diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -2183,6 +2183,7 @@
 def mthreads : Joined<["-"], "mthreads">, Group<m_Group>, Flags<[DriverOption]>;
 def mcpu_EQ : Joined<["-"], "mcpu=">, Group<m_Group>;
 def mmcu_EQ : Joined<["-"], "mmcu=">, Group<m_Group>;
+def msim : Flag<["-"], "msim">, Group<m_Group>;
 def mdynamic_no_pic : Joined<["-"], "mdynamic-no-pic">, Group<m_Group>;
 def mfix_and_continue : Flag<["-"], "mfix-and-continue">, Group<clang_ignored_m_Group>;
 def mieee_fp : Flag<["-"], "mieee-fp">, Group<clang_ignored_m_Group>;
@@ -2263,9 +2264,9 @@
 def mno_lvi_cfi : Flag<["-"], "mno-lvi-cfi">, Group<m_Group>, Flags<[CoreOption,DriverOption]>,
   HelpText<"Disable control-flow mitigations for Load Value Injection (LVI)">;
 
-def mrelax : Flag<["-"], "mrelax">, Group<m_riscv_Features_Group>,
+def mrelax : Flag<["-"], "mrelax">, Group<m_Group>,
   HelpText<"Enable linker relaxation">;
-def mno_relax : Flag<["-"], "mno-relax">, Group<m_riscv_Features_Group>,
+def mno_relax : Flag<["-"], "mno-relax">, Group<m_Group>,
   HelpText<"Disable linker relaxation">;
 def msmall_data_limit_EQ : Joined<["-"], "msmall-data-limit=">, Group<m_Group>,
   Alias<G>,
diff --git a/clang/lib/Basic/Targets/MSP430.cpp b/clang/lib/Basic/Targets/MSP430.cpp
--- a/clang/lib/Basic/Targets/MSP430.cpp
+++ b/clang/lib/Basic/Targets/MSP430.cpp
@@ -29,5 +29,6 @@
                                         MacroBuilder &Builder) const {
   Builder.defineMacro("MSP430");
   Builder.defineMacro("__MSP430__");
+  Builder.defineMacro("__ELF__");
   // FIXME: defines for different 'flavours' of MCU
 }
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
@@ -1552,15 +1552,21 @@
                                 StringRef Path, const ArgList &Args,
                                 DetectedMultilibs &Result) {
   FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
-  Multilib MSP430Multilib = makeMultilib("/430");
+  Multilib WithoutExceptions = makeMultilib("/430").flag("-exceptions");
+  Multilib WithExceptions = makeMultilib("/430/exceptions").flag("+exceptions");
+
   // FIXME: when clang starts to support msp430x ISA additional logic
   // to select between multilib must be implemented
   // Multilib MSP430xMultilib = makeMultilib("/large");
 
-  Result.Multilibs.push_back(MSP430Multilib);
+  Result.Multilibs.push_back(WithoutExceptions);
+  Result.Multilibs.push_back(WithExceptions);
   Result.Multilibs.FilterOut(NonExistent);
 
   Multilib::flags_list Flags;
+  addMultilibFlag(Args.hasFlag(options::OPT_fexceptions,
+                               options::OPT_fno_exceptions, false),
+                  "exceptions", Flags);
   if (Result.Multilibs.select(Flags, Result.SelectedMultilib))
     return true;
 
diff --git a/clang/lib/Driver/ToolChains/MSP430.h b/clang/lib/Driver/ToolChains/MSP430.h
--- a/clang/lib/Driver/ToolChains/MSP430.h
+++ b/clang/lib/Driver/ToolChains/MSP430.h
@@ -40,6 +40,11 @@
   bool isPIEDefault() const override { return false; }
   bool isPICDefaultForced() const override { return true; }
 
+  UnwindLibType
+  GetUnwindLibType(const llvm::opt::ArgList &Args) const override {
+    return UNW_None;
+  }
+
 protected:
   Tool *buildLinker() const override;
 
