diff --git a/clang/include/clang/Driver/ToolChain.h b/clang/include/clang/Driver/ToolChain.h
--- a/clang/include/clang/Driver/ToolChain.h
+++ b/clang/include/clang/Driver/ToolChain.h
@@ -382,9 +382,10 @@
   virtual bool useRelaxRelocations() const;
 
   /// GetDefaultStackProtectorLevel - Get the default stack protector level for
-  /// this tool chain (0=off, 1=on, 2=strong, 3=all).
-  virtual unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const {
-    return 0;
+  /// this tool chain.
+  virtual LangOptions::StackProtectorMode
+  GetDefaultStackProtectorLevel(bool KernelOrKext) const {
+    return LangOptions::SSPOff;
   }
 
   /// Get the default trivial automatic variable initialization.
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -2995,8 +2995,8 @@
     return;
 
   // -stack-protector=0 is default.
-  unsigned StackProtectorLevel = 0;
-  unsigned DefaultStackProtectorLevel =
+  LangOptions::StackProtectorMode StackProtectorLevel = LangOptions::SSPOff;
+  LangOptions::StackProtectorMode DefaultStackProtectorLevel =
       TC.GetDefaultStackProtectorLevel(KernelOrKext);
 
   if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector,
@@ -3005,7 +3005,7 @@
                                options::OPT_fstack_protector)) {
     if (A->getOption().matches(options::OPT_fstack_protector))
       StackProtectorLevel =
-          std::max<unsigned>(LangOptions::SSPOn, DefaultStackProtectorLevel);
+          std::max<>(LangOptions::SSPOn, DefaultStackProtectorLevel);
     else if (A->getOption().matches(options::OPT_fstack_protector_strong))
       StackProtectorLevel = LangOptions::SSPStrong;
     else if (A->getOption().matches(options::OPT_fstack_protector_all))
diff --git a/clang/lib/Driver/ToolChains/CrossWindows.h b/clang/lib/Driver/ToolChains/CrossWindows.h
--- a/clang/lib/Driver/ToolChains/CrossWindows.h
+++ b/clang/lib/Driver/ToolChains/CrossWindows.h
@@ -11,6 +11,7 @@
 
 #include "Cuda.h"
 #include "Gnu.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Driver/Tool.h"
 #include "clang/Driver/ToolChain.h"
 
@@ -59,8 +60,9 @@
   bool isPIEDefault() const override;
   bool isPICDefaultForced() const override;
 
-  unsigned int GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
-    return 0;
+  LangOptions::StackProtectorMode
+  GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
+    return LangOptions::SSPOff;
   }
 
   void
diff --git a/clang/lib/Driver/ToolChains/Darwin.h b/clang/lib/Driver/ToolChains/Darwin.h
--- a/clang/lib/Driver/ToolChains/Darwin.h
+++ b/clang/lib/Driver/ToolChains/Darwin.h
@@ -11,6 +11,7 @@
 
 #include "Cuda.h"
 #include "ROCm.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Driver/DarwinSDKInfo.h"
 #include "clang/Driver/Tool.h"
 #include "clang/Driver/ToolChain.h"
@@ -491,17 +492,18 @@
     return !(isTargetMacOS() && isMacosxVersionLT(10, 6));
   }
 
-  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
+  LangOptions::StackProtectorMode
+  GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
     // Stack protectors default to on for user code on 10.5,
     // and for everything in 10.6 and beyond
     if (isTargetIOSBased() || isTargetWatchOSBased())
-      return 1;
+      return LangOptions::SSPOn;
     else if (isTargetMacOS() && !isMacosxVersionLT(10, 6))
-      return 1;
+      return LangOptions::SSPOn;
     else if (isTargetMacOS() && !isMacosxVersionLT(10, 5) && !KernelOrKext)
-      return 1;
+      return LangOptions::SSPOn;
 
-    return 0;
+    return LangOptions::SSPOff;
   }
 
   void CheckObjCARC() const override;
diff --git a/clang/lib/Driver/ToolChains/Fuchsia.h b/clang/lib/Driver/ToolChains/Fuchsia.h
--- a/clang/lib/Driver/ToolChains/Fuchsia.h
+++ b/clang/lib/Driver/ToolChains/Fuchsia.h
@@ -10,6 +10,7 @@
 #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_FUCHSIA_H
 
 #include "Gnu.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Driver/Tool.h"
 #include "clang/Driver/ToolChain.h"
 
@@ -59,8 +60,9 @@
     return llvm::DebuggerKind::GDB;
   }
 
-  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
-    return 2; // SSPStrong
+  LangOptions::StackProtectorMode
+  GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
+    return LangOptions::SSPStrong;
   }
 
   std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
diff --git a/clang/lib/Driver/ToolChains/OpenBSD.h b/clang/lib/Driver/ToolChains/OpenBSD.h
--- a/clang/lib/Driver/ToolChains/OpenBSD.h
+++ b/clang/lib/Driver/ToolChains/OpenBSD.h
@@ -10,6 +10,7 @@
 #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_OPENBSD_H
 
 #include "Gnu.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Driver/Tool.h"
 #include "clang/Driver/ToolChain.h"
 
@@ -79,8 +80,9 @@
   std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component,
                             FileType Type = ToolChain::FT_Static) const override;
 
-  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
-    return 2;
+  LangOptions::StackProtectorMode
+  GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
+    return LangOptions::SSPStrong;
   }
   unsigned GetDefaultDwarfVersion() const override { return 2; }
 
diff --git a/clang/lib/Driver/ToolChains/PS4CPU.h b/clang/lib/Driver/ToolChains/PS4CPU.h
--- a/clang/lib/Driver/ToolChains/PS4CPU.h
+++ b/clang/lib/Driver/ToolChains/PS4CPU.h
@@ -10,6 +10,7 @@
 #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_PS4CPU_H
 
 #include "Gnu.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Driver/Tool.h"
 #include "clang/Driver/ToolChain.h"
 
@@ -73,8 +74,9 @@
   bool HasNativeLLVMSupport() const override;
   bool isPICDefault() const override;
 
-  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
-    return 2; // SSPStrong
+  LangOptions::StackProtectorMode
+  GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
+    return LangOptions::SSPStrong;
   }
 
   llvm::DebuggerKind getDefaultDebuggerTuning() const override {