+  case ELF::EF_MIPS_MACH_OCTEON:
+    Features.AddFeature("cnmips");
+    break;
+  default:
+    llvm_unreachable("Unknown EF_MIPS_ARCH value");
+  }
+
+  if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16)
+    Features.AddFeature("mips16");
+  if (PlatformFlags & ELF::EF_MIPS_MICROMIPS)
+    Features.AddFeature("micromips");
+
+  return Features;
+}
+
+SubtargetFeatures ELFObjectFileBase::getARMFeatures() const {
+  SubtargetFeatures Features;
+  ARMAttributeParser Attributes;
+  if (Error E = getBuildAttributes(Attributes)) {
+    consumeError(std::move(E));
+    return SubtargetFeatures();
+  }
+
+  // both ARMv7-M and R have to support thumb hardware div
+  bool isV7 = false;
+  Optional<unsigned> Attr =
+      Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch);
+  if (Attr.hasValue())
+    isV7 = Attr.getValue() == ARMBuildAttrs::v7;
+
+  Attr = Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch_profile);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    case ARMBuildAttrs::ApplicationProfile:
+      Features.AddFeature("aclass");
+      break;
+    case ARMBuildAttrs::RealTimeProfile:
+      Features.AddFeature("rclass");
+      if (isV7)
+        Features.AddFeature("hwdiv");
+      break;
+    case ARMBuildAttrs::MicroControllerProfile:
+      Features.AddFeature("mclass");
+      if (isV7)
+        Features.AddFeature("hwdiv");
+      break;
+    }
+  }
+
+  Attr = Attributes.getAttributeValue(ARMBuildAttrs::THUMB_ISA_use);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    default:
+      break;
+    case ARMBuildAttrs::Not_Allowed:
+      Features.AddFeature("thumb", false);
+      Features.AddFeature("thumb2", false);
+      break;
+    case ARMBuildAttrs::AllowThumb32:
+      Features.AddFeature("thumb2");
+      break;
+    }
+  }
+
+  Attr = Attributes.getAttributeValue(ARMBuildAttrs::FP_arch);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    default:
+      break;
+    case ARMBuildAttrs::Not_Allowed:
+      Features.AddFeature("vfp2sp", false);
+      Features.AddFeature("vfp3d16sp", false);
+      Features.AddFeature("vfp4d16sp", false);
+      break;
+    case ARMBuildAttrs::AllowFPv2:
+      Features.AddFeature("vfp2");
+      break;
+    case ARMBuildAttrs::AllowFPv3A:
+    case ARMBuildAttrs::AllowFPv3B:
+      Features.AddFeature("vfp3");
+      break;
+    case ARMBuildAttrs::AllowFPv4A:
+    case ARMBuildAttrs::AllowFPv4B:
+      Features.AddFeature("vfp4");
+      break;
+    }
+  }
+
+  Attr = Attributes.getAttributeValue(ARMBuildAttrs::Advanced_SIMD_arch);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    default:
+      break;
+    case ARMBuildAttrs::Not_Allowed:
+      Features.AddFeature("neon", false);
+      Features.AddFeature("fp16", false);
+      break;
+    case ARMBuildAttrs::AllowNeon:
+      Features.AddFeature("neon");
+      break;
+    case ARMBuildAttrs::AllowNeon2:
+      Features.AddFeature("neon");
+      Features.AddFeature("fp16");
+      break;
+    }
+  }
+
+  Attr = Attributes.getAttributeValue(ARMBuildAttrs::MVE_arch);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    default:
+      break;
+    case ARMBuildAttrs::Not_Allowed:
+      Features.AddFeature("mve", false);
+      Features.AddFeature("mve.fp", false);
+      break;
+    case ARMBuildAttrs::AllowMVEInteger:
+      Features.AddFeature("mve.fp", false);
+      Features.AddFeature("mve");
+      break;
+    case ARMBuildAttrs::AllowMVEIntegerAndFloat:
+      Features.AddFeature("mve.fp");
+      break;
+    }
+  }
+
+  Attr = Attributes.getAttributeValue(ARMBuildAttrs::DIV_use);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    default:
+      break;
+    case ARMBuildAttrs::DisallowDIV:
+      Features.AddFeature("hwdiv", false);
+      Features.AddFeature("hwdiv-arm", false);
+      break;
+    case ARMBuildAttrs::AllowDIVExt:
+      Features.AddFeature("hwdiv");
+      Features.AddFeature("hwdiv-arm");
+      break;
+    }
+  }
+
+  return Features;
+}
+
+SubtargetFeatures ELFObjectFileBase::getRISCVFeatures() const {
+  SubtargetFeatures Features;
+  unsigned PlatformFlags = getPlatformFlags();
+
+  if (PlatformFlags & ELF::EF_RISCV_RVC) {
+    Features.AddFeature("c");
+  }
+
+  // Add features according to the ELF attribute section.