@@ -61,6 +66,14 @@
                     const InputInfo &Output, const InputInfoList &Inputs,
                     const llvm::opt::ArgList &TCArgs,
                     const char *LinkingOutput) const override;
+
+private:
+  void AddStartFiles(bool UseExceptions, const llvm::opt::ArgList &Args,
+                     llvm::opt::ArgStringList &CmdArgs) const;
+  void AddDefaultLibs(const llvm::opt::ArgList &Args,
+                      llvm::opt::ArgStringList &CmdArgs) const;
+  void AddEndFiles(bool UseExceptions, const llvm::opt::ArgList &Args,
+                   llvm::opt::ArgStringList &CmdArgs) const;
 };
 
 void getMSP430TargetFeatures(const Driver &D, const llvm::opt::ArgList &Args,
diff --git a/clang/lib/Driver/ToolChains/MSP430.cpp b/clang/lib/Driver/ToolChains/MSP430.cpp
--- a/clang/lib/Driver/ToolChains/MSP430.cpp
+++ b/clang/lib/Driver/ToolChains/MSP430.cpp
@@ -128,7 +128,7 @@
   }
 
   SmallString<128> SysRootDir(computeSysRoot());
-  llvm::sys::path::append(SysRootDir, "lib", MultilibSuf);
+  llvm::sys::path::append(SysRootDir, "msp430-elf", "lib", MultilibSuf);
   addPathIfExists(D, SysRootDir, getFilePaths());
 }
 
@@ -138,10 +138,9 @@
 
   SmallString<128> Dir;
   if (GCCInstallation.isValid())
-    llvm::sys::path::append(Dir, GCCInstallation.getParentLibPath(), "..",
-                            GCCInstallation.getTriple().str());
+    llvm::sys::path::append(Dir, GCCInstallation.getParentLibPath(), "..");
   else
-    llvm::sys::path::append(Dir, getDriver().Dir, "..", getTriple().str());
+    llvm::sys::path::append(Dir, getDriver().Dir, "..");
 
   return std::string(Dir.str());
 }
@@ -152,8 +151,16 @@
       DriverArgs.hasArg(options::OPT_nostdlibinc))
     return;
 
+  SmallString<128> MultilibInclude(GCCInstallation.getInstallPath());
+  llvm::sys::path::append(MultilibInclude, "include");
+  addSystemInclude(DriverArgs, CC1Args, MultilibInclude.str());
+
+  SmallString<128> MultilibFixedInclude(GCCInstallation.getInstallPath());
+  llvm::sys::path::append(MultilibFixedInclude, "include-fixed");
+  addSystemInclude(DriverArgs, CC1Args, MultilibFixedInclude.str());
+
   SmallString<128> Dir(computeSysRoot());
-  llvm::sys::path::append(Dir, "include");
+  llvm::sys::path::append(Dir, "msp430-elf", "include");
   addSystemInclude(DriverArgs, CC1Args, Dir.str());
 }
 
