diff --git a/clang/lib/Driver/CMakeLists.txt b/clang/lib/Driver/CMakeLists.txt
--- a/clang/lib/Driver/CMakeLists.txt
+++ b/clang/lib/Driver/CMakeLists.txt
@@ -71,7 +71,6 @@
   ToolChains/MinGW.cpp
   ToolChains/MSP430.cpp
   ToolChains/MSVC.cpp
-  ToolChains/Myriad.cpp
   ToolChains/NaCl.cpp
   ToolChains/NetBSD.cpp
   ToolChains/OHOS.cpp
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -36,7 +36,6 @@
 #include "ToolChains/MSVC.h"
 #include "ToolChains/MinGW.h"
 #include "ToolChains/MipsLinux.h"
-#include "ToolChains/Myriad.h"
 #include "ToolChains/NaCl.h"
 #include "ToolChains/NetBSD.h"
 #include "ToolChains/OHOS.h"
@@ -6325,10 +6324,7 @@
         TC = std::make_unique<toolchains::CSKYToolChain>(*this, Target, Args);
         break;
       default:
-        if (Target.getVendor() == llvm::Triple::Myriad)
-          TC = std::make_unique<toolchains::MyriadToolChain>(*this, Target,
-                                                              Args);
-        else if (toolchains::BareMetal::handlesTarget(Target))
+        if (toolchains::BareMetal::handlesTarget(Target))
           TC = std::make_unique<toolchains::BareMetal>(*this, Target, Args);
         else if (Target.isOSBinFormatELF())
           TC = std::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
diff --git a/clang/lib/Driver/ToolChains/Gnu.h b/clang/lib/Driver/ToolChains/Gnu.h
--- a/clang/lib/Driver/ToolChains/Gnu.h
+++ b/clang/lib/Driver/ToolChains/Gnu.h
@@ -218,8 +218,7 @@
 
   public:
     explicit GCCInstallationDetector(const Driver &D) : IsValid(false), D(D) {}
-    void init(const llvm::Triple &TargetTriple, const llvm::opt::ArgList &Args,
-              ArrayRef<std::string> ExtraTripleAliases = std::nullopt);
+    void init(const llvm::Triple &TargetTriple, const llvm::opt::ArgList &Args);
 
     /// Check whether we detected a valid GCC install.
     bool isValid() const { return IsValid; }
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2071,8 +2071,7 @@
 /// necessary because the driver doesn't store the final version of the target
 /// triple.
 void Generic_GCC::GCCInstallationDetector::init(
-    const llvm::Triple &TargetTriple, const ArgList &Args,
-    ArrayRef<std::string> ExtraTripleAliases) {
+    const llvm::Triple &TargetTriple, const ArgList &Args) {
   llvm::Triple BiarchVariantTriple = TargetTriple.isArch32Bit()
                                          ? TargetTriple.get64BitArchVariant()
                                          : TargetTriple.get32BitArchVariant();
@@ -2146,9 +2145,6 @@
     // may pick the libraries for x86_64-pc-linux-gnu even when exact matching
     // triple x86_64-gentoo-linux-gnu is present.
     GentooTestTriples.push_back(TargetTriple.str());
-    // Check rest of triples.
-    GentooTestTriples.append(ExtraTripleAliases.begin(),
-                             ExtraTripleAliases.end());
     GentooTestTriples.append(CandidateTripleAliases.begin(),
                              CandidateTripleAliases.end());
     if (ScanGentooConfigs(TargetTriple, Args, GentooTestTriples,
@@ -2178,10 +2174,6 @@
       if (TargetTriple.getVendor() == llvm::Triple::UnknownVendor)
         ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, TripleNoVendorRef,
                                false, GCCDirExists, GCCCrossDirExists);
-      // Try rest of possible triples.
-      for (StringRef Candidate : ExtraTripleAliases) // Try these first.