+  // If there are any unrecognized features, ignore them.
+  RISCVAttributeParser Attributes;
+  if (Error E = getBuildAttributes(Attributes)) {
+    // TODO Propagate Error.
+    consumeError(std::move(E));
+    return Features; // Keep "c" feature if there is one in PlatformFlags.
+  }
+
+  Optional<StringRef> Attr = Attributes.getAttributeString(RISCVAttrs::ARCH);
+  if (Attr.hasValue()) {
+    // The Arch pattern is [rv32|rv64][i|e]version(_[m|a|f|d|c]version)*
+    // Version string pattern is (major)p(minor). Major and minor are optional.
+    // For example, a version number could be 2p0, 2, or p92.
+    StringRef Arch = Attr.getValue();
+    if (Arch.consume_front("rv32"))
+      Features.AddFeature("64bit", false);
+    else if (Arch.consume_front("rv64"))
+      Features.AddFeature("64bit");
+
+    while (!Arch.empty()) {
+      switch (Arch[0]) {
+      default:
+        break; // Ignore unexpected features.
+      case 'i':
+        Features.AddFeature("e", false);
+        break;
+      case 'd':
+        Features.AddFeature("f"); // D-ext will imply F-ext.
+        LLVM_FALLTHROUGH;
+      case 'e':
+      case 'm':
+      case 'a':
+      case 'f':
+      case 'c':
+        Features.AddFeature(Arch.take_front());
+        break;
+      }
+
+      // FIXME: Handle version numbers.
+      Arch = Arch.drop_until([](char c) { return c == '_' || c == '\0'; });
+      Arch = Arch.drop_while([](char c) { return c == '_'; });
+    }
+  }
+
+  return Features;
+}
+
+SubtargetFeatures ELFObjectFileBase::getFeatures() const {
+  switch (getEMachine()) {
+  case ELF::EM_MIPS:
+    return getMIPSFeatures();
+  case ELF::EM_ARM:
+    return getARMFeatures();
+  case ELF::EM_RISCV:
+    return getRISCVFeatures();
+  default:
+    return SubtargetFeatures();
+  }
+}
+
 Optional<StringRef> ELFObjectFileBase::tryGetCPUName() const {
   switch (getEMachine()) {
   case ELF::EM_AMDGPU:
@@ -480,154 +480,154 @@ StringRef ELFObjectFileBase::getAMDGPUCPUName() const {
   }
 }
 
-// FIXME Encode from a tablegen description or target parser. 
-void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const { 
-  if (TheTriple.getSubArch() != Triple::NoSubArch) 
-    return; 
- 
-  ARMAttributeParser Attributes; 
-  if (Error E = getBuildAttributes(Attributes)) { 
-    // TODO Propagate Error. 
-    consumeError(std::move(E)); 
-    return; 
-  } 
- 
-  std::string Triple; 
-  // Default to ARM, but use the triple if it's been set. 
-  if (TheTriple.isThumb()) 
-    Triple = "thumb"; 
-  else 
-    Triple = "arm"; 
- 
-  Optional<unsigned> Attr = 
-      Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch); 
-  if (Attr.hasValue()) { 
-    switch (Attr.getValue()) { 
-    case ARMBuildAttrs::v4: 
-      Triple += "v4"; 
-      break; 
-    case ARMBuildAttrs::v4T: 
-      Triple += "v4t"; 
-      break; 
-    case ARMBuildAttrs::v5T: 
-      Triple += "v5t"; 
-      break; 
-    case ARMBuildAttrs::v5TE: 
-      Triple += "v5te"; 
-      break; 
-    case ARMBuildAttrs::v5TEJ: 
-      Triple += "v5tej"; 
-      break; 
-    case ARMBuildAttrs::v6: 
-      Triple += "v6"; 
-      break; 
-    case ARMBuildAttrs::v6KZ: 
-      Triple += "v6kz"; 
-      break; 
-    case ARMBuildAttrs::v6T2: 
-      Triple += "v6t2"; 
-      break; 
-    case ARMBuildAttrs::v6K: 
-      Triple += "v6k"; 
-      break; 
-    case ARMBuildAttrs::v7: 
-      Triple += "v7"; 
-      break; 
-    case ARMBuildAttrs::v6_M: 
-      Triple += "v6m"; 
-      break; 
-    case ARMBuildAttrs::v6S_M: 
-      Triple += "v6sm"; 
-      break; 
-    case ARMBuildAttrs::v7E_M: 
-      Triple += "v7em"; 
-      break; 
-    case ARMBuildAttrs::v8_A: 
-      Triple += "v8a"; 
-      break; 
-    case ARMBuildAttrs::v8_R: 
-      Triple += "v8r"; 
-      break; 
-    case ARMBuildAttrs::v8_M_Base: 
-      Triple += "v8m.base"; 
-      break; 
-    case ARMBuildAttrs::v8_M_Main: 
-      Triple += "v8m.main"; 
-      break; 
-    case ARMBuildAttrs::v8_1_M_Main: 
-      Triple += "v8.1m.main"; 
-      break; 
-    } 
-  } 
-  if (!isLittleEndian()) 
-    Triple += "eb"; 
- 
-  TheTriple.setArchName(Triple); 
-} 
- 
+// FIXME Encode from a tablegen description or target parser.
