[CodeGen][NPM] Port MachineBlockPlacementStats to NPM (#129853)

Author: optimisan

llvm/include/llvm/CodeGen/MachineBlockPlacement.h

@@ -30,6 +30,15 @@ class MachineBlockPlacementPass
                 function_ref<StringRef(StringRef)> MapClassName2PassName) const;
 };
 
+class MachineBlockPlacementStatsPass
+    : public PassInfoMixin<MachineBlockPlacementStatsPass> {
+
+public:
+  PreservedAnalyses run(MachineFunction &MF,
+                        MachineFunctionAnalysisManager &MFAM);
+  static bool isRequired() { return true; }
+};
+
 } // namespace llvm
 
 #endif // LLVM_CODEGEN_MACHINEBLOCKPLACEMENT_H

llvm/include/llvm/InitializePasses.h

@@ -185,7 +185,7 @@ void initializeMIRNamerPass(PassRegistry &);
 void initializeMIRPrintingPassPass(PassRegistry &);
 void initializeMachineBlockFrequencyInfoWrapperPassPass(PassRegistry &);
 void initializeMachineBlockPlacementLegacyPass(PassRegistry &);
-void initializeMachineBlockPlacementStatsPass(PassRegistry &);
+void initializeMachineBlockPlacementStatsLegacyPass(PassRegistry &);
 void initializeMachineBranchProbabilityInfoWrapperPassPass(PassRegistry &);
 void initializeMachineCFGPrinterPass(PassRegistry &);
 void initializeMachineCSELegacyPass(PassRegistry &);

llvm/include/llvm/Passes/MachinePassRegistry.def

@@ -137,6 +137,7 @@ MACHINE_FUNCTION_ANALYSIS("virtregmap", VirtRegMapAnalysis())
 #ifndef MACHINE_FUNCTION_PASS
 #define MACHINE_FUNCTION_PASS(NAME, CREATE_PASS)
 #endif
+MACHINE_FUNCTION_PASS("block-placement-stats", MachineBlockPlacementStatsPass())
 MACHINE_FUNCTION_PASS("branch-relaxation", BranchRelaxationPass())
 MACHINE_FUNCTION_PASS("dead-mi-elimination", DeadMachineInstructionElimPass())
 MACHINE_FUNCTION_PASS("detect-dead-lanes", DetectDeadLanesPass())
@@ -281,7 +282,6 @@ DUMMY_MACHINE_MODULE_PASS("mir-strip-debug", StripDebugMachineModulePass)
 #endif
 DUMMY_MACHINE_FUNCTION_PASS("bbsections-prepare", BasicBlockSectionsPass)
 DUMMY_MACHINE_FUNCTION_PASS("bbsections-profile-reader", BasicBlockSectionsProfileReaderPass)
-DUMMY_MACHINE_FUNCTION_PASS("block-placement-stats", MachineBlockPlacementStatsPass)
 DUMMY_MACHINE_FUNCTION_PASS("break-false-deps", BreakFalseDepsPass)
 DUMMY_MACHINE_FUNCTION_PASS("cfguard-longjmp", CFGuardLongjmpPass)
 DUMMY_MACHINE_FUNCTION_PASS("cfi-fixup", CFIFixupPass)

llvm/lib/CodeGen/CodeGen.cpp

@@ -73,7 +73,7 @@ void llvm::initializeCodeGen(PassRegistry &Registry) {
   initializeMIRProfileLoaderPassPass(Registry);
   initializeMachineBlockFrequencyInfoWrapperPassPass(Registry);
   initializeMachineBlockPlacementLegacyPass(Registry);
-  initializeMachineBlockPlacementStatsPass(Registry);
+  initializeMachineBlockPlacementStatsLegacyPass(Registry);
   initializeMachineCFGPrinterPass(Registry);
   initializeMachineCSELegacyPass(Registry);
   initializeMachineCombinerPass(Registry);

llvm/lib/CodeGen/MachineBlockPlacement.cpp

@@ -3839,21 +3839,35 @@ namespace {
 /// placement. This is separate from the actual placement pass so that they can
 /// be computed in the absence of any placement transformations or when using
 /// alternative placement strategies.
-class MachineBlockPlacementStats : public MachineFunctionPass {
+class MachineBlockPlacementStats {
   /// A handle to the branch probability pass.
   const MachineBranchProbabilityInfo *MBPI;
 