-        ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, Candidate, false,
-                               GCCDirExists, GCCCrossDirExists);
       for (StringRef Candidate : CandidateTripleAliases)
         ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, Candidate, false,
                                GCCDirExists, GCCCrossDirExists);
@@ -2963,7 +2955,7 @@
   case llvm::Triple::xcore:
     return false;
   default:
-    return getTriple().getVendor() != llvm::Triple::Myriad;
+    return true;
   }
 }
 
diff --git a/clang/lib/Driver/ToolChains/Myriad.h b/clang/lib/Driver/ToolChains/Myriad.h
deleted file mode 100644
--- a/clang/lib/Driver/ToolChains/Myriad.h
+++ /dev/null
@@ -1,103 +0,0 @@
-//===--- Myriad.h - Myriad ToolChain Implementations ------------*- 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
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_MYRIAD_H
-#define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_MYRIAD_H
-
-#include "Gnu.h"
-#include "clang/Driver/Tool.h"
-#include "clang/Driver/ToolChain.h"
-
-namespace clang {
-namespace driver {
-namespace tools {
-
-/// SHAVE tools -- Directly call moviCompile and moviAsm
-namespace SHAVE {
-class LLVM_LIBRARY_VISIBILITY Compiler : public Tool {
-public:
-  Compiler(const ToolChain &TC) : Tool("moviCompile", "movicompile", TC) {}
-
-  bool hasIntegratedCPP() const override { return true; }
-
-  void ConstructJob(Compilation &C, const JobAction &JA,
-                    const InputInfo &Output, const InputInfoList &Inputs,
-                    const llvm::opt::ArgList &TCArgs,
-                    const char *LinkingOutput) const override;
-};
-
-class LLVM_LIBRARY_VISIBILITY Assembler : public Tool {
-public:
-  Assembler(const ToolChain &TC) : Tool("moviAsm", "moviAsm", TC) {}
-
-  bool hasIntegratedCPP() const override { return false; } // not sure.
-
-  void ConstructJob(Compilation &C, const JobAction &JA,
-                    const InputInfo &Output, const InputInfoList &Inputs,
-                    const llvm::opt::ArgList &TCArgs,
-                    const char *LinkingOutput) const override;
-};
-} // end namespace SHAVE
-
-/// The Myriad toolchain uses tools that are in two different namespaces.
-/// The Compiler and Assembler as defined above are in the SHAVE namespace,
-/// whereas the linker, which accepts code for a mixture of Sparc and SHAVE,
-/// is in the Myriad namespace.
-namespace Myriad {
-class LLVM_LIBRARY_VISIBILITY Linker : public Tool {
-public:
-  Linker(const ToolChain &TC) : Tool("shave::Linker", "ld", TC) {}
-  bool hasIntegratedCPP() const override { return false; }
-  bool isLinkJob() const override { return true; }
-  void ConstructJob(Compilation &C, const JobAction &JA,
-                    const InputInfo &Output, const InputInfoList &Inputs,
-                    const llvm::opt::ArgList &TCArgs,
-                    const char *LinkingOutput) const override;
-};
-} // end namespace Myriad
-} // end namespace tools
-
-namespace toolchains {
-
-/// MyriadToolChain - A tool chain using either clang or the external compiler
-/// installed by the Movidius SDK to perform all subcommands.
