Index: include/llvm/Support/Path.h
===================================================================
--- include/llvm/Support/Path.h
+++ include/llvm/Support/Path.h
@@ -317,6 +317,14 @@
 /// @result True if a home directory is set, false otherwise.
 bool home_directory(SmallVectorImpl<char> &result);
 
+/// @brief Get the home directory of an arbitrary user.
+///
+/// @param user The username to look up the home directory for.  Must be null
+/// terminated.
+/// @param result Holds the resulting path name.
+/// @result True if a home directory is set, false otherwise.
+bool home_directory(StringRef user, SmallVectorImpl<char> &result);
+
 /// @brief Has root name?
 ///
 /// root_name != ""
Index: lib/Support/Unix/Path.inc
===================================================================
--- lib/Support/Unix/Path.inc
+++ lib/Support/Unix/Path.inc
@@ -678,6 +678,16 @@
   return false;
 }
 
+bool home_directory(StringRef user, SmallVectorImpl<char> &result) {
+  result.clear();
+  struct passwd *user_entry = ::getpwnam(user.data());
+  if (user_entry == nullptr)
+    return false;
+
+  result.append(user_entry->pw_dir);
+  return true;
+}
+
 } // end namespace path
 
 } // end namespace sys
Index: lib/Support/Windows/Path.inc
===================================================================
--- lib/Support/Windows/Path.inc
+++ lib/Support/Windows/Path.inc
@@ -27,6 +27,7 @@
 // after Windows.h to make sure it picks up our definition of _WIN32_WINNT
 #include "WindowsSupport.h"
 #include <shlobj.h>
+#include <sddl.h>
 
 #undef max
 
@@ -867,6 +868,59 @@
   return true;
 }
 
+bool home_directory(StringRef user, SmallVectorImpl<char> &result) {
+  char sid_buf[SECURITY_MAX_SID_SIZE];
+  SID *sid = reinterpret_cast<SID *>(sid_buf);
+  DWORD sid_size = SECURITY_MAX_SID_SIZE;
+  DWORD cch_referenced_domain = 0;
+  SID_NAME_USE sid_name_use;
+  bool success = false;
+  char *string_sid = nullptr;
+  std::string reg_path;
+  HKEY hkey = nullptr;
+
+  ::LookupAccountName(nullptr, user.data(), sid, &sid_size, nullptr,
+                      &cch_referenced_domain, &sid_name_use);
+  if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+    goto finish;
+
+  result.resize(cch_referenced_domain);
+  if (!::LookupAccountName(nullptr, user.data(), sid, &sid_size, &result[0],
+                           &cch_referenced_domain, &sid_name_use))
+    goto finish;
+
+  if (!ConvertSidToStringSid(sid, &string_sid))
+    goto finish;
+
+  reg_path.assign(
+      "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\ProfileList\\");
+  reg_path.append(string_sid);
+  if (RegOpenKey(HKEY_LOCAL_MACHINE, reg_path.c_str(), &hkey) != ERROR_SUCCESS)
+    goto finish;
+
+  DWORD cbData = 0;
+  DWORD key_type;
+  if (RegQueryValueEx(hkey, "ProfileImagePath", NULL, &key_type, NULL,
+                      &cbData) != ERROR_SUCCESS)
+    goto finish;
+
+  result.resize(cbData);
+  uint8_t *buf_data = reinterpret_cast<uint8_t *>(result.data());
+  if (RegQueryValueEx(hkey, "ProfileImagePath", NULL, &key_type, buf_data,
+                      &cbData) != ERROR_SUCCESS)
+    goto finish;
+
+  success = true;
+
+finish:
+  if (string_sid)
+    ::LocalFree(string_sid);
+  if (hkey)
+    ::RegCloseKey(hkey);
+
+  return success;
+}
+
 } // end namespace path
 
 namespace windows {