--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/lib/Basic/Targets/OSTargets.h	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,875 @@
+//===--- OSTargets.h - Declare OS target feature support --------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares OS specific TargetInfo types.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_OSTARGETS_H
+#define LLVM_CLANG_LIB_BASIC_TARGETS_OSTARGETS_H
+
+#include "Targets.h"
+#include "llvm/MC/MCSectionMachO.h"
+
+namespace clang {
+namespace targets {
+
+template <typename TgtInfo>
+class LLVM_LIBRARY_VISIBILITY OSTargetInfo : public TgtInfo {
+protected:
+  virtual void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                            MacroBuilder &Builder) const = 0;
+
+public:
+  OSTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : TgtInfo(Triple, Opts) {}
+
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override {
+    TgtInfo::getTargetDefines(Opts, Builder);
+    getOSDefines(Opts, TgtInfo::getTriple(), Builder);
+  }
+};
+
+// CloudABI Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY CloudABITargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    Builder.defineMacro("__CloudABI__");
+    Builder.defineMacro("__ELF__");
+
+    // CloudABI uses ISO/IEC 10646:2012 for wchar_t, char16_t and char32_t.
+    Builder.defineMacro("__STDC_ISO_10646__", "201206L");
+    Builder.defineMacro("__STDC_UTF_16__");
+    Builder.defineMacro("__STDC_UTF_32__");
+  }
+
+public:
+  CloudABITargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {}
+};
+
+// Ananas target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY AnanasTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // Ananas defines
+    Builder.defineMacro("__Ananas__");
+    Builder.defineMacro("__ELF__");
+  }
+
+public:
+  AnanasTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {}
+};
+
+void getDarwinDefines(MacroBuilder &Builder, const LangOptions &Opts,
+                      const llvm::Triple &Triple, StringRef &PlatformName,
+                      VersionTuple &PlatformMinVersion);
+
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY DarwinTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    getDarwinDefines(Builder, Opts, Triple, this->PlatformName,
+                     this->PlatformMinVersion);
+  }
+
+public:
+  DarwinTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    // By default, no TLS, and we whitelist permitted architecture/OS
+    // combinations.
+    this->TLSSupported = false;
+
+    if (Triple.isMacOSX())
+      this->TLSSupported = !Triple.isMacOSXVersionLT(10, 7);
+    else if (Triple.isiOS()) {
+      // 64-bit iOS supported it from 8 onwards, 32-bit device from 9 onwards,
+      // 32-bit simulator from 10 onwards.
+      if (Triple.isArch64Bit())
+        this->TLSSupported = !Triple.isOSVersionLT(8);
+      else if (Triple.isArch32Bit()) {
+        if (!Triple.isSimulatorEnvironment())
+          this->TLSSupported = !Triple.isOSVersionLT(9);
+        else
+          this->TLSSupported = !Triple.isOSVersionLT(10);
+      }
+    } else if (Triple.isWatchOS()) {
+      if (!Triple.isSimulatorEnvironment())
+        this->TLSSupported = !Triple.isOSVersionLT(2);
+      else
+        this->TLSSupported = !Triple.isOSVersionLT(3);
+    }
+
+    this->MCountName = "\01mcount";
+  }
+
+  std::string isValidSectionSpecifier(StringRef SR) const override {
+    // Let MCSectionMachO validate this.
+    StringRef Segment, Section;
+    unsigned TAA, StubSize;
+    bool HasTAA;
+    return llvm::MCSectionMachO::ParseSectionSpecifier(SR, Segment, Section,
+                                                       TAA, HasTAA, StubSize);
+  }
+
+  const char *getStaticInitSectionSpecifier() const override {
+    // FIXME: We should return 0 when building kexts.
+    return "__TEXT,__StaticInit,regular,pure_instructions";
+  }
+
+  /// Darwin does not support protected visibility.  Darwin's "default"
+  /// is very similar to ELF's "protected";  Darwin requires a "weak"
+  /// attribute on declarations that can be dynamically replaced.
+  bool hasProtectedVisibility() const override { return false; }
+
+  unsigned getExnObjectAlignment() const override {
+    // Older versions of libc++abi guarantee an alignment of only 8-bytes for
+    // exception objects because of a bug in __cxa_exception that was
+    // eventually fixed in r319123.