-class LLVM_LIBRARY_VISIBILITY MyriadToolChain : public Generic_ELF {
-public:
-  MyriadToolChain(const Driver &D, const llvm::Triple &Triple,
-                  const llvm::opt::ArgList &Args);
-  ~MyriadToolChain() override;
-
-  void
-  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
-                            llvm::opt::ArgStringList &CC1Args) const override;
-  void addLibCxxIncludePaths(
-      const llvm::opt::ArgList &DriverArgs,
-      llvm::opt::ArgStringList &CC1Args) const override;
-  void addLibStdCxxIncludePaths(
-      const llvm::opt::ArgList &DriverArgs,
-      llvm::opt::ArgStringList &CC1Args) const override;
-  Tool *SelectTool(const JobAction &JA) const override;
-  unsigned GetDefaultDwarfVersion() const override { return 2; }
-  SanitizerMask getSupportedSanitizers() const override;
-
-protected:
-  Tool *buildLinker() const override;
-  bool isShaveCompilation(const llvm::Triple &T) const {
-    return T.getArch() == llvm::Triple::shave;
-  }
-
-private:
-  mutable std::unique_ptr<Tool> Compiler;
-  mutable std::unique_ptr<Tool> Assembler;
-};
-
-} // end namespace toolchains
-} // end namespace driver
-} // end namespace clang
-
-#endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_MYRIAD_H
diff --git a/clang/lib/Driver/ToolChains/Myriad.cpp b/clang/lib/Driver/ToolChains/Myriad.cpp
deleted file mode 100644
--- a/clang/lib/Driver/ToolChains/Myriad.cpp
+++ /dev/null
@@ -1,293 +0,0 @@
-//===--- Myriad.cpp - Myriad ToolChain Implementations ----------*- 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
-//
-//===----------------------------------------------------------------------===//
-
-#include "Myriad.h"
-#include "CommonArgs.h"
-#include "clang/Driver/Compilation.h"
-#include "clang/Driver/Driver.h"
-#include "clang/Driver/DriverDiagnostic.h"
-#include "clang/Driver/Options.h"
-#include "llvm/Option/ArgList.h"
-
-using namespace clang::driver;
-using namespace clang::driver::toolchains;
-using namespace clang;
-using namespace llvm::opt;
-
-using tools::addPathIfExists;
-
-void tools::SHAVE::Compiler::ConstructJob(Compilation &C, const JobAction &JA,
-                                          const InputInfo &Output,
-                                          const InputInfoList &Inputs,
-                                          const ArgList &Args,
-                                          const char *LinkingOutput) const {
-  ArgStringList CmdArgs;
-  assert(Inputs.size() == 1);
-  const InputInfo &II = Inputs[0];
-  assert(II.getType() == types::TY_C || II.getType() == types::TY_CXX ||
-         II.getType() == types::TY_PP_CXX);
-
-  if (JA.getKind() == Action::PreprocessJobClass) {
-    Args.ClaimAllArgs();
-    CmdArgs.push_back("-E");
-  } else {
-    assert(Output.getType() == types::TY_PP_Asm); // Require preprocessed asm.
-    CmdArgs.push_back("-S");
-    CmdArgs.push_back("-fno-exceptions"); // Always do this even if unspecified.
-  }
-  CmdArgs.push_back("-DMYRIAD2");
-
-  // Append all -I, -iquote, -isystem paths, defines/undefines, 'f'
-  // flags, 'g' flags, 'M' flags, optimize flags, warning options,
-  // mcpu flags, mllvm flags, and Xclang flags.
-  // These are spelled the same way in clang and moviCompile.
-  Args.AddAllArgsExcept(
-      CmdArgs,
-      {options::OPT_I_Group, options::OPT_clang_i_Group, options::OPT_std_EQ,
-       options::OPT_D, options::OPT_U, options::OPT_f_Group,
-       options::OPT_f_clang_Group, options::OPT_g_Group, options::OPT_M_Group,
-       options::OPT_O_Group, options::OPT_W_Group, options::OPT_mcpu_EQ,
-       options::OPT_mllvm, options::OPT_Xclang},
-      {options::OPT_fno_split_dwarf_inlining});
-  Args.hasArg(options::OPT_fno_split_dwarf_inlining); // Claim it if present.