@@ -180,6 +187,88 @@
   return new tools::msp430::Linker(*this);
 }
 
+void msp430::Linker::AddStartFiles(bool UseExceptions, const ArgList &Args,
+                                   ArgStringList &CmdArgs) const {
+  const ToolChain &ToolChain = getToolChain();
+
+  const char *crt0 = Args.hasArg(options::OPT_pg) ? "gcrt0.o" : "crt0.o";
+  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
+  const char *crtbegin = UseExceptions ? "crtbegin.o" : "crtbegin_no_eh.o";
+  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
+}
+
+void msp430::Linker::AddDefaultLibs(const llvm::opt::ArgList &Args,
+                                    llvm::opt::ArgStringList &CmdArgs) const {
+  const ToolChain &ToolChain = getToolChain();
+  const Driver &D = ToolChain.getDriver();
+
+  CmdArgs.push_back("--start-group");
+  CmdArgs.push_back(Args.MakeArgString(getHWMultLib(Args)));
+  CmdArgs.push_back("-lc");
+  AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
+  CmdArgs.push_back("-lcrt");
+
+  if (Args.hasArg(options::OPT_msim)) {
+    CmdArgs.push_back("-lsim");
+
+    // msp430-sim.ld relies on __crt0_call_exit being implicitly .refsym-ed
+    // in main() by msp430-gcc.
+    // This workaround should work seamlessly unless the compilation unit that
+    // contains main() is compiled by clang and then passed to
+    // gcc compiler driver for linkage.
+    CmdArgs.push_back("--undefined=__crt0_call_exit");
+  } else
+    CmdArgs.push_back("-lnosys");
+
+  CmdArgs.push_back("--end-group");
+  AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
+}
+
+void msp430::Linker::AddEndFiles(bool UseExceptions, const ArgList &Args,
+                                 ArgStringList &CmdArgs) const {
+  const ToolChain &ToolChain = getToolChain();
+  const Driver &D = ToolChain.getDriver();
+
+  const char *crtend = UseExceptions ? "crtend.o" : "crtend_no_eh.o";
+  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
+  AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
+}
+
+static void AddSspArgs(const ArgList &Args, ArgStringList &CmdArgs) {
+  Arg *SspFlag = Args.getLastArg(
+      options::OPT_fno_stack_protector, options::OPT_fstack_protector,
+      options::OPT_fstack_protector_all, options::OPT_fstack_protector_strong);
+
+  if (SspFlag &&
+      !SspFlag->getOption().matches(options::OPT_fno_stack_protector)) {
+    CmdArgs.push_back("-lssp_noshared");
+    CmdArgs.push_back("-lssp");
+  }
+}
+
+static void AddImplicitLinkerScript(const std::string SysRoot,
+                                    const ArgList &Args,
+                                    ArgStringList &CmdArgs) {
+  if (Args.hasArg(options::OPT_T))
+    return;
+
+  if (Args.hasArg(options::OPT_msim)) {
+    CmdArgs.push_back("-Tmsp430-sim.ld");
+    return;
+  }
+
+  const Arg *MCUArg = Args.getLastArg(options::OPT_mmcu_EQ);
+  if (!MCUArg)
+    return;
+
+  SmallString<128> MCULinkerScriptPath(SysRoot);
+  llvm::sys::path::append(MCULinkerScriptPath, "include");
+  // -L because <mcu>.ld INCLUDEs <mcu>_symbols.ld
+  CmdArgs.push_back(Args.MakeArgString("-L" + MCULinkerScriptPath));
+  CmdArgs.push_back(
+      Args.MakeArgString("-T" + StringRef(MCUArg->getValue()) + ".ld"));
+}
+
 void msp430::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                   const InputInfo &Output,
                                   const InputInfoList &Inputs,
@@ -189,44 +278,49 @@
   const Driver &D = ToolChain.getDriver();
   std::string Linker = ToolChain.GetProgramPath(getShortName());
   ArgStringList CmdArgs;
-
-  if (!D.SysRoot.empty())
-    CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
+  bool UseExceptions = Args.hasFlag(options::OPT_fexceptions,
+                                    options::OPT_fno_exceptions, false);
+  bool UseStartAndEndFiles = !Args.hasArg(options::OPT_nostdlib, options::OPT_r,
+                                          options::OPT_nostartfiles);
+
+  if (Args.hasArg(options::OPT_mrelax))
+    CmdArgs.push_back("--relax");
+  if (!Args.hasArg(options::OPT_r, options::OPT_g_Group))
+    CmdArgs.push_back("--gc-sections");
+
+  Args.AddAllArgs(CmdArgs, {
+                               options::OPT_e,
+                               options::OPT_n,
+                               options::OPT_s,
+                               options::OPT_t,
+                               options::OPT_u,
+                           });
+
+  if (UseStartAndEndFiles)
+    AddStartFiles(UseExceptions, Args, CmdArgs);
 
   Args.AddAllArgs(CmdArgs, options::OPT_L);
   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
-
-  if (!Args.hasArg(options::OPT_T)) {
-    if (const Arg *MCUArg = Args.getLastArg(options::OPT_mmcu_EQ))
-      CmdArgs.push_back(
-          Args.MakeArgString("-T" + StringRef(MCUArg->getValue()) + ".ld"));
-  } else {
-    Args.AddAllArgs(CmdArgs, options::OPT_T);
-  }
-
-  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
-    CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
-    CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
-  }
-
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
 
-  CmdArgs.push_back("--start-group");
-  CmdArgs.push_back(Args.MakeArgString(getHWMultLib(Args)));
-  CmdArgs.push_back("-lgcc");
-  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    CmdArgs.push_back("-lc");
-    CmdArgs.push_back("-lcrt");
-    CmdArgs.push_back("-lnosys");
+  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_r,
+                   options::OPT_nodefaultlibs)) {
+    AddSspArgs(Args, CmdArgs);
+    AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
+    if (!Args.hasArg(options::OPT_nolibc)) {
+      AddDefaultLibs(Args, CmdArgs);
+      AddImplicitLinkerScript(D.SysRoot, Args, CmdArgs);
+    }
   }
-  CmdArgs.push_back("--end-group");
 