+    llvm::VersionTuple MinVersion;
+    const llvm::Triple &T = this->getTriple();
+
+    // Compute the earliest OS versions that have the fix to libc++abi.
+    switch (T.getOS()) {
+    case llvm::Triple::Darwin:
+    case llvm::Triple::MacOSX: // Earliest supporting version is 10.14.
+      MinVersion = llvm::VersionTuple(10U, 14U);
+      break;
+    case llvm::Triple::IOS:
+    case llvm::Triple::TvOS: // Earliest supporting version is 12.0.0.
+      MinVersion = llvm::VersionTuple(12U);
+      break;
+    case llvm::Triple::WatchOS: // Earliest supporting version is 5.0.0.
+      MinVersion = llvm::VersionTuple(5U);
+      break;
+    default:
+      llvm_unreachable("Unexpected OS");
+    }
+
+    unsigned Major, Minor, Micro;
+    T.getOSVersion(Major, Minor, Micro);
+    if (llvm::VersionTuple(Major, Minor, Micro) < MinVersion)
+      return 64;
+    return OSTargetInfo<Target>::getExnObjectAlignment();
+  }
+
+  TargetInfo::IntType getLeastIntTypeByWidth(unsigned BitWidth,
+                                             bool IsSigned) const final {
+    // Darwin uses `long long` for `int_least64_t` and `int_fast64_t`.
+    return BitWidth == 64
+               ? (IsSigned ? TargetInfo::SignedLongLong
+                           : TargetInfo::UnsignedLongLong)
+               : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
+  }
+};
+
+// DragonFlyBSD Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY DragonFlyBSDTargetInfo
+    : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // DragonFly defines; list based off of gcc output
+    Builder.defineMacro("__DragonFly__");
+    Builder.defineMacro("__DragonFly_cc_version", "100001");
+    Builder.defineMacro("__ELF__");
+    Builder.defineMacro("__KPRINTF_ATTRIBUTE__");
+    Builder.defineMacro("__tune_i386__");
+    DefineStd(Builder, "unix", Opts);
+  }
+
+public:
+  DragonFlyBSDTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    switch (Triple.getArch()) {
+    default:
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->MCountName = ".mcount";
+      break;
+    }
+  }
+};
+
+#ifndef FREEBSD_CC_VERSION
+#define FREEBSD_CC_VERSION 0U
+#endif
+
+// FreeBSD Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY FreeBSDTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // FreeBSD defines; list based off of gcc output
+
+    unsigned Release = Triple.getOSMajorVersion();
+    if (Release == 0U)
+      Release = 8U;
+    unsigned CCVersion = FREEBSD_CC_VERSION;
+    if (CCVersion == 0U)
+      CCVersion = Release * 100000U + 1U;
+
+    Builder.defineMacro("__FreeBSD__", Twine(Release));
+    Builder.defineMacro("__FreeBSD_cc_version", Twine(CCVersion));
+    Builder.defineMacro("__KPRINTF_ATTRIBUTE__");
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__ELF__");
+
+    // On FreeBSD, wchar_t contains the number of the code point as
+    // used by the character set of the locale. These character sets are
+    // not necessarily a superset of ASCII.
+    //
+    // FIXME: This is wrong; the macro refers to the numerical values
+    // of wchar_t *literals*, which are not locale-dependent. However,
+    // FreeBSD systems apparently depend on us getting this wrong, and
+    // setting this to 1 is conforming even if all the basic source
+    // character literals have the same encoding as char and wchar_t.