-
-  // If we're producing a dependency file, and assembly is the final action,
-  // then the name of the target in the dependency file should be the '.o'
-  // file, not the '.s' file produced by this step. For example, instead of
-  //  /tmp/mumble.s: mumble.c .../someheader.h
-  // the filename on the lefthand side should be "mumble.o"
-  if (Args.getLastArg(options::OPT_MF) && !Args.getLastArg(options::OPT_MT) &&
-      C.getActions().size() == 1 &&
-      C.getActions()[0]->getKind() == Action::AssembleJobClass) {
-    Arg *A = Args.getLastArg(options::OPT_o);
-    if (A) {
-      CmdArgs.push_back("-MT");
-      CmdArgs.push_back(Args.MakeArgString(A->getValue()));
-    }
-  }
-
-  CmdArgs.push_back(II.getFilename());
-  CmdArgs.push_back("-o");
-  CmdArgs.push_back(Output.getFilename());
-
-  std::string Exec =
-      Args.MakeArgString(getToolChain().GetProgramPath("moviCompile"));
-  C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
-                                         Args.MakeArgString(Exec), CmdArgs,
-                                         Inputs, Output));
-}
-
-void tools::SHAVE::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
-                                           const InputInfo &Output,
-                                           const InputInfoList &Inputs,
-                                           const ArgList &Args,
-                                           const char *LinkingOutput) const {
-  ArgStringList CmdArgs;
-
-  assert(Inputs.size() == 1);
-  const InputInfo &II = Inputs[0];
-  assert(II.getType() == types::TY_PP_Asm); // Require preprocessed asm input.
-  assert(Output.getType() == types::TY_Object);
-
-  CmdArgs.push_back("-no6thSlotCompression");
-  const Arg *CPUArg = Args.getLastArg(options::OPT_mcpu_EQ);
-  if (CPUArg)
-    CmdArgs.push_back(
-        Args.MakeArgString("-cv:" + StringRef(CPUArg->getValue())));
-  CmdArgs.push_back("-noSPrefixing");
-  CmdArgs.push_back("-a"); // Mystery option.
-  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
-  for (const Arg *A : Args.filtered(options::OPT_I, options::OPT_isystem)) {
-    A->claim();
-    CmdArgs.push_back(
-        Args.MakeArgString(std::string("-i:") + A->getValue(0)));
-  }
-  CmdArgs.push_back(II.getFilename());
-  CmdArgs.push_back(
-      Args.MakeArgString(std::string("-o:") + Output.getFilename()));
-
-  std::string Exec =
-      Args.MakeArgString(getToolChain().GetProgramPath("moviAsm"));
-  C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
-                                         Args.MakeArgString(Exec), CmdArgs,
-                                         Inputs, Output));
-}
-
-void tools::Myriad::Linker::ConstructJob(Compilation &C, const JobAction &JA,
-                                         const InputInfo &Output,
-                                         const InputInfoList &Inputs,
-                                         const ArgList &Args,
-                                         const char *LinkingOutput) const {
-  const auto &TC =
-      static_cast<const toolchains::MyriadToolChain &>(getToolChain());
-  const llvm::Triple &T = TC.getTriple();
-  ArgStringList CmdArgs;
-  bool UseStartfiles =
-      !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
-  bool UseDefaultLibs =
-      !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs);
-  // Silence warning if the args contain both -nostdlib and -stdlib=.
-  Args.getLastArg(options::OPT_stdlib_EQ);
-
-  if (T.getArch() == llvm::Triple::sparc)
-    CmdArgs.push_back("-EB");
-  else // SHAVE assumes little-endian, and sparcel is expressly so.
-    CmdArgs.push_back("-EL");
-
-  // The remaining logic is mostly like gnutools::Linker::ConstructJob,
-  // but we never pass through a --sysroot option and various other bits.
-  // For example, there are no sanitizers (yet) nor gold linker.
-
-  // Eat some arguments that may be present but have no effect.
-  Args.ClaimAllArgs(options::OPT_g_Group);
-  Args.ClaimAllArgs(options::OPT_w);
-  Args.ClaimAllArgs(options::OPT_static_libgcc);
-
-  if (Args.hasArg(options::OPT_s)) // Pass the 'strip' option.
-    CmdArgs.push_back("-s");
-
-  CmdArgs.push_back("-o");
-  CmdArgs.push_back(Output.getFilename());
-
-  if (UseStartfiles) {
-    // If you want startfiles, it means you want the builtin crti and crtbegin,
-    // but not crt0. Myriad link commands provide their own crt0.o as needed.