+void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const {
+  if (TheTriple.getSubArch() != Triple::NoSubArch)
+    return;
+
+  ARMAttributeParser Attributes;
+  if (Error E = getBuildAttributes(Attributes)) {
+    // TODO Propagate Error.
+    consumeError(std::move(E));
+    return;
+  }
+
+  std::string Triple;
+  // Default to ARM, but use the triple if it's been set.
+  if (TheTriple.isThumb())
+    Triple = "thumb";
+  else
+    Triple = "arm";
+
+  Optional<unsigned> Attr =
+      Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch);
+  if (Attr.hasValue()) {
+    switch (Attr.getValue()) {
+    case ARMBuildAttrs::v4:
+      Triple += "v4";
+      break;
+    case ARMBuildAttrs::v4T:
+      Triple += "v4t";
+      break;
+    case ARMBuildAttrs::v5T:
+      Triple += "v5t";
+      break;
+    case ARMBuildAttrs::v5TE:
+      Triple += "v5te";
+      break;
+    case ARMBuildAttrs::v5TEJ:
+      Triple += "v5tej";
+      break;
+    case ARMBuildAttrs::v6:
+      Triple += "v6";
+      break;
+    case ARMBuildAttrs::v6KZ:
+      Triple += "v6kz";
+      break;
+    case ARMBuildAttrs::v6T2:
+      Triple += "v6t2";
+      break;
+    case ARMBuildAttrs::v6K:
+      Triple += "v6k";
+      break;
+    case ARMBuildAttrs::v7:
+      Triple += "v7";
+      break;
+    case ARMBuildAttrs::v6_M:
+      Triple += "v6m";
+      break;
+    case ARMBuildAttrs::v6S_M:
+      Triple += "v6sm";
+      break;
+    case ARMBuildAttrs::v7E_M:
+      Triple += "v7em";
+      break;
+    case ARMBuildAttrs::v8_A:
+      Triple += "v8a";
+      break;
+    case ARMBuildAttrs::v8_R:
+      Triple += "v8r";
+      break;
+    case ARMBuildAttrs::v8_M_Base:
+      Triple += "v8m.base";
+      break;
+    case ARMBuildAttrs::v8_M_Main:
+      Triple += "v8m.main";
+      break;
+    case ARMBuildAttrs::v8_1_M_Main:
+      Triple += "v8.1m.main";
+      break;
+    }
+  }
+  if (!isLittleEndian())
+    Triple += "eb";
+
+  TheTriple.setArchName(Triple);
+}
+
 std::vector<std::pair<Optional<DataRefImpl>, uint64_t>>
-ELFObjectFileBase::getPltAddresses() const { 
-  std::string Err; 
-  const auto Triple = makeTriple(); 
-  const auto *T = TargetRegistry::lookupTarget(Triple.str(), Err); 
-  if (!T) 
-    return {}; 
-  uint64_t JumpSlotReloc = 0; 
-  switch (Triple.getArch()) { 
-    case Triple::x86: 
-      JumpSlotReloc = ELF::R_386_JUMP_SLOT; 
-      break; 
-    case Triple::x86_64: 
-      JumpSlotReloc = ELF::R_X86_64_JUMP_SLOT; 
-      break; 
-    case Triple::aarch64: 
-      JumpSlotReloc = ELF::R_AARCH64_JUMP_SLOT; 
-      break; 
-    default: 
-      return {}; 
-  } 
-  std::unique_ptr<const MCInstrInfo> MII(T->createMCInstrInfo()); 
-  std::unique_ptr<const MCInstrAnalysis> MIA( 
-      T->createMCInstrAnalysis(MII.get())); 
-  if (!MIA) 
-    return {}; 
-  Optional<SectionRef> Plt = None, RelaPlt = None, GotPlt = None; 
-  for (const SectionRef &Section : sections()) { 
-    Expected<StringRef> NameOrErr = Section.getName(); 
-    if (!NameOrErr) { 
-      consumeError(NameOrErr.takeError()); 
-      continue; 
-    } 
-    StringRef Name = *NameOrErr; 
- 
-    if (Name == ".plt") 
-      Plt = Section; 
-    else if (Name == ".rela.plt" || Name == ".rel.plt") 
-      RelaPlt = Section; 
-    else if (Name == ".got.plt") 
-      GotPlt = Section; 
-  } 
-  if (!Plt || !RelaPlt || !GotPlt) 
-    return {}; 
-  Expected<StringRef> PltContents = Plt->getContents(); 
-  if (!PltContents) { 
-    consumeError(PltContents.takeError()); 
-    return {}; 
-  } 
-  auto PltEntries = MIA->findPltEntries(Plt->getAddress(), 
-                                        arrayRefFromStringRef(*PltContents), 
-                                        GotPlt->getAddress(), Triple); 
-  // Build a map from GOT entry virtual address to PLT entry virtual address. 