+    Builder.defineMacro("__STDC_MB_MIGHT_NEQ_WC__", "1");
+  }
+
+public:
+  FreeBSDTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    switch (Triple.getArch()) {
+    default:
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->MCountName = ".mcount";
+      break;
+    case llvm::Triple::mips:
+    case llvm::Triple::mipsel:
+    case llvm::Triple::ppc:
+    case llvm::Triple::ppc64:
+    case llvm::Triple::ppc64le:
+      this->MCountName = "_mcount";
+      break;
+    case llvm::Triple::arm:
+      this->MCountName = "__mcount";
+      break;
+    }
+  }
+};
+
+// GNU/kFreeBSD Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY KFreeBSDTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // GNU/kFreeBSD defines; list based off of gcc output
+
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__FreeBSD_kernel__");
+    Builder.defineMacro("__GLIBC__");
+    Builder.defineMacro("__ELF__");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+  }
+
+public:
+  KFreeBSDTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {}
+};
+
+// Haiku Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY HaikuTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // Haiku defines; list based off of gcc output
+    Builder.defineMacro("__HAIKU__");
+    Builder.defineMacro("__ELF__");
+    DefineStd(Builder, "unix", Opts);
+    if (this->HasFloat128) 
+      Builder.defineMacro("__FLOAT128__");
+  }
+
+public:
+  HaikuTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->SizeType = TargetInfo::UnsignedLong;
+    this->IntPtrType = TargetInfo::SignedLong;
+    this->PtrDiffType = TargetInfo::SignedLong;
+    this->ProcessIDType = TargetInfo::SignedLong;
+    this->TLSSupported = false;
+    switch (Triple.getArch()) {
+    default:
+      break;
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->HasFloat128 = true;
+      break;
+    }
+  }
+};
+
+// Hurd target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY HurdTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // Hurd defines; list based off of gcc output.
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__GNU__");
+    Builder.defineMacro("__gnu_hurd__");
+    Builder.defineMacro("__MACH__");
+    Builder.defineMacro("__GLIBC__");
+    Builder.defineMacro("__ELF__");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+  }
+public:
+  HurdTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {}
+};
+
+// Minix Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY MinixTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // Minix defines
+
+    Builder.defineMacro("__minix", "3");
+    Builder.defineMacro("_EM_WSIZE", "4");
+    Builder.defineMacro("_EM_PSIZE", "4");
+    Builder.defineMacro("_EM_SSIZE", "2");
+    Builder.defineMacro("_EM_LSIZE", "4");
+    Builder.defineMacro("_EM_FSIZE", "4");
+    Builder.defineMacro("_EM_DSIZE", "8");
+    Builder.defineMacro("__ELF__");
+    DefineStd(Builder, "unix", Opts);
+  }
+
+public:
+  MinixTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {}
+};
+
+// Linux target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY LinuxTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // Linux defines; list based off of gcc output
+    DefineStd(Builder, "unix", Opts);
+    DefineStd(Builder, "linux", Opts);
+    Builder.defineMacro("__ELF__");
+    if (Triple.isAndroid()) {
+      Builder.defineMacro("__ANDROID__", "1");
+      unsigned Maj, Min, Rev;
+      Triple.getEnvironmentVersion(Maj, Min, Rev);
+      this->PlatformName = "android";
+      this->PlatformMinVersion = VersionTuple(Maj, Min, Rev);
+      if (Maj)
+        Builder.defineMacro("__ANDROID_API__", Twine(Maj));
+    } else {
+        Builder.defineMacro("__gnu_linux__");
+    }
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+    if (this->HasFloat128)
+      Builder.defineMacro("__FLOAT128__");
+  }
+
+public:
+  LinuxTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->WIntType = TargetInfo::UnsignedInt;
+
+    switch (Triple.getArch()) {
+    default:
+      break;
+    case llvm::Triple::mips:
+    case llvm::Triple::mipsel:
+    case llvm::Triple::mips64:
+    case llvm::Triple::mips64el:
+    case llvm::Triple::ppc:
+    case llvm::Triple::ppc64:
+    case llvm::Triple::ppc64le:
+      this->MCountName = "_mcount";
+      break;
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->HasFloat128 = true;
+      break;
+    }
+  }
+
+  const char *getStaticInitSectionSpecifier() const override {
+    return ".text.startup";
+  }
+};
+
+// NetBSD Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY NetBSDTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // NetBSD defines; list based off of gcc output
+    Builder.defineMacro("__NetBSD__");
+    Builder.defineMacro("__unix__");
+    Builder.defineMacro("__ELF__");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+  }
+
+public:
+  NetBSDTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->MCountName = "__mcount";
+  }
+};
+
+// OpenBSD Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY OpenBSDTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // OpenBSD defines; list based off of gcc output
+
+    Builder.defineMacro("__OpenBSD__");
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__ELF__");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    if (this->HasFloat128)
+      Builder.defineMacro("__FLOAT128__");
+  }
+
+public:
+  OpenBSDTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    switch (Triple.getArch()) {
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->HasFloat128 = true;
+      LLVM_FALLTHROUGH;
+    default:
+      this->MCountName = "__mcount";
+      break;
+    case llvm::Triple::mips64:
+    case llvm::Triple::mips64el:
+    case llvm::Triple::ppc:
+    case llvm::Triple::sparcv9:
+      this->MCountName = "_mcount";
+      break;
+    }
+  }
+};
+
+// PSP Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY PSPTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // PSP defines; list based on the output of the pspdev gcc toolchain.