-  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
-    CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
-    CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
-  }
+  if (UseStartAndEndFiles)
+    AddEndFiles(UseExceptions, Args, CmdArgs);
+
   CmdArgs.push_back("-o");
   CmdArgs.push_back(Output.getFilename());
+
+  Args.AddAllArgs(CmdArgs, options::OPT_T);
+
   C.addCommand(
       std::make_unique<Command>(JA, *this, ResponseFileSupport::AtFileCurCP(),
                                 Args.MakeArgString(Linker), CmdArgs, Inputs));
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtbegin.o
rename from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
rename to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtbegin_no_eh.o
rename from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
rename to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/430/crtn.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtend_no_eh.o
rename from clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/430/crtn.o
rename to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/exceptions/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/include-fixed/limits.h
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/include-fixed/limits.h
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/include/stddef.h
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/include/stddef.h
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/exceptions/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtend.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtbegin.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtbegin.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtbegin_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtbegin_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtend.o
rename from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtend.o
rename to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtend.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtend_no_eh.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/large/full-memory-range/exceptions/crtend_no_eh.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/include/stdio.h
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/include/stdio.h
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/430/exceptions/crt0.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/430/exceptions/crt0.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/crt0.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/crt0.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/exceptions/crt0.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/exceptions/crt0.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/crt0.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/crt0.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/exceptions/crt0.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/exceptions/crt0.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/full-memory-range/crt0.o
copy from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
copy to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/full-memory-range/crt0.o
diff --git a/clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o b/clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/full-memory-range/exceptions/crt0.o
rename from clang/test/Driver/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430/crtbegin.o
rename to clang/test/Driver/Inputs/basic_msp430_tree/msp430-elf/lib/large/full-memory-range/exceptions/crt0.o