-    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crti.o")));
-    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
-  }
-
-  Args.AddAllArgs(CmdArgs,
-                  {options::OPT_L, options::OPT_T_Group, options::OPT_s,
-                   options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
-
-  TC.AddFilePathLibArgs(Args, CmdArgs);
-
-  bool NeedsSanitizerDeps = addSanitizerRuntimes(TC, Args, CmdArgs);
-  AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
-
-  if (UseDefaultLibs) {
-    if (NeedsSanitizerDeps)
-      linkSanitizerRuntimeDeps(TC, CmdArgs);
-    if (C.getDriver().CCCIsCXX()) {
-      if (TC.GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) {
-        CmdArgs.push_back("-lc++");
-        CmdArgs.push_back("-lc++abi");
-      } else
-        CmdArgs.push_back("-lstdc++");
-    }
-    if (T.getOS() == llvm::Triple::RTEMS) {
-      CmdArgs.push_back("--start-group");
-      CmdArgs.push_back("-lc");
-      CmdArgs.push_back("-lgcc"); // circularly dependent on rtems
-      // You must provide your own "-L" option to enable finding these.
-      CmdArgs.push_back("-lrtemscpu");
-      CmdArgs.push_back("-lrtemsbsp");
-      CmdArgs.push_back("--end-group");
-    } else {
-      CmdArgs.push_back("-lc");
-      CmdArgs.push_back("-lgcc");
-    }
-  }
-  if (UseStartfiles) {
-    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
-    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtn.o")));
-  }
-
-  std::string Exec =
-      Args.MakeArgString(TC.GetProgramPath("sparc-myriad-rtems-ld"));
-  C.addCommand(std::make_unique<Command>(
-      JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Exec),
-      CmdArgs, Inputs, Output));
-}
-
-MyriadToolChain::MyriadToolChain(const Driver &D, const llvm::Triple &Triple,
-                                 const ArgList &Args)
-    : Generic_ELF(D, Triple, Args) {
-  // If a target of 'sparc-myriad-elf' is specified to clang, it wants to use
-  // 'sparc-myriad--elf' (note the unknown OS) as the canonical triple.
-  // This won't work to find gcc. Instead we give the installation detector an
-  // extra triple, which is preferable to further hacks of the logic that at
-  // present is based solely on getArch(). In particular, it would be wrong to
-  // choose the myriad installation when targeting a non-myriad sparc install.
-  switch (Triple.getArch()) {
-  default:
-    D.Diag(clang::diag::err_target_unsupported_arch)
-        << Triple.getArchName() << "myriad";
-    [[fallthrough]];
-  case llvm::Triple::shave:
-    return;
-  case llvm::Triple::sparc:
-  case llvm::Triple::sparcel:
-    GCCInstallation.init(Triple, Args, {"sparc-myriad-rtems"});
-  }
-
-  if (GCCInstallation.isValid()) {
-    // This directory contains crt{i,n,begin,end}.o as well as libgcc.
-    // These files are tied to a particular version of gcc.
-    SmallString<128> CompilerSupportDir(GCCInstallation.getInstallPath());
-    addPathIfExists(D, CompilerSupportDir, getFilePaths());
-  }
-  // libstd++ and libc++ must both be found in this one place.