+    Builder.defineMacro("PSP");
+    Builder.defineMacro("_PSP");
+    Builder.defineMacro("__psp__");
+    Builder.defineMacro("__ELF__");
+  }
+
+public:
+  PSPTargetInfo(const llvm::Triple &Triple) : OSTargetInfo<Target>(Triple) {}
+};
+
+// PS3 PPU Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY PS3PPUTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // PS3 PPU defines.
+    Builder.defineMacro("__PPC__");
+    Builder.defineMacro("__PPU__");
+    Builder.defineMacro("__CELLOS_LV2__");
+    Builder.defineMacro("__ELF__");
+    Builder.defineMacro("__LP32__");
+    Builder.defineMacro("_ARCH_PPC64");
+    Builder.defineMacro("__powerpc64__");
+  }
+
+public:
+  PS3PPUTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->LongWidth = this->LongAlign = 32;
+    this->PointerWidth = this->PointerAlign = 32;
+    this->IntMaxType = TargetInfo::SignedLongLong;
+    this->Int64Type = TargetInfo::SignedLongLong;
+    this->SizeType = TargetInfo::UnsignedInt;
+    this->resetDataLayout("E-m:e-p:32:32-i64:64-n32:64");
+  }
+};
+
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY PS4OSTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    Builder.defineMacro("__FreeBSD__", "9");
+    Builder.defineMacro("__FreeBSD_cc_version", "900001");
+    Builder.defineMacro("__KPRINTF_ATTRIBUTE__");
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__ELF__");
+    Builder.defineMacro("__SCE__");
+    Builder.defineMacro("__ORBIS__");
+  }
+
+public:
+  PS4OSTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->WCharType = TargetInfo::UnsignedShort;
+
+    // On PS4, TLS variable cannot be aligned to more than 32 bytes (256 bits).
+    this->MaxTLSAlign = 256;
+
+    // On PS4, do not honor explicit bit field alignment,
+    // as in "__attribute__((aligned(2))) int b : 1;".
+    this->UseExplicitBitFieldAlignment = false;
+
+    switch (Triple.getArch()) {
+    default:
+    case llvm::Triple::x86_64:
+      this->MCountName = ".mcount";
+      this->NewAlign = 256;
+      break;
+    }
+  }
+  TargetInfo::CallingConvCheckResult
+  checkCallingConvention(CallingConv CC) const override {
+    return (CC == CC_C) ? TargetInfo::CCCR_OK : TargetInfo::CCCR_Error;
+  }
+};
+
+// RTEMS Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY RTEMSTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    // RTEMS defines; list based off of gcc output
+
+    Builder.defineMacro("__rtems__");
+    Builder.defineMacro("__ELF__");
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+  }
+
+public:
+  RTEMSTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    switch (Triple.getArch()) {
+    default:
+    case llvm::Triple::x86:
+      // this->MCountName = ".mcount";
+      break;
+    case llvm::Triple::mips:
+    case llvm::Triple::mipsel:
+    case llvm::Triple::ppc:
+    case llvm::Triple::ppc64:
+    case llvm::Triple::ppc64le:
+      // this->MCountName = "_mcount";
+      break;
+    case llvm::Triple::arm:
+      // this->MCountName = "__mcount";
+      break;
+    }
+  }
+};
+
+// Solaris target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY SolarisTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    DefineStd(Builder, "sun", Opts);
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__ELF__");
+    Builder.defineMacro("__svr4__");
+    Builder.defineMacro("__SVR4");
+    // Solaris headers require _XOPEN_SOURCE to be set to 600 for C99 and
+    // newer, but to 500 for everything else.  feature_test.h has a check to
+    // ensure that you are not using C99 with an old version of X/Open or C89
+    // with a new version.
