Reland "[PassManager] Support MachineFunctionProperties (#83668)" (#87141)

Unfortunately GCC 9 rejects code in https://godbolt.org/z/zd9r5GM3e GCC
11 accepts this code.

Author: paperchalice

llvm/include/llvm/CodeGen/MachinePassManager.h

@@ -16,8 +16,6 @@
 // their respective analysis managers such as ModuleAnalysisManager and
 // FunctionAnalysisManager.
 //
-// TODO: Add MachineFunctionProperties support.
-//
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CODEGEN_MACHINEPASSMANAGER_H
@@ -44,23 +42,67 @@ using MachineFunctionAnalysisManager = AnalysisManager<MachineFunction>;
 /// automatically mixes in \c PassInfoMixin.
 template <typename DerivedT>
 struct MachinePassInfoMixin : public PassInfoMixin<DerivedT> {
-  // TODO: Add MachineFunctionProperties support.
+protected:
+  class PropertyChanger {
+    MachineFunction &MF;
+
+    template <typename T>
+    using has_get_required_properties_t =
+        decltype(std::declval<T &>().getRequiredProperties());
+
+    template <typename T>
+    using has_get_set_properties_t =
+        decltype(std::declval<T &>().getSetProperties());
+
+    template <typename T>
+    using has_get_cleared_properties_t =
+        decltype(std::declval<T &>().getClearedProperties());
+
+  public:
+    PropertyChanger(MachineFunction &MF) : MF(MF) {
+#ifndef NDEBUG
+      if constexpr (is_detected<has_get_required_properties_t,
+                                DerivedT>::value) {
+        auto &MFProps = MF.getProperties();
+        auto RequiredProperties = DerivedT::getRequiredProperties();
+        if (!MFProps.verifyRequiredProperties(RequiredProperties)) {
+          errs() << "MachineFunctionProperties required by " << DerivedT::name()
+                 << " pass are not met by function " << MF.getName() << ".\n"
+                 << "Required properties: ";
+          RequiredProperties.print(errs());
+          errs() << "\nCurrent properties: ";
+          MFProps.print(errs());
+          errs() << '\n';
+          report_fatal_error("MachineFunctionProperties check failed");
+        }
+      }
+#endif
+    }
+
+    ~PropertyChanger() {
+      if constexpr (is_detected<has_get_set_properties_t, DerivedT>::value)
+        MF.getProperties().set(DerivedT::getSetProperties());
+      if constexpr (is_detected<has_get_cleared_properties_t, DerivedT>::value)
+        MF.getProperties().reset(DerivedT::getClearedProperties());
+    }
+  };
+
+public:
+  PreservedAnalyses runImpl(MachineFunction &MF,
+                            MachineFunctionAnalysisManager &MFAM) {
+    PropertyChanger PC(MF);
+    return static_cast<DerivedT *>(this)->run(MF, MFAM);
+  }
 };
 
 namespace detail {
-struct MachinePassConcept
-    : PassConcept<MachineFunction, MachineFunctionAnalysisManager> {
-  virtual MachineFunctionProperties getRequiredProperties() const = 0;
-  virtual MachineFunctionProperties getSetProperties() const = 0;
-  virtual MachineFunctionProperties getClearedProperties() const = 0;
-};
 
-template <typename PassT> struct MachinePassModel : MachinePassConcept {
-  explicit MachinePassModel(PassT &&Pass) : Pass(std::move(Pass)) {}
-  // We have to explicitly define all the special member functions because MSVC
-  // refuses to generate them.
-  MachinePassModel(const MachinePassModel &Arg) : Pass(Arg.Pass) {}
-  MachinePassModel(MachinePassModel &&Arg) : Pass(std::move(Arg.Pass)) {}
+template <typename PassT>
+struct MachinePassModel
+    : PassModel<MachineFunction, PassT, MachineFunctionAnalysisManager> {
+  explicit MachinePassModel(PassT &&Pass)
+      : PassModel<MachineFunction, PassT, MachineFunctionAnalysisManager>(
+            std::move(Pass)) {}
 
