[Analysis] Remove global state from PluginInline{Advisor,Order}Analysis.

The plugin analysis for `InlineAdvisor` and `InlineOrder` currently
relies on shared global state to keep track if the analysis is
available.
This causes issues when pipelines using plugins and pipelines not using
plugins are run in the same process.
The shared global state can be easily replaced by checking in the given
instance of `ModuleAnalysisManager` if the plugin analysis has been
registered.

Author: michele-scandale

llvm/include/llvm/Analysis/InlineAdvisor.h

@@ -287,15 +287,13 @@ class PluginInlineAdvisorAnalysis
     : public AnalysisInfoMixin<PluginInlineAdvisorAnalysis> {
 public:
   static AnalysisKey Key;
-  static bool HasBeenRegistered;
 
   typedef InlineAdvisor *(*AdvisorFactory)(Module &M,
                                            FunctionAnalysisManager &FAM,
                                            InlineParams Params,
                                            InlineContext IC);
 
   PluginInlineAdvisorAnalysis(AdvisorFactory Factory) : Factory(Factory) {
-    HasBeenRegistered = true;
     assert(Factory != nullptr &&
            "The plugin advisor factory should not be a null pointer.");
   }

llvm/include/llvm/Analysis/InlineOrder.h

@@ -59,7 +59,6 @@ class PluginInlineOrderAnalysis
                            ModuleAnalysisManager &MAM, Module &M);
 
   PluginInlineOrderAnalysis(InlineOrderFactory Factory) : Factory(Factory) {
-    HasBeenRegistered = true;
     assert(Factory != nullptr &&
            "The plugin inline order factory should not be a null pointer.");
   }
@@ -71,11 +70,7 @@ class PluginInlineOrderAnalysis
   Result run(Module &, ModuleAnalysisManager &) { return {Factory}; }
   Result getResult() { return {Factory}; }
 
-  static bool isRegistered() { return HasBeenRegistered; }
-  static void unregister() { HasBeenRegistered = false; }
-
 private:
-  static bool HasBeenRegistered;
   InlineOrderFactory Factory;
 };
 

llvm/include/llvm/IR/PassManager.h

@@ -398,6 +398,11 @@ template <typename IRUnitT, typename... ExtraArgTs> class AnalysisManager {
     AnalysisResultLists.clear();
   }
 
+  /// Returns true if the specified analysis pass is registered.
+  template <typename PassT> bool isPassRegistered() const {
+    return AnalysisPasses.count(PassT::ID());
+  }
+
   /// Get the result of an analysis pass for a given IR unit.
   ///
   /// Runs the analysis if a cached result is not available.

llvm/lib/Analysis/InlineAdvisor.cpp

@@ -199,13 +199,12 @@ void InlineAdvice::recordInliningWithCalleeDeleted() {
 
 AnalysisKey InlineAdvisorAnalysis::Key;
 AnalysisKey PluginInlineAdvisorAnalysis::Key;
-bool PluginInlineAdvisorAnalysis::HasBeenRegistered = false;
 
 bool InlineAdvisorAnalysis::Result::tryCreate(
     InlineParams Params, InliningAdvisorMode Mode,
     const ReplayInlinerSettings &ReplaySettings, InlineContext IC) {
   auto &FAM = MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
-  if (PluginInlineAdvisorAnalysis::HasBeenRegistered) {
+  if (MAM.isPassRegistered<PluginInlineAdvisorAnalysis>()) {
     auto &DA = MAM.getResult<PluginInlineAdvisorAnalysis>(M);
     Advisor.reset(DA.Factory(M, FAM, Params, IC));
     return !!Advisor;

llvm/lib/Analysis/InlineOrder.cpp

@@ -283,7 +283,6 @@ class PriorityInlineOrder : public InlineOrder<std::pair<CallBase *, int>> {
 } // namespace
 