+    if (Opts.C99)
+      Builder.defineMacro("_XOPEN_SOURCE", "600");
+    else
+      Builder.defineMacro("_XOPEN_SOURCE", "500");
+    if (Opts.CPlusPlus) {
+      Builder.defineMacro("__C99FEATURES__");
+      Builder.defineMacro("_FILE_OFFSET_BITS", "64");
+    }
+    // GCC restricts the next two to C++.
+    Builder.defineMacro("_LARGEFILE_SOURCE");
+    Builder.defineMacro("_LARGEFILE64_SOURCE");
+    Builder.defineMacro("__EXTENSIONS__");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    if (this->HasFloat128)
+      Builder.defineMacro("__FLOAT128__");
+  }
+
+public:
+  SolarisTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    if (this->PointerWidth == 64) {
+      this->WCharType = this->WIntType = this->SignedInt;
+    } else {
+      this->WCharType = this->WIntType = this->SignedLong;
+    }
+    switch (Triple.getArch()) {
+    default:
+      break;
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->HasFloat128 = true;
+      break;
+    }
+  }
+};
+
+// AIX Target
+template <typename Target>
+class AIXTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("_IBMR2");
+    Builder.defineMacro("_POWER");
+
+    Builder.defineMacro("_AIX");
+
+    unsigned Major, Minor, Micro;
+    Triple.getOSVersion(Major, Minor, Micro);
+
+    // Define AIX OS-Version Macros.
+    // Includes logic for legacy versions of AIX; no specific intent to support.
+    std::pair<int, int> OsVersion = {Major, Minor};
+    if (OsVersion >= std::make_pair(3, 2)) Builder.defineMacro("_AIX32");
+    if (OsVersion >= std::make_pair(4, 1)) Builder.defineMacro("_AIX41");
+    if (OsVersion >= std::make_pair(4, 3)) Builder.defineMacro("_AIX43");
+    if (OsVersion >= std::make_pair(5, 0)) Builder.defineMacro("_AIX50");
+    if (OsVersion >= std::make_pair(5, 1)) Builder.defineMacro("_AIX51");
+    if (OsVersion >= std::make_pair(5, 2)) Builder.defineMacro("_AIX52");
+    if (OsVersion >= std::make_pair(5, 3)) Builder.defineMacro("_AIX53");
+    if (OsVersion >= std::make_pair(6, 1)) Builder.defineMacro("_AIX61");
+    if (OsVersion >= std::make_pair(7, 1)) Builder.defineMacro("_AIX71");
+    if (OsVersion >= std::make_pair(7, 2)) Builder.defineMacro("_AIX72");
+
+    // FIXME: Do not define _LONG_LONG when -fno-long-long is specified.
+    Builder.defineMacro("_LONG_LONG");
+
+    if (Opts.POSIXThreads) {
+      Builder.defineMacro("_THREAD_SAFE");
+    }
+
+    if (this->PointerWidth == 64) {
+      Builder.defineMacro("__64BIT__");
+    }
+
+    // Define _WCHAR_T when it is a fundamental type
+    // (i.e., for C++ without -fno-wchar).
+    if (Opts.CPlusPlus && Opts.WChar) {
+      Builder.defineMacro("_WCHAR_T");
+    }
+  }
+
+public:
+  AIXTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    if (this->PointerWidth == 64) {
+      this->WCharType = this->UnsignedInt;
+    } else {
+      this->WCharType = this->UnsignedShort;
+    }
+    this->UseZeroLengthBitfieldAlignment = true;
+  }
+
+  // AIX sets FLT_EVAL_METHOD to be 1.