   friend void swap(MachinePassModel &LHS, MachinePassModel &RHS) {
     using std::swap;
@@ -75,89 +117,8 @@ template <typename PassT> struct MachinePassModel : MachinePassConcept {
   MachinePassModel &operator=(const MachinePassModel &) = delete;
   PreservedAnalyses run(MachineFunction &IR,
                         MachineFunctionAnalysisManager &AM) override {
-    return Pass.run(IR, AM);
-  }
-
-  void printPipeline(
-      raw_ostream &OS,
-      function_ref<StringRef(StringRef)> MapClassName2PassName) override {
-    Pass.printPipeline(OS, MapClassName2PassName);
-  }
-
-  StringRef name() const override { return PassT::name(); }
-
-  template <typename T>
-  using has_required_t = decltype(std::declval<T &>().isRequired());
-  template <typename T>
-  static std::enable_if_t<is_detected<has_required_t, T>::value, bool>
-  passIsRequiredImpl() {
-    return T::isRequired();
+    return this->Pass.runImpl(IR, AM);
   }
-  template <typename T>
-  static std::enable_if_t<!is_detected<has_required_t, T>::value, bool>
-  passIsRequiredImpl() {
-    return false;
-  }
-  bool isRequired() const override { return passIsRequiredImpl<PassT>(); }
-
-  template <typename T>
-  using has_get_required_properties_t =
-      decltype(std::declval<T &>().getRequiredProperties());
-  template <typename T>
-  static std::enable_if_t<is_detected<has_get_required_properties_t, T>::value,
-                          MachineFunctionProperties>
-  getRequiredPropertiesImpl() {
-    return PassT::getRequiredProperties();
-  }
-  template <typename T>
-  static std::enable_if_t<!is_detected<has_get_required_properties_t, T>::value,
-                          MachineFunctionProperties>
-  getRequiredPropertiesImpl() {
-    return MachineFunctionProperties();
-  }
-  MachineFunctionProperties getRequiredProperties() const override {
-    return getRequiredPropertiesImpl<PassT>();
-  }
-
-  template <typename T>
-  using has_get_set_properties_t =
-      decltype(std::declval<T &>().getSetProperties());
-  template <typename T>
-  static std::enable_if_t<is_detected<has_get_set_properties_t, T>::value,
-                          MachineFunctionProperties>
-  getSetPropertiesImpl() {
-    return PassT::getSetProperties();
-  }
-  template <typename T>
-  static std::enable_if_t<!is_detected<has_get_set_properties_t, T>::value,
-                          MachineFunctionProperties>
-  getSetPropertiesImpl() {
-    return MachineFunctionProperties();
-  }
-  MachineFunctionProperties getSetProperties() const override {
-    return getSetPropertiesImpl<PassT>();
-  }
-
-  template <typename T>
-  using has_get_cleared_properties_t =
-      decltype(std::declval<T &>().getClearedProperties());
-  template <typename T>
-  static std::enable_if_t<is_detected<has_get_cleared_properties_t, T>::value,
-                          MachineFunctionProperties>
-  getClearedPropertiesImpl() {
-    return PassT::getClearedProperties();
-  }
-  template <typename T>
-  static std::enable_if_t<!is_detected<has_get_cleared_properties_t, T>::value,
-                          MachineFunctionProperties>
-  getClearedPropertiesImpl() {
-    return MachineFunctionProperties();
-  }
-  MachineFunctionProperties getClearedProperties() const override {
-    return getClearedPropertiesImpl<PassT>();
-  }
-
-  PassT Pass;
 };
 } // namespace detail
 
@@ -251,11 +212,12 @@ class FunctionAnalysisManagerMachineFunctionProxy
 
 class ModuleToMachineFunctionPassAdaptor
     : public PassInfoMixin<ModuleToMachineFunctionPassAdaptor> {
-  using MachinePassConcept = detail::MachinePassConcept;
-
 public:
+  using PassConceptT =
+      detail::PassConcept<MachineFunction, MachineFunctionAnalysisManager>;
+
   explicit ModuleToMachineFunctionPassAdaptor(
-      std::unique_ptr<MachinePassConcept> Pass)
+      std::unique_ptr<PassConceptT> Pass)
       : Pass(std::move(Pass)) {}
 
