1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/lib/Support/Windows/Process.inc b/llvm/lib/Support/Windows/Process.inc
index ce646d63609..2b2d7923143 100644
--- a/llvm/lib/Support/Windows/Process.inc
+++ b/llvm/lib/Support/Windows/Process.inc
@@ -460,3 +460,27 @@ unsigned Process::GetRandomNumber() {
     ReportLastErrorFatal("Could not generate a random number");
   return Ret;
 }
+
+typedef NTSTATUS(WINAPI* RtlGetVersionPtr)(PRTL_OSVERSIONINFOW);
+#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
+
+llvm::VersionTuple llvm::GetWindowsOSVersion() {
+  HMODULE hMod = ::GetModuleHandleW(L"ntdll.dll");
+  if (hMod) {
+    auto getVer = (RtlGetVersionPtr)::GetProcAddress(hMod, "RtlGetVersion");
+    if (getVer) {
+      RTL_OSVERSIONINFOEXW info{};
+      info.dwOSVersionInfoSize = sizeof(info);
+      if (getVer((PRTL_OSVERSIONINFOW)&info) == STATUS_SUCCESS) {
+        return llvm::VersionTuple(info.dwMajorVersion, info.dwMinorVersion, 0,
+                                  info.dwBuildNumber);
+      }
+    }
+  }
+  return llvm::VersionTuple(0, 0, 0, 0);
+}
+
+bool llvm::RunningWindows8OrGreater() {
+  // Windows 8 is version 6.2, service pack 0.
+  return GetWindowsOSVersion() >= llvm::VersionTuple(6, 2, 0, 0);
+}