+  unsigned getFloatEvalMethod() const override { return 1; }
+  bool hasInt128Type() const override { return false; }
+};
+
+void addWindowsDefines(const llvm::Triple &Triple, const LangOptions &Opts,
+                       MacroBuilder &Builder);
+
+// Windows target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY WindowsTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    addWindowsDefines(Triple, Opts, Builder);
+  }
+
+public:
+  WindowsTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->WCharType = TargetInfo::UnsignedShort;
+    this->WIntType = TargetInfo::UnsignedShort;
+  }
+};
+
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY NaClTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+
+    DefineStd(Builder, "unix", Opts);
+    Builder.defineMacro("__ELF__");
+    Builder.defineMacro("__native_client__");
+  }
+
+public:
+  NaClTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->LongAlign = 32;
+    this->LongWidth = 32;
+    this->PointerAlign = 32;
+    this->PointerWidth = 32;
+    this->IntMaxType = TargetInfo::SignedLongLong;
+    this->Int64Type = TargetInfo::SignedLongLong;
+    this->DoubleAlign = 64;
+    this->LongDoubleWidth = 64;
+    this->LongDoubleAlign = 64;
+    this->LongLongWidth = 64;
+    this->LongLongAlign = 64;
+    this->SizeType = TargetInfo::UnsignedInt;
+    this->PtrDiffType = TargetInfo::SignedInt;
+    this->IntPtrType = TargetInfo::SignedInt;
+    // RegParmMax is inherited from the underlying architecture.
+    this->LongDoubleFormat = &llvm::APFloat::IEEEdouble();
+    if (Triple.getArch() == llvm::Triple::arm) {
+      // Handled in ARM's setABI().
+    } else if (Triple.getArch() == llvm::Triple::x86) {
+      this->resetDataLayout("e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-"
+                            "i64:64-n8:16:32-S128");
+    } else if (Triple.getArch() == llvm::Triple::x86_64) {
+      this->resetDataLayout("e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-"
+                            "i64:64-n8:16:32:64-S128");
+    } else if (Triple.getArch() == llvm::Triple::mipsel) {
+      // Handled on mips' setDataLayout.
+    } else {
+      assert(Triple.getArch() == llvm::Triple::le32);
+      this->resetDataLayout("e-p:32:32-i64:64");
+    }
+  }
+};
+
+// Fuchsia Target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY FuchsiaTargetInfo : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override {
+    Builder.defineMacro("__Fuchsia__");
+    Builder.defineMacro("__ELF__");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    // Required by the libc++ locale support.
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+  }
+
+public:
+  FuchsiaTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->MCountName = "__mcount";
+    this->TheCXXABI.set(TargetCXXABI::Fuchsia);
+  }
+};
+
+// WebAssembly target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY WebAssemblyOSTargetInfo
+    : public OSTargetInfo<Target> {
+protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const {
+    // A common platform macro.
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
+    // Follow g++ convention and predefine _GNU_SOURCE for C++.
+    if (Opts.CPlusPlus)
+      Builder.defineMacro("_GNU_SOURCE");
+    // Indicate that we have __float128.
+    Builder.defineMacro("__FLOAT128__");
+  }
+
+public:
+  explicit WebAssemblyOSTargetInfo(const llvm::Triple &Triple,
+                                   const TargetOptions &Opts)
+      : OSTargetInfo<Target>(Triple, Opts) {
+    this->MCountName = "__mcount";
+    this->TheCXXABI.set(TargetCXXABI::WebAssembly);
+    this->HasFloat128 = true;
+  }
+};
+
+// WASI target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY WASITargetInfo
+    : public WebAssemblyOSTargetInfo<Target> {
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const final {
+    WebAssemblyOSTargetInfo<Target>::getOSDefines(Opts, Triple, Builder);
+    Builder.defineMacro("__wasi__");
+  }
+
+public:
+  explicit WASITargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : WebAssemblyOSTargetInfo<Target>(Triple, Opts) {}
+};
+
+// Emscripten target
+template <typename Target>
+class LLVM_LIBRARY_VISIBILITY EmscriptenTargetInfo
+    : public WebAssemblyOSTargetInfo<Target> {
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const final {
+    WebAssemblyOSTargetInfo<Target>::getOSDefines(Opts, Triple, Builder);
+    Builder.defineMacro("__EMSCRIPTEN__");
+  }
+
+public:
+  explicit EmscriptenTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
+      : WebAssemblyOSTargetInfo<Target>(Triple, Opts) {}
+};
+
+} // namespace targets
+} // namespace clang
+#endif // LLVM_CLANG_LIB_BASIC_TARGETS_OSTARGETS_H