   /// Runs the function pass across every function in the module.
@@ -266,20 +228,41 @@ class ModuleToMachineFunctionPassAdaptor
   static bool isRequired() { return true; }
 
 private:
-  std::unique_ptr<MachinePassConcept> Pass;
+  std::unique_ptr<PassConceptT> Pass;
 };
 
 template <typename MachineFunctionPassT>
 ModuleToMachineFunctionPassAdaptor
 createModuleToMachineFunctionPassAdaptor(MachineFunctionPassT &&Pass) {
-  using PassModelT = detail::MachinePassModel<MachineFunctionPassT>;
+  using PassModelT = detail::PassModel<MachineFunction, MachineFunctionPassT,
+                                       MachineFunctionAnalysisManager>;
   // Do not use make_unique, it causes too many template instantiations,
   // causing terrible compile times.
   return ModuleToMachineFunctionPassAdaptor(
-      std::unique_ptr<detail::MachinePassConcept>(
+      std::unique_ptr<ModuleToMachineFunctionPassAdaptor::PassConceptT>(
           new PassModelT(std::forward<MachineFunctionPassT>(Pass))));
 }
 
+template <>
+template <typename PassT>
+void PassManager<MachineFunction>::addPass(PassT &&Pass) {
+  using PassModelT =
+      detail::PassModel<MachineFunction, PassT, MachineFunctionAnalysisManager>;
+  using MachinePassModelT = detail::MachinePassModel<PassT>;
+  // Do not use make_unique or emplace_back, they cause too many template
+  // instantiations, causing terrible compile times.
+  if constexpr (std::is_base_of_v<MachinePassInfoMixin<PassT>, PassT>) {
+    Passes.push_back(std::unique_ptr<PassConceptT>(
+        new MachinePassModelT(std::forward<PassT>(Pass))));
+  } else if constexpr (std::is_same_v<PassT, PassManager<MachineFunction>>) {
+    for (auto &P : Pass.Passes)
+      Passes.push_back(std::move(P));
+  } else {
+    Passes.push_back(std::unique_ptr<PassConceptT>(
+        new PassModelT(std::forward<PassT>(Pass))));
+  }
+}
+
 template <>
 PreservedAnalyses
 PassManager<MachineFunction>::run(MachineFunction &,

llvm/include/llvm/IR/PassManager.h

@@ -267,29 +267,24 @@ class PassManager : public PassInfoMixin<
     return PA;
   }
 
-  template <typename PassT>
-  LLVM_ATTRIBUTE_MINSIZE
-      std::enable_if_t<!std::is_same<PassT, PassManager>::value>
-      addPass(PassT &&Pass) {
+  // FIXME: Revert to enable_if style when gcc >= 11.1
+  template <typename PassT> LLVM_ATTRIBUTE_MINSIZE void addPass(PassT &&Pass) {
     using PassModelT =
         detail::PassModel<IRUnitT, PassT, AnalysisManagerT, ExtraArgTs...>;
-    // Do not use make_unique or emplace_back, they cause too many template
-    // instantiations, causing terrible compile times.
-    Passes.push_back(std::unique_ptr<PassConceptT>(
-        new PassModelT(std::forward<PassT>(Pass))));
-  }
-
-  /// When adding a pass manager pass that has the same type as this pass
-  /// manager, simply move the passes over. This is because we don't have use
-  /// cases rely on executing nested pass managers. Doing this could reduce
-  /// implementation complexity and avoid potential invalidation issues that may
-  /// happen with nested pass managers of the same type.
-  template <typename PassT>
-  LLVM_ATTRIBUTE_MINSIZE
-      std::enable_if_t<std::is_same<PassT, PassManager>::value>
-      addPass(PassT &&Pass) {
-    for (auto &P : Pass.Passes)
-      Passes.push_back(std::move(P));
+    if constexpr (!std::is_same_v<PassT, PassManager>) {
+      // Do not use make_unique or emplace_back, they cause too many template
+      // instantiations, causing terrible compile times.
+      Passes.push_back(std::unique_ptr<PassConceptT>(
+          new PassModelT(std::forward<PassT>(Pass))));
+    } else {
+      /// When adding a pass manager pass that has the same type as this pass
+      /// manager, simply move the passes over. This is because we don't have
+      /// use cases rely on executing nested pass managers. Doing this could
+      /// reduce implementation complexity and avoid potential invalidation
+      /// issues that may happen with nested pass managers of the same type.
+      for (auto &P : Pass.Passes)
+        Passes.push_back(std::move(P));
+    }
   }
 