 AnalysisKey llvm::PluginInlineOrderAnalysis::Key;
-bool llvm::PluginInlineOrderAnalysis::HasBeenRegistered;
 
 std::unique_ptr<InlineOrder<std::pair<CallBase *, int>>>
 llvm::getDefaultInlineOrder(FunctionAnalysisManager &FAM,
@@ -313,7 +312,7 @@ llvm::getDefaultInlineOrder(FunctionAnalysisManager &FAM,
 std::unique_ptr<InlineOrder<std::pair<CallBase *, int>>>
 llvm::getInlineOrder(FunctionAnalysisManager &FAM, const InlineParams &Params,
                      ModuleAnalysisManager &MAM, Module &M) {
-  if (llvm::PluginInlineOrderAnalysis::isRegistered()) {
+  if (MAM.isPassRegistered<PluginInlineOrderAnalysis>()) {
     LLVM_DEBUG(dbgs() << "    Current used priority: plugin ---- \n");
     return MAM.getResult<PluginInlineOrderAnalysis>(M).Factory(FAM, Params, MAM,
                                                                M);

llvm/unittests/Analysis/PluginInlineAdvisorAnalysisTest.cpp

@@ -87,33 +87,10 @@ struct CompilerInstance {
                                   ThinOrFullLTOPhase::None));
   }
 
-  ~CompilerInstance() {
-    // Reset the static variable that tracks if the plugin has been registered.
-    // This is needed to allow the test to run multiple times.
-    PluginInlineAdvisorAnalysis::HasBeenRegistered = false;
-  }
-
   std::string output;
   std::unique_ptr<Module> outputM;
 
-  // run with the default inliner
-  auto run_default(StringRef IR) {
-    PluginInlineAdvisorAnalysis::HasBeenRegistered = false;
-    outputM = parseAssemblyString(IR, Error, Ctx);
-    MPM.run(*outputM, MAM);
-    ASSERT_TRUE(outputM);
-    output.clear();
-    raw_string_ostream o_stream{output};
-    outputM->print(o_stream, nullptr);
-    ASSERT_TRUE(true);
-  }
-
-  // run with the dnamic inliner
-  auto run_dynamic(StringRef IR) {
-    // note typically the constructor for the DynamicInlineAdvisorAnalysis
-    // will automatically set this to true, we controll it here only to
-    // altenate between the default and dynamic inliner in our test
-    PluginInlineAdvisorAnalysis::HasBeenRegistered = true;
+  auto run(StringRef IR) {
     outputM = parseAssemblyString(IR, Error, Ctx);
     MPM.run(*outputM, MAM);
     ASSERT_TRUE(outputM);
@@ -274,14 +251,16 @@ TEST(PluginInlineAdvisorTest, PluginLoad) {
   // Skip the test if plugins are disabled.
   GTEST_SKIP();
 #endif
-  CompilerInstance CI{};
-  CI.setupPlugin();
+  CompilerInstance DefaultCI{};
+
+  CompilerInstance PluginCI{};
+  PluginCI.setupPlugin();
 
   for (StringRef IR : TestIRS) {
-    CI.run_default(IR);
-    std::string default_output = CI.output;
-    CI.run_dynamic(IR);
-    std::string dynamic_output = CI.output;
+    DefaultCI.run(IR);
+    std::string default_output = DefaultCI.output;
+    PluginCI.run(IR);
+    std::string dynamic_output = PluginCI.output;
     ASSERT_EQ(default_output, dynamic_output);
   }
 }
@@ -294,7 +273,7 @@ TEST(PluginInlineAdvisorTest, CustomAdvisor) {
   CI.setupFooOnly();
 
   for (StringRef IR : TestIRS) {
-    CI.run_dynamic(IR);
+    CI.run(IR);
     CallGraph CGraph = CallGraph(*CI.outputM);
     for (auto &node : CGraph) {
       for (auto &edge : *node.second) {

llvm/unittests/Analysis/PluginInlineOrderAnalysisTest.cpp

@@ -61,12 +61,6 @@ struct CompilerInstance {
                                   ThinOrFullLTOPhase::None));
   }
 
-  ~CompilerInstance() {
-    // Reset the static variable that tracks if the plugin has been registered.
-    // This is needed to allow the test to run multiple times.
-    PluginInlineOrderAnalysis::unregister();
-  }
-
   std::string Output;
   std::unique_ptr<Module> OutputM;