diff --git a/clang/test/Driver/msp430-toolchain.c b/clang/test/Driver/msp430-toolchain.c
--- a/clang/test/Driver/msp430-toolchain.c
+++ b/clang/test/Driver/msp430-toolchain.c
@@ -1,78 +1,252 @@
-// A basic clang -cc1 command-line, and simple environment check.
+// Tests for the toolchain description for msp430-gcc
+// Splitting some tests into POS and NEG parts so the latter can validate
+// output fragments as large as possible for absence of some text.
+
+// Test for include paths (cannot use -###)
+
+// RUN: %clang %s -v -no-canonical-prefixes -target msp430 -E -o /dev/null \
+// RUN:   --sysroot="%S/Inputs/basic_msp430_tree" 2>&1 \
+// RUN:   | FileCheck -check-prefix=INCLUDE-DIRS %s
+// INCLUDE-DIRS: "{{.*}}clang{{.*}}" -cc1 -triple msp430
+// INCLUDE-DIRS: #include <...> search starts here:
+// INCLUDE-DIRS: {{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1{{[/\\]}}include
+// INCLUDE-DIRS: {{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1{{[/\\]}}include-fixed
+// INCLUDE-DIRS: {{.*}}/Inputs/basic_msp430_tree{{[/\\]}}msp430-elf{{[/\\]}}include
+// INCLUDE-DIRS: End of search list.
+
+// Tests for passing flags to msp430-elf-ld (not file-related)
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" > %t 2>&1
+// RUN: FileCheck -check-prefix=DEFAULT-POS %s < %t
+// RUN: FileCheck -check-prefix=DEFAULT-NEG %s < %t
+// DEFAULT-POS: clang{{.*}} "-cc1" "-triple" "msp430"
+// DEFAULT-POS: "{{.*}}msp430-elf-ld"
+// DEFAULT-POS: "--gc-sections"
+// DEFAULT-NEG-NOT: "--relax"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" \
+// RUN:   -r 2>&1 | FileCheck --check-prefixes=NO-GC-SECTIONS,RELOCATABLE-OBJECT %s
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" \
+// RUN:   -g 2>&1 | FileCheck -check-prefix=NO-GC-SECTIONS %s
+// NO-GC-SECTIONS: "{{.*}}msp430-elf-ld"
+// NO-GC-SECTIONS-NOT: "--gc-sections"
+// RELOCATABLE-OBJECT-NOT: crt0.o
+// RELOCATABLE-OBJECT-NOT: crtbegin
+// RELOCATABLE-OBJECT-NOT: crtend
+// RELOCATABLE-OBJECT-NOT: "-l{{.*}}"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" \
+// RUN:   -Wl,--some-linker-arg 2>&1 | FileCheck -check-prefix=WL-ARG %s
+// WL-ARG: "{{.*}}msp430-elf-ld"
+// WL-ARG: "--some-linker-arg"
+
+// Trivially mapped options: arbitrarily split into two disjoint groups
+// to check both "on"/present and "off"/absent state (when appropriate).
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" \
+// RUN:   -o /tmp/test.elf -r -t -z muldefs -mrelax > %t 2>&1
+// RUN: FileCheck -check-prefix=MISC-FLAGS-1-POS %s < %t
+// RUN: FileCheck -check-prefix=MISC-FLAGS-1-NEG %s < %t
+// MISC-FLAGS-1-POS: "{{.*}}msp430-elf-ld"
+// MISC-FLAGS-1-POS-DAG: "--relax"
+// MISC-FLAGS-1-POS-DAG: "-o" "/tmp/test.elf"
+// MISC-FLAGS-1-POS-DAG: "-r"
+// MISC-FLAGS-1-POS-DAG: "-t"
+// MISC-FLAGS-1-POS-DAG: "-z" "muldefs"
+// MISC-FLAGS-1-NEG: "{{.*}}msp430-elf-ld"
+// MISC-FLAGS-1-NEG-NOT: "-e{{.*}}"
+// MISC-FLAGS-1-NEG-NOT: "-s"
+// MISC-FLAGS-1-NEG-NOT: "-u"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" \
+// RUN:   -e EntryPoint -s -u __undef > %t 2>&1
+// RUN: FileCheck -check-prefix=MISC-FLAGS-2-POS %s < %t
+// RUN: FileCheck -check-prefix=MISC-FLAGS-2-NEG %s < %t
+// MISC-FLAGS-2-POS: "{{.*}}msp430-elf-ld"
+// MISC-FLAGS-2-POS: "-e" "EntryPoint" "-s" "-u" "__undef"
+// MISC-FLAGS-2-NEG: "{{.*}}msp430-elf-ld"
+// MISC-FLAGS-2-NEG-NOT: "-r"
+// MISC-FLAGS-2-NEG-NOT: "-t"
+// MISC-FLAGS-2-NEG-NOT: "-z"
+// MISC-FLAGS-2-NEG-NOT: "--relax"
+
+// Tests for -nostdlib, -nostartfiles, -nodefaultfiles and -f(no-)exceptions
 