-  addPathIfExists(D, D.Dir + "/../sparc-myriad-rtems/lib", getFilePaths());
-}
-
-MyriadToolChain::~MyriadToolChain() {}
-
-void MyriadToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
-                                                ArgStringList &CC1Args) const {
-  if (!DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
-    addSystemInclude(DriverArgs, CC1Args, getDriver().SysRoot + "/include");
-}
-
-void MyriadToolChain::addLibCxxIncludePaths(
-    const llvm::opt::ArgList &DriverArgs,
-    llvm::opt::ArgStringList &CC1Args) const {
-  std::string Path(getDriver().getInstalledDir());
-  addSystemInclude(DriverArgs, CC1Args, Path + "/../include/c++/v1");
-}
-
-void MyriadToolChain::addLibStdCxxIncludePaths(
-    const llvm::opt::ArgList &DriverArgs,
-    llvm::opt::ArgStringList &CC1Args) const {
-  StringRef LibDir = GCCInstallation.getParentLibPath();
-  const GCCVersion &Version = GCCInstallation.getVersion();
-  StringRef TripleStr = GCCInstallation.getTriple().str();
-  const Multilib &Multilib = GCCInstallation.getMultilib();
-  addLibStdCXXIncludePaths(
-      LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
-      TripleStr, Multilib.includeSuffix(), DriverArgs, CC1Args);
-}
-
-// MyriadToolChain handles several triples:
-//  {shave,sparc{,el}}-myriad-{rtems,unknown}-elf
-Tool *MyriadToolChain::SelectTool(const JobAction &JA) const {
-  // The inherited method works fine if not targeting the SHAVE.
-  if (!isShaveCompilation(getTriple()))
-    return ToolChain::SelectTool(JA);
-  switch (JA.getKind()) {
-  case Action::PreprocessJobClass:
-  case Action::CompileJobClass:
-    if (!Compiler)
-      Compiler.reset(new tools::SHAVE::Compiler(*this));
-    return Compiler.get();
-  case Action::AssembleJobClass:
-    if (!Assembler)
-      Assembler.reset(new tools::SHAVE::Assembler(*this));
-    return Assembler.get();
-  default:
-    return ToolChain::getTool(JA.getKind());
-  }
-}
-
-Tool *MyriadToolChain::buildLinker() const {
-  return new tools::Myriad::Linker(*this);
-}
-
-SanitizerMask MyriadToolChain::getSupportedSanitizers() const {
-  return SanitizerKind::Address;
-}
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/bin/.keep b/clang/test/Driver/Inputs/basic_myriad_tree/bin/.keep
deleted file mode 100644
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crtbegin.o b/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crtbegin.o
deleted file mode 100644
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crtend.o b/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crtend.o
deleted file mode 100644
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crti.o b/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crti.o
deleted file mode 100644
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crtn.o b/clang/test/Driver/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/crtn.o
deleted file mode 100644
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/sparc-myriad-rtems/include/c++/6.3.0/.keep b/clang/test/Driver/Inputs/basic_myriad_tree/sparc-myriad-rtems/include/c++/6.3.0/.keep
deleted file mode 100644
diff --git a/clang/test/Driver/Inputs/basic_myriad_tree/sparc-myriad-rtems/lib/crt0.o b/clang/test/Driver/Inputs/basic_myriad_tree/sparc-myriad-rtems/lib/crt0.o
deleted file mode 100644
diff --git a/clang/test/Driver/myriad-toolchain.c b/clang/test/Driver/myriad-toolchain.c
deleted file mode 100644