   /// A handle to the function-wide block frequency pass.
   const MachineBlockFrequencyInfo *MBFI;
 
+public:
+  MachineBlockPlacementStats(const MachineBranchProbabilityInfo *MBPI,
+                             const MachineBlockFrequencyInfo *MBFI)
+      : MBPI(MBPI), MBFI(MBFI) {}
+  bool run(MachineFunction &MF);
+};
+
+class MachineBlockPlacementStatsLegacy : public MachineFunctionPass {
 public:
   static char ID; // Pass identification, replacement for typeid
 
-  MachineBlockPlacementStats() : MachineFunctionPass(ID) {
-    initializeMachineBlockPlacementStatsPass(*PassRegistry::getPassRegistry());
+  MachineBlockPlacementStatsLegacy() : MachineFunctionPass(ID) {
+    initializeMachineBlockPlacementStatsLegacyPass(
+        *PassRegistry::getPassRegistry());
   }
 
-  bool runOnMachineFunction(MachineFunction &F) override;
+  bool runOnMachineFunction(MachineFunction &F) override {
+    auto *MBPI =
+        &getAnalysis<MachineBranchProbabilityInfoWrapperPass>().getMBPI();
+    auto *MBFI = &getAnalysis<MachineBlockFrequencyInfoWrapperPass>().getMBFI();
+    return MachineBlockPlacementStats(MBPI, MBFI).run(F);
+  }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<MachineBranchProbabilityInfoWrapperPass>();
@@ -3865,28 +3879,35 @@ class MachineBlockPlacementStats : public MachineFunctionPass {
 
 } // end anonymous namespace
 
-char MachineBlockPlacementStats::ID = 0;
+char MachineBlockPlacementStatsLegacy::ID = 0;
 
-char &llvm::MachineBlockPlacementStatsID = MachineBlockPlacementStats::ID;
+char &llvm::MachineBlockPlacementStatsID = MachineBlockPlacementStatsLegacy::ID;
 
-INITIALIZE_PASS_BEGIN(MachineBlockPlacementStats, "block-placement-stats",
+INITIALIZE_PASS_BEGIN(MachineBlockPlacementStatsLegacy, "block-placement-stats",
                       "Basic Block Placement Stats", false, false)
 INITIALIZE_PASS_DEPENDENCY(MachineBranchProbabilityInfoWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(MachineBlockFrequencyInfoWrapperPass)
-INITIALIZE_PASS_END(MachineBlockPlacementStats, "block-placement-stats",
+INITIALIZE_PASS_END(MachineBlockPlacementStatsLegacy, "block-placement-stats",
                     "Basic Block Placement Stats", false, false)
 
-bool MachineBlockPlacementStats::runOnMachineFunction(MachineFunction &F) {
+PreservedAnalyses
+MachineBlockPlacementStatsPass::run(MachineFunction &MF,
+                                    MachineFunctionAnalysisManager &MFAM) {
+  auto &MBPI = MFAM.getResult<MachineBranchProbabilityAnalysis>(MF);
+  auto &MBFI = MFAM.getResult<MachineBlockFrequencyAnalysis>(MF);
+
+  MachineBlockPlacementStats(&MBPI, &MBFI).run(MF);
+  return PreservedAnalyses::all();
+}
+
+bool MachineBlockPlacementStats::run(MachineFunction &F) {
   // Check for single-block functions and skip them.
   if (std::next(F.begin()) == F.end())
     return false;
 
   if (!isFunctionInPrintList(F.getName()))
     return false;
 
-  MBPI = &getAnalysis<MachineBranchProbabilityInfoWrapperPass>().getMBPI();
-  MBFI = &getAnalysis<MachineBlockFrequencyInfoWrapperPass>().getMBFI();
-
   for (MachineBasicBlock &MBB : F) {
     BlockFrequency BlockFreq = MBFI->getBlockFreq(&MBB);
     Statistic &NumBranches =