-// RUN: %clang %s -### -no-canonical-prefixes -target msp430 --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=CC1 %s
-// CC1: clang{{.*}} "-cc1" "-triple" "msp430"
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 \
+// RUN:   --sysroot="%S/Inputs/basic_msp430_tree" > %t 2>&1
+// RUN: FileCheck -check-prefix=LIBS-DEFAULT-POS %s < %t
+// RUN: FileCheck -check-prefix=LIBS-DEFAULT-NEG %s < %t
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 \
+// RUN:   --gcc-toolchain="%S/Inputs/basic_msp430_tree" --sysroot="" 2>&1 \
+// RUN:   | FileCheck -check-prefix=LIBS-DEFAULT-GCC-TOOLCHAIN %s
+// LIBS-DEFAULT-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-DEFAULT-POS: "{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
+// LIBS-DEFAULT-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtbegin_no_eh.o"
+// LIBS-DEFAULT-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-DEFAULT-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-DEFAULT-POS: "-lgcc" "--start-group" "-lmul_none" "-lc" "-lgcc" "-lcrt" "-lnosys" "--end-group" "-lgcc"
+// LIBS-DEFAULT-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtend_no_eh.o" "-lgcc"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtbegin_no_eh.o"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "-lgcc" "--start-group" "-lmul_none" "-lc" "-lgcc" "-lcrt" "-lnosys" "--end-group"
+// LIBS-DEFAULT-GCC-TOOLCHAIN: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtend_no_eh.o" "-lgcc"
+// LIBS-DEFAULT-NEG-NOT: gcrt0.o
+// LIBS-DEFAULT-NEG-NOT: crtbegin.o
+// LIBS-DEFAULT-NEG-NOT: -lssp_nonshared
+// LIBS-DEFAULT-NEG-NOT: -lssp
+// LIBS-DEFAULT-NEG-NOT: crtend.o
+// LIBS-DEFAULT-NEG-NOT: /exceptions
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 -fexceptions \
+// RUN:   --sysroot="%S/Inputs/basic_msp430_tree" > %t 2>&1
+// RUN: FileCheck -check-prefix=LIBS-EXC-POS %s < %t
+// RUN: FileCheck -check-prefix=LIBS-EXC-NEG %s < %t
+// LIBS-EXC-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-EXC-POS: "{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430/exceptions{{/|\\\\}}crt0.o"
+// LIBS-EXC-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions{{/|\\\\}}crtbegin.o"
+// LIBS-EXC-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions"
+// LIBS-EXC-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430/exceptions"
+// LIBS-EXC-POS: "-lgcc" "--start-group" "-lmul_none" "-lc" "-lgcc" "-lcrt" "-lnosys" "--end-group"
+// LIBS-EXC-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430/exceptions{{/|\\\\}}crtend.o" "-lgcc"
+// LIBS-EXC-NEG-NOT: "{{.*}}/430"
+// LIBS-EXC-NEG-NOT: "{{.*}}430/crt{{.*}}"
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 \
-// RUN:   --gcc-toolchain=%S/Inputs/basic_msp430_tree --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430 %s
-
-// MSP430: "{{.*}}Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
-// MSP430: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430"
-// MSP430: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
-// MSP430: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
-// MSP430: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430{{/|\\\\}}crtbegin.o"
-// MSP430: "--start-group" "-lmul_none" "-lgcc" "-lc" "-lcrt" "-lnosys" "--end-group"
-// MSP430: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430{{/|\\\\}}crtend.o"
-// MSP430: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crtn.o"
+// RUN:   -fstack-protector  --sysroot="%S/Inputs/basic_msp430_tree" 2>&1 \
+// RUN:   | FileCheck -check-prefix=LIBS-SSP %s
+// LIBS-SSP: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-SSP: "{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
+// LIBS-SSP: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtbegin_no_eh.o"
+// LIBS-SSP: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-SSP: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-SSP: "-lssp_noshared" "-lssp"
+// LIBS-SSP: "-lgcc" "--start-group" "-lmul_none" "-lc" "-lgcc" "-lcrt" "-lnosys" "--end-group"
+// LIBS-SSP: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtend_no_eh.o" "-lgcc"
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -nodefaultlibs \
-// RUN:   --gcc-toolchain=%S/Inputs/basic_msp430_tree --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-NO-DFT-LIB %s
-
-// MSP430-NO-DFT-LIB: "{{.*}}Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
