Index: clang-tidy/ClangTidy.cpp
===================================================================
--- clang-tidy/ClangTidy.cpp
+++ clang-tidy/ClangTidy.cpp
@@ -289,11 +289,12 @@
 
 typedef std::vector<std::pair<std::string, bool>> CheckersList;
 
-static CheckersList getCheckersControlList(GlobList &Filter) {
+static CheckersList getCheckersControlList(GlobList &Filter,
+                                           bool IncludeExperimental) {
   CheckersList List;
 
   const auto &RegisteredCheckers =
-      AnalyzerOptions::getRegisteredCheckers(/*IncludeExperimental=*/false);
+      AnalyzerOptions::getRegisteredCheckers(IncludeExperimental);
   bool AnalyzerChecksEnabled = false;
   for (StringRef CheckName : RegisteredCheckers) {
     std::string ClangTidyCheckName((AnalyzerCheckNamePrefix + CheckName).str());
@@ -359,7 +360,8 @@
       Context.getOptions().AnalyzeTemporaryDtors ? "true" : "false";
 
   GlobList &Filter = Context.getChecksFilter();
-  AnalyzerOptions->CheckersControlList = getCheckersControlList(Filter);
+  AnalyzerOptions->CheckersControlList =
+      getCheckersControlList(Filter, *Context.getOptions().EnableAlphaChecks);
   if (!AnalyzerOptions->CheckersControlList.empty()) {
     setStaticAnalyzerCheckerOpts(Context.getOptions(), AnalyzerOptions);
     AnalyzerOptions->AnalysisStoreOpt = RegionStoreModel;
@@ -384,7 +386,8 @@
       CheckNames.push_back(CheckFactory.first);
   }
 
-  for (const auto &AnalyzerCheck : getCheckersControlList(Filter))
+  for (const auto &AnalyzerCheck :
+       getCheckersControlList(Filter, *Context.getOptions().EnableAlphaChecks))
     CheckNames.push_back(AnalyzerCheckNamePrefix + AnalyzerCheck.first);
 
   std::sort(CheckNames.begin(), CheckNames.end());
Index: clang-tidy/ClangTidyOptions.h
===================================================================
--- clang-tidy/ClangTidyOptions.h
+++ clang-tidy/ClangTidyOptions.h
@@ -75,6 +75,9 @@
   /// \brief Turns on temporary destructor-based analysis.
   llvm::Optional<bool> AnalyzeTemporaryDtors;
 
+  /// \brief Turns on experimental alpha checkers from static-analyzer.
+  llvm::Optional<bool> EnableAlphaChecks;
+
   /// \brief Specifies the name or e-mail of the user running clang-tidy.
   ///
   /// This option is used, for example, to place the correct user name in TODO()
Index: clang-tidy/ClangTidyOptions.cpp
===================================================================
--- clang-tidy/ClangTidyOptions.cpp
+++ clang-tidy/ClangTidyOptions.cpp
@@ -89,6 +89,7 @@
     IO.mapOptional("WarningsAsErrors", Options.WarningsAsErrors);
     IO.mapOptional("HeaderFilterRegex", Options.HeaderFilterRegex);
     IO.mapOptional("AnalyzeTemporaryDtors", Options.AnalyzeTemporaryDtors);
+    IO.mapOptional("EnableAlphaChecks", Options.EnableAlphaChecks);
     IO.mapOptional("User", Options.User);
     IO.mapOptional("CheckOptions", NOpts->Options);
     IO.mapOptional("ExtraArgs", Options.ExtraArgs);
@@ -109,6 +110,7 @@
   Options.HeaderFilterRegex = "";
   Options.SystemHeaders = false;
   Options.AnalyzeTemporaryDtors = false;
+  Options.EnableAlphaChecks = false;
   Options.User = llvm::None;
   for (ClangTidyModuleRegistry::iterator I = ClangTidyModuleRegistry::begin(),
                                          E = ClangTidyModuleRegistry::end();
@@ -148,6 +150,7 @@
   overrideValue(Result.HeaderFilterRegex, Other.HeaderFilterRegex);
   overrideValue(Result.SystemHeaders, Other.SystemHeaders);
   overrideValue(Result.AnalyzeTemporaryDtors, Other.AnalyzeTemporaryDtors);
+  overrideValue(Result.EnableAlphaChecks, Other.EnableAlphaChecks);
   overrideValue(Result.User, Other.User);
   mergeVectors(Result.ExtraArgs, Other.ExtraArgs);
   mergeVectors(Result.ExtraArgsBefore, Other.ExtraArgsBefore);
Index: clang-tidy/tool/ClangTidyMain.cpp
===================================================================
--- clang-tidy/tool/ClangTidyMain.cpp
+++ clang-tidy/tool/ClangTidyMain.cpp
@@ -180,6 +180,14 @@
                                            cl::init(false),
                                            cl::cat(ClangTidyCategory));
 
+static cl::opt<bool> EnableAlphaChecks("enable-alpha-checks", cl::desc(R"(
+Enable experimental clang-analyzer-alpha-* checks.
+This option overrides the value read from a
+.clang-tidy file.
+)"),
+                                       cl::init(false),
+                                       cl::cat(ClangTidyCategory));
+
 static cl::opt<std::string> ExportFixes("export-fixes", cl::desc(R"(
 YAML file to store suggested fixes in. The
 stored fixes can be applied to the input source
@@ -272,6 +280,7 @@
   DefaultOptions.HeaderFilterRegex = HeaderFilter;
   DefaultOptions.SystemHeaders = SystemHeaders;
   DefaultOptions.AnalyzeTemporaryDtors = AnalyzeTemporaryDtors;
+  DefaultOptions.EnableAlphaChecks = EnableAlphaChecks;
   DefaultOptions.User = llvm::sys::Process::GetEnv("USER");
   // USERNAME is used on Windows.
   if (!DefaultOptions.User)
Index: test/clang-tidy/enable-alpha-checks.cpp
===================================================================
--- /dev/null
+++ test/clang-tidy/enable-alpha-checks.cpp
@@ -0,0 +1,2 @@
+// RUN: clang-tidy -checks=* -list-checks | not grep 'clang-analyzer-alpha'
+// RUN: clang-tidy -checks=* -list-checks -enable-alpha-checks | grep 'clang-analyzer-alpha'