-  DenseMap<uint64_t, uint64_t> GotToPlt; 
-  for (const auto &Entry : PltEntries) 
-    GotToPlt.insert(std::make_pair(Entry.second, Entry.first)); 
-  // Find the relocations in the dynamic relocation table that point to 
-  // locations in the GOT for which we know the corresponding PLT entry. 
+ELFObjectFileBase::getPltAddresses() const {
+  std::string Err;
+  const auto Triple = makeTriple();
+  const auto *T = TargetRegistry::lookupTarget(Triple.str(), Err);
+  if (!T)
+    return {};
+  uint64_t JumpSlotReloc = 0;
+  switch (Triple.getArch()) {
+    case Triple::x86:
+      JumpSlotReloc = ELF::R_386_JUMP_SLOT;
+      break;
+    case Triple::x86_64:
+      JumpSlotReloc = ELF::R_X86_64_JUMP_SLOT;
+      break;
+    case Triple::aarch64:
+      JumpSlotReloc = ELF::R_AARCH64_JUMP_SLOT;
+      break;
+    default:
+      return {};
+  }
+  std::unique_ptr<const MCInstrInfo> MII(T->createMCInstrInfo());
+  std::unique_ptr<const MCInstrAnalysis> MIA(
+      T->createMCInstrAnalysis(MII.get()));
+  if (!MIA)
+    return {};
+  Optional<SectionRef> Plt = None, RelaPlt = None, GotPlt = None;
+  for (const SectionRef &Section : sections()) {
+    Expected<StringRef> NameOrErr = Section.getName();
+    if (!NameOrErr) {
+      consumeError(NameOrErr.takeError());
+      continue;
+    }
+    StringRef Name = *NameOrErr;
+
+    if (Name == ".plt")
+      Plt = Section;
+    else if (Name == ".rela.plt" || Name == ".rel.plt")
+      RelaPlt = Section;
+    else if (Name == ".got.plt")
+      GotPlt = Section;
+  }
+  if (!Plt || !RelaPlt || !GotPlt)
+    return {};
+  Expected<StringRef> PltContents = Plt->getContents();
+  if (!PltContents) {
+    consumeError(PltContents.takeError());
+    return {};
+  }
+  auto PltEntries = MIA->findPltEntries(Plt->getAddress(),
+                                        arrayRefFromStringRef(*PltContents),
+                                        GotPlt->getAddress(), Triple);
+  // Build a map from GOT entry virtual address to PLT entry virtual address.
+  DenseMap<uint64_t, uint64_t> GotToPlt;
+  for (const auto &Entry : PltEntries)
+    GotToPlt.insert(std::make_pair(Entry.second, Entry.first));
+  // Find the relocations in the dynamic relocation table that point to
+  // locations in the GOT for which we know the corresponding PLT entry.
   std::vector<std::pair<Optional<DataRefImpl>, uint64_t>> Result;
-  for (const auto &Relocation : RelaPlt->relocations()) { 
-    if (Relocation.getType() != JumpSlotReloc) 
-      continue; 
-    auto PltEntryIter = GotToPlt.find(Relocation.getOffset()); 
+  for (const auto &Relocation : RelaPlt->relocations()) {
+    if (Relocation.getType() != JumpSlotReloc)
+      continue;
+    auto PltEntryIter = GotToPlt.find(Relocation.getOffset());
     if (PltEntryIter != GotToPlt.end()) {
       symbol_iterator Sym = Relocation.getSymbol();
       if (Sym == symbol_end())
@@ -635,6 +635,6 @@ ELFObjectFileBase::getPltAddresses() const {
       else
         Result.emplace_back(Sym->getRawDataRefImpl(), PltEntryIter->second);
     }
-  } 
-  return Result; 
-} 
+  }
+  return Result;
+}