-// MSP430-NO-DFT-LIB: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430"
-// MSP430-NO-DFT-LIB: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
-// MSP430-NO-DFT-LIB: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
-// MSP430-NO-DFT-LIB: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430{{/|\\\\}}crtbegin.o"
-// MSP430-NO-DFT-LIB: "--start-group" "-lmul_none" "-lgcc" "--end-group"
-// MSP430-NO-DFT-LIB: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430{{/|\\\\}}crtend.o"
-// MSP430-NO-DFT-LIB: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crtn.o"
+// RUN:   --sysroot="%S/Inputs/basic_msp430_tree" > %t 2>&1
+// RUN: FileCheck -check-prefix=LIBS-NO-DFT-POS %s < %t
+// RUN: FileCheck -check-prefix=LIBS-NO-DFT-NEG %s < %t
+// LIBS-NO-DFT-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-NO-DFT-POS: "{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
+// LIBS-NO-DFT-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtbegin_no_eh.o"
+// LIBS-NO-DFT-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-NO-DFT-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-NO-DFT-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtend_no_eh.o" "-lgcc"
+// LIBS-NO-DFT-NEG-NOT: "-lc"
+// LIBS-NO-DFT-NEG-NOT: "-lcrt"
+// LIBS-NO-DFT-NEG-NOT: "-lsim"
+// LIBS-NO-DFT-NEG-NOT: "-lnosys"
+// LIBS-NO-DFT-NEG-NOT: "--start-group"
+// LIBS-NO-DFT-NEG-NOT: "--end-group"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 -nolibc \
+// RUN:   -fstack-protector --sysroot="%S/Inputs/basic_msp430_tree" > %t 2>&1
+// RUN: FileCheck -check-prefix=LIBS-NO-LIBC-POS %s < %t
+// RUN: FileCheck -check-prefix=LIBS-NO-LIBC-NEG %s < %t
+// LIBS-NO-LIBC-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-NO-LIBC-POS: "{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
+// LIBS-NO-LIBC-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtbegin_no_eh.o"
+// LIBS-NO-LIBC-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-NO-LIBC-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-NO-LIBC-POS: "-lssp_noshared" "-lssp" "-lgcc"
+// LIBS-NO-LIBC-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtend_no_eh.o" "-lgcc"
+// LIBS-NO-LIBC-NEG-NOT: "-lc"
+// LIBS-NO-LIBC-NEG-NOT: "-lcrt"
+// LIBS-NO-LIBC-NEG-NOT: "-lsim"
+// LIBS-NO-LIBC-NEG-NOT: "-lnosys"
+// LIBS-NO-LIBC-NEG-NOT: "--start-group"
+// LIBS-NO-LIBC-NEG-NOT: "--end-group"
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -nostartfiles \
-// RUN:   --gcc-toolchain=%S/Inputs/basic_msp430_tree --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-NO-START %s
-
-// MSP430-NO-START: "{{.*}}Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
-// MSP430-NO-START: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430"
-// MSP430-NO-START: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
-// MSP430-NO-START: "--start-group" "-lmul_none" "-lgcc" "-lc" "-lcrt" "-lnosys" "--end-group"
+// RUN:   --sysroot="%S/Inputs/basic_msp430_tree" > %t 2>&1
+// RUN: FileCheck -check-prefix=LIBS-NO-START-POS %s < %t
+// RUN: FileCheck -check-prefix=LIBS-NO-START-NEG %s < %t
+// LIBS-NO-START-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-NO-START-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-NO-START-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-NO-START-POS: "-lgcc" "--start-group" "-lmul_none" "-lc" "-lgcc" "-lcrt" "-lnosys" "--end-group"
+// LIBS-NO-START-NEG-NOT: crt0.o
+// LIBS-NO-START-NEG-NOT: crtbegin
+// LIBS-NO-START-NEG-NOT: crtend
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -nostdlib \
-// RUN:   --gcc-toolchain=%S/Inputs/basic_msp430_tree --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-NO-STD-LIB %s
-
-// MSP430-NO-STD-LIB: "{{.*}}Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
-// MSP430-NO-STD-LIB: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/430"
-// MSP430-NO-STD-LIB: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/7.3.1/../../..{{/|\\\\}}..{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
-// MSP430-NO-STD-LIB: "--start-group" "-lmul_none" "-lgcc" "--end-group"
+// RUN:   --sysroot="%S/Inputs/basic_msp430_tree" > %t 2>&1
+// RUN: FileCheck -check-prefix=LIBS-NO-STD-POS %s < %t
+// RUN: FileCheck -check-prefix=LIBS-NO-STD-NEG %s < %t
+// LIBS-NO-STD-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LIBS-NO-STD-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// LIBS-NO-STD-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// LIBS-NO-STD-NEG-NOT: crt0.o