--- a/clang/test/Driver/myriad-toolchain.c
+++ /dev/null
@@ -1,90 +0,0 @@
-// RUN: %clang -### --target=sparc-myriad-rtems %s \
-// RUN: -ccc-install-dir %S/Inputs/basic_myriad_tree/bin \
-// RUN: --gcc-toolchain=%S/Inputs/basic_myriad_tree 2>&1 | FileCheck %s -check-prefix=LINK_WITH_RTEMS
-// LINK_WITH_RTEMS: Inputs{{.*}}crti.o
-// LINK_WITH_RTEMS: Inputs{{.*}}crtbegin.o
-// LINK_WITH_RTEMS: "-L{{.*}}Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0"
-// LINK_WITH_RTEMS: "-L{{.*}}Inputs/basic_myriad_tree/bin/../sparc-myriad-rtems/lib"
-// LINK_WITH_RTEMS: "--start-group" "-lc" "-lgcc" "-lrtemscpu" "-lrtemsbsp" "--end-group"
-// LINK_WITH_RTEMS: Inputs{{.*}}crtend.o
-// LINK_WITH_RTEMS: Inputs{{.*}}crtn.o
-
-// RUN: %clang -c -### --target=sparc-myriad-rtems -x c++ %s \
-// RUN: -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/basic_myriad_tree 2>&1 | FileCheck %s -check-prefix=COMPILE_CXX
-// COMPILE_CXX: "-internal-isystem" "{{.*}}/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/../../../../sparc-myriad-rtems/include/c++/6.3.0"
-// COMPILE_CXX: "-internal-isystem" "{{.*}}/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/../../../../sparc-myriad-rtems/include/c++/6.3.0/sparc-myriad-rtems"
-// COMPILE_CXX: "-internal-isystem" "{{.*}}/Inputs/basic_myriad_tree/lib/gcc/sparc-myriad-rtems/6.3.0/../../../../sparc-myriad-rtems/include/c++/6.3.0/backward"
-
-// RUN: %clang -### -E --target=sparc-myriad --sysroot=/yow %s 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=SLASH_INCLUDE
-// SLASH_INCLUDE: "-isysroot" "/yow" "-internal-isystem" "/yow/include"
-
-// RUN: %clang -### -E --target=sparc-myriad --sysroot=/yow %s -nostdinc 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=NO_SLASH_INCLUDE
-// NO_SLASH_INCLUDE: "-isysroot" "/yow"
-// NO_SLASH_INCLUDE-NOT: "-internal-isystem" "/yow/include"
-
-// RUN: not %clang -### --target=what-myriad %s 2>&1 | FileCheck %s -check-prefix=BAD_ARCH
-// BAD_ARCH: the target architecture 'what' is not supported by the target 'myriad'
-
-// Ensure that '-target shave' picks a different compiler.
-// Also check that '-I' is turned into '-i:' for the assembler.
-
-// Note that since we don't know where movi tools are installed,
-// the driver may or may not find a full path to them.
-// That is, the 0th argument will be "/path/to/my/moviCompile"
-// or just "moviCompile" depending on whether moviCompile is found.
-// As such, we test only for a trailing quote in its rendering.
-// The same goes for "moviAsm".
-
-// RUN: %clang --target=shave-myriad -mcpu=myriad2.2 -c -### %s -isystem somewhere -Icommon -Wa,-yippee 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=MOVICOMPILE
-// MOVICOMPILE: moviCompile{{(.exe)?}}" "-S" "-fno-exceptions" "-DMYRIAD2" "-mcpu=myriad2.2" "-isystem" "somewhere" "-I" "common"
-// MOVICOMPILE: moviAsm{{(.exe)?}}" "-no6thSlotCompression" "-cv:myriad2.2" "-noSPrefixing" "-a"
-// MOVICOMPILE: "-yippee" "-i:somewhere" "-i:common"
-
-// RUN: %clang --target=shave-myriad -c -### %s -DEFINE_ME -UNDEFINE_ME 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=DEFINES
-// DEFINES: "-D" "EFINE_ME" "-U" "NDEFINE_ME"
-
-// RUN: %clang --target=shave-myriad -c -### %s -Icommon -iquote quotepath -isystem syspath 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=INCLUDES
-// INCLUDES: "-iquote" "quotepath" "-isystem" "syspath"
-
-// -fno-split-dwarf-inlining is consumed but not passed to moviCompile.