   /// Returns if the pass manager contains any passes.

llvm/include/llvm/Passes/MachinePassRegistry.def

@@ -127,6 +127,8 @@ MACHINE_FUNCTION_PASS("dead-mi-elimination", DeadMachineInstructionElimPass())
 // MACHINE_FUNCTION_PASS("free-machine-function", FreeMachineFunctionPass())
 MACHINE_FUNCTION_PASS("no-op-machine-function", NoOpMachineFunctionPass())
 MACHINE_FUNCTION_PASS("print", PrintMIRPass())
+MACHINE_FUNCTION_PASS("require-all-machine-function-properties",
+                      RequireAllMachineFunctionPropertiesPass())
 #undef MACHINE_FUNCTION_PASS
 
 // After a pass is converted to new pass manager, its entry should be moved from

llvm/lib/Passes/PassBuilder.cpp

@@ -365,6 +365,33 @@ class TriggerVerifierErrorPass
   static StringRef name() { return "TriggerVerifierErrorPass"; }
 };
 
+// A pass requires all MachineFunctionProperties.
+// DO NOT USE THIS EXCEPT FOR TESTING!
+class RequireAllMachineFunctionPropertiesPass
+    : public MachinePassInfoMixin<RequireAllMachineFunctionPropertiesPass> {
+public:
+  PreservedAnalyses run(MachineFunction &, MachineFunctionAnalysisManager &) {
+    return PreservedAnalyses::none();
+  }
+
+  static MachineFunctionProperties getRequiredProperties() {
+    MachineFunctionProperties MFProps;
+    MFProps.set(MachineFunctionProperties::Property::FailedISel);
+    MFProps.set(MachineFunctionProperties::Property::FailsVerification);
+    MFProps.set(MachineFunctionProperties::Property::IsSSA);
+    MFProps.set(MachineFunctionProperties::Property::Legalized);
+    MFProps.set(MachineFunctionProperties::Property::NoPHIs);
+    MFProps.set(MachineFunctionProperties::Property::NoVRegs);
+    MFProps.set(MachineFunctionProperties::Property::RegBankSelected);
+    MFProps.set(MachineFunctionProperties::Property::Selected);
+    MFProps.set(MachineFunctionProperties::Property::TiedOpsRewritten);
+    MFProps.set(MachineFunctionProperties::Property::TracksDebugUserValues);
+    MFProps.set(MachineFunctionProperties::Property::TracksLiveness);
+    return MFProps;
+  }
+  static StringRef name() { return "RequireAllMachineFunctionPropertiesPass"; }
+};
+
 } // namespace
 
 PassBuilder::PassBuilder(TargetMachine *TM, PipelineTuningOptions PTO,

llvm/test/tools/llc/new-pm/machine-function-properties.mir

@@ -0,0 +1,12 @@
+# REQUIRES: asserts
+# RUN: not --crash llc -mtriple=x86_64-pc-linux-gnu -passes=require-all-machine-function-properties -filetype=null %s 2>&1 | FileCheck %s
+
+# CHECK: MachineFunctionProperties required by RequireAllMachineFunctionPropertiesPass pass are not met by function f.
+
+---
+name: f
+selected:        false
+body: |
+  bb.0:
+    RET 0
+...