+// LIBS-NO-STD-NEG-NOT: crtbegin
+// LIBS-NO-STD-NEG-NOT: crtend
+// LIBS-NO-STD-NEG-NOT: "-lc"
+// LIBS-NO-STD-NEG-NOT: "-lcrt"
+// LIBS-NO-STD-NEG-NOT: "-lnosys"
+// LIBS-NO-STD-NEG-NOT: "--start-group"
+// LIBS-NO-STD-NEG-NOT: "--end-group"
+
+// Test for linker script autodiscovery
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430g2553 \
+// RUN:   --sysroot=%S/Inputs/basic_msp430_tree 2>&1 \
+// RUN:   | FileCheck -check-prefix=LD-SCRIPT %s
+// LD-SCRIPT: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// LD-SCRIPT: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}include"
+// LD-SCRIPT: "-Tmsp430g2553.ld"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430g2553 \
+// RUN:   --sysroot=%S/Inputs/basic_msp430_tree \
+// RUN:   -T custom_script.ld 2>&1 \
+// RUN:   | FileCheck -check-prefix=CUSTOM-LD-SCRIPT %s
+// CUSTOM-LD-SCRIPT: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// CUSTOM-LD_SCRIPT-NOT: "-Tmsp430g2553.ld"
+// CUSTOM-LD-SCRIPT: "-T" "custom_script.ld"
+// CUSTOM-LD_SCRIPT-NOT: "-Tmsp430g2553.ld"
+
+// Test for compiling for simulator
+
+// RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430g2553 \
+// RUN:   -msim --sysroot=%S/Inputs/basic_msp430_tree > %t 2>&1
+// RUN: FileCheck -check-prefix=SIMULATOR-POS %s < %t
+// RUN: FileCheck -check-prefix=SIMULATOR-NEG %s < %t
+// SIMULATOR-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/../../..{{/|\\\\}}..{{/|\\\\}}bin{{/|\\\\}}msp430-elf-ld"
+// SIMULATOR-POS: "{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430{{/|\\\\}}crt0.o"
+// SIMULATOR-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtbegin_no_eh.o"
+// SIMULATOR-POS: "-L{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430"
+// SIMULATOR-POS: "-L{{.*}}/Inputs/basic_msp430_tree{{/|\\\\}}msp430-elf{{/|\\\\}}lib/430"
+// SIMULATOR-POS: "-lgcc" "--start-group" "-lmul_none" "-lc" "-lgcc" "-lcrt" "-lsim" "--undefined=__crt0_call_exit" "--end-group"
+// SIMULATOR-POS: "-Tmsp430-sim.ld"
+// SIMULATOR-POS: "{{.*}}/Inputs/basic_msp430_tree/lib/gcc/msp430-elf/8.3.1/430{{/|\\\\}}crtend_no_eh.o" "-lgcc"
+// SIMULATOR-NEG-NOT: "-lnosys"
+
+// Tests for HWMult
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430f147 --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-16BIT %s
+// RUN:   | FileCheck -check-prefix=HWMult-16BIT %s
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430f147 -mhwmult=auto --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-16BIT %s
+// RUN:   | FileCheck -check-prefix=HWMult-16BIT %s
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mhwmult=16bit --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-16BIT %s
-
-// MSP430-HWMult-16BIT: "--start-group" "-lmul_16"
+// RUN:   | FileCheck -check-prefix=HWMult-16BIT %s
+// HWMult-16BIT: "--start-group" "-lmul_16"
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430f4783 --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-32BIT %s
+// RUN:   | FileCheck -check-prefix=HWMult-32BIT %s
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mmcu=msp430f4783 -mhwmult=auto --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-32BIT %s
+// RUN:   | FileCheck -check-prefix=HWMult-32BIT %s
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mhwmult=32bit --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-32BIT %s
-
-// MSP430-HWMult-32BIT: "--start-group" "-lmul_32"
+// RUN:   | FileCheck -check-prefix=HWMult-32BIT %s
+// HWMult-32BIT: "--start-group" "-lmul_32"
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mhwmult=f5series --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-F5 %s
-// MSP430-HWMult-F5: "--start-group" "-lmul_f5"
+// RUN:   | FileCheck -check-prefix=HWMult-F5 %s
+// HWMult-F5: "--start-group" "-lmul_f5"
 
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mhwmult=none --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-NONE %s
+// RUN:   | FileCheck -check-prefix=HWMult-NONE %s
 // RUN: %clang %s -### -no-canonical-prefixes -target msp430 -mhwmult=none -mmcu=msp430f4783 --sysroot="" 2>&1 \
-// RUN:   | FileCheck -check-prefix=MSP430-HWMult-NONE %s
-
-// MSP430-HWMult-NONE: "--start-group" "-lmul_none"
+// RUN:   | FileCheck -check-prefix=HWMult-NONE %s
+// HWMult-NONE: "--start-group" "-lmul_none"