-// RUN: %clang --target=shave-myriad -c -### %s -g -fno-inline-functions \
-// RUN: -fno-inline-functions-called-once -Os -Wall -MF dep.d -fno-split-dwarf-inlining \
-// RUN: -ffunction-sections -Xclang -xclangflag -mllvm -llvm-flag 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=PASSTHRU_OPTIONS
-// PASSTHRU_OPTIONS: "-g" "-fno-inline-functions" "-fno-inline-functions-called-once"
-// PASSTHRU_OPTIONS: "-Os" "-Wall" "-MF" "dep.d" "-ffunction-sections"
-// PASSTHRU_OPTIONS: "-Xclang" "-xclangflag" "-mllvm" "-llvm-flag"
-
-// RUN: %clang --target=shave-myriad -c %s -o foo.o -### -MD -MF dep.d 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=MDMF
-// MDMF: "-S" "-fno-exceptions" "-DMYRIAD2" "-MD" "-MF" "dep.d" "-MT" "foo.o"
-
-// RUN: %clang --target=shave-myriad -std=gnu++11 -mcpu=anothercpu -S %s -o foo.o -### 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=STDEQ
-// STDEQ: "-S" "-fno-exceptions" "-DMYRIAD2" "-std=gnu++11" "-mcpu=anothercpu"
-
-// RUN: %clang --target=shave-myriad -E -Ifoo %s -o foo.i -### 2>&1 \
-// RUN:   | FileCheck %s -check-prefix=PREPROCESS
-// PREPROCESS: "-E" "-DMYRIAD2" "-I" "foo"
-
-// RUN: %clang -stdlib=platform --target=sparc-myriad -### --driver-mode=g++ %s 2>&1 | FileCheck %s --check-prefix=LIBSTDCXX
-// LIBSTDCXX: "-lstdc++" "-lc" "-lgcc"
-
-// RUN: %clang -stdlib=libc++ -### --target=sparcel-myriad -S -x c++ %s 2>&1 | FileCheck %s -check-prefix=LIBCXX
-// LIBCXX: "-internal-isystem" "{{.*}}/../include/c++/v1"
-
-// RUN: %clang --target=sparc-myriad -### -nostdlib %s 2>&1 | FileCheck %s --check-prefix=NOSTDLIB
-// NOSTDLIB-NOT: crtbegin.o
-// NOSTDLIB-NOT: "-lc"
-
-// RUN: %clang -### -c -g %s --target=sparc-myriad 2>&1 | FileCheck -check-prefix=G_SPARC %s
-// G_SPARC: "-debug-info-kind=constructor" "-dwarf-version=2"
-
-// RUN: %clang -### -c %s --target=sparc-myriad-rtems -fuse-init-array 2>&1 \
-// RUN: | FileCheck -check-prefix=USE-INIT-ARRAY %s
-// USE-INIT-ARRAY-NOT: argument unused
diff --git a/clang/test/Driver/sanitizer-ld.c b/clang/test/Driver/sanitizer-ld.c
--- a/clang/test/Driver/sanitizer-ld.c
+++ b/clang/test/Driver/sanitizer-ld.c
@@ -259,15 +259,6 @@
 // CHECK-ASAN-ANDROID-SHARED-NOT: "-lpthread"
 // CHECK-ASAN-ANDROID-SHARED-NOT: "-lresolv"
 
-// RUN: %clang -### %s 2>&1 \
-// RUN:     --target=sparcel-myriad-rtems-elf -fuse-ld=ld -fsanitize=address \
-// RUN:     --sysroot=%S/Inputs/basic_myriad_tree \
-// RUN:   | FileCheck --check-prefix=CHECK-ASAN-MYRIAD %s
-//
-// CHECK-ASAN-MYRIAD: "{{(.*[^.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-ASAN-MYRIAD-NOT: "-lc"
-// CHECK-ASAN-MYRIAD: libclang_rt.asan-sparcel.a"
-
 // RUN: %clangxx -### %s 2>&1 \
 // RUN:     --target=x86_64-unknown-linux -fuse-ld=ld -stdlib=platform -lstdc++ \
 // RUN:     -fsanitize=thread \
diff --git a/llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn
--- a/llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn
@@ -87,7 +87,6 @@
     "ToolChains/MSVC.cpp",
     "ToolChains/MinGW.cpp",
     "ToolChains/MipsLinux.cpp",
-    "ToolChains/Myriad.cpp",
     "ToolChains/NaCl.cpp",
     "ToolChains/NetBSD.cpp",
     "ToolChains/OHOS.cpp",