[NFC] Split UniqueBBID definition to a separate file.

llvm/include/llvm/CodeGen/BasicBlockSectionsProfileReader.h

@@ -19,20 +19,20 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/LineIterator.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/UniqueBBID.h"
 #include "llvm/Target/TargetMachine.h"
 
 namespace llvm {
 
 // This struct represents the cluster information for a machine basic block,
-// which is specifed by a unique ID (`MachineBasicBlock::BBID`).
+// which is specifed by a unique basic block ID.
 struct BBClusterInfo {
   // Basic block ID.
   UniqueBBID BBID;
@@ -52,27 +52,6 @@ struct FunctionPathAndClusterInfo {
   SmallVector<SmallVector<unsigned>> ClonePaths;
 };
 
-// Provides DenseMapInfo for UniqueBBID.
-template <> struct DenseMapInfo<UniqueBBID> {
-  static inline UniqueBBID getEmptyKey() {
-    unsigned EmptyKey = DenseMapInfo<unsigned>::getEmptyKey();
-    return UniqueBBID{EmptyKey, EmptyKey};
-  }
-  static inline UniqueBBID getTombstoneKey() {
-    unsigned TombstoneKey = DenseMapInfo<unsigned>::getTombstoneKey();
-    return UniqueBBID{TombstoneKey, TombstoneKey};
-  }
-  static unsigned getHashValue(const UniqueBBID &Val) {
-    std::pair<unsigned, unsigned> PairVal =
-        std::make_pair(Val.BaseID, Val.CloneID);
-    return DenseMapInfo<std::pair<unsigned, unsigned>>::getHashValue(PairVal);
-  }
-  static bool isEqual(const UniqueBBID &LHS, const UniqueBBID &RHS) {
-    return DenseMapInfo<unsigned>::isEqual(LHS.BaseID, RHS.BaseID) &&
-           DenseMapInfo<unsigned>::isEqual(LHS.CloneID, RHS.CloneID);
-  }
-};
-
 class BasicBlockSectionsProfileReader {
 public:
   friend class BasicBlockSectionsProfileReaderWrapperPass;

llvm/include/llvm/CodeGen/MachineBasicBlock.h

@@ -25,6 +25,7 @@
 #include "llvm/MC/LaneBitmask.h"
 #include "llvm/Support/BranchProbability.h"
 #include "llvm/Support/Compiler.h"
+#include "llvm/Support/UniqueBBID.h"
 #include <cassert>
 #include <cstdint>
 #include <iterator>
@@ -99,13 +100,6 @@ template <> struct DenseMapInfo<MBBSectionID> {
   }
 };
 
-// This structure represents the information for a basic block pertaining to
-// the basic block sections profile.
-struct UniqueBBID {
-  unsigned BaseID;
-  unsigned CloneID;
-};
-
 template <> struct ilist_traits<MachineInstr> {
 private:
   friend class MachineBasicBlock; // Set by the owning MachineBasicBlock.

llvm/include/llvm/Support/UniqueBBID.h

@@ -0,0 +1,50 @@
+//===- llvm/Support/UniqueBBID.h --------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Unique fixed ID assigned to basic blocks upon their creation.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_UNIQUEBBID_H
+#define LLVM_SUPPORT_UNIQUEBBID_H
+
+#include "llvm/ADT/DenseMapInfo.h"
+
+namespace llvm {
+
+// This structure represents the information for a basic block pertaining to
+// the basic block sections profile.
+struct UniqueBBID {
+  unsigned BaseID;
+  unsigned CloneID;
+};
+
+// Provides DenseMapInfo for UniqueBBID.
+template <> struct DenseMapInfo<UniqueBBID> {
+  static inline UniqueBBID getEmptyKey() {
+    unsigned EmptyKey = DenseMapInfo<unsigned>::getEmptyKey();
+    return UniqueBBID{EmptyKey, EmptyKey};
+  }
+  static inline UniqueBBID getTombstoneKey() {
+    unsigned TombstoneKey = DenseMapInfo<unsigned>::getTombstoneKey();
+    return UniqueBBID{TombstoneKey, TombstoneKey};
+  }
+  static unsigned getHashValue(const UniqueBBID &Val) {
+    std::pair<unsigned, unsigned> PairVal =
+        std::make_pair(Val.BaseID, Val.CloneID);
+    return DenseMapInfo<std::pair<unsigned, unsigned>>::getHashValue(PairVal);
+  }
+  static bool isEqual(const UniqueBBID &LHS, const UniqueBBID &RHS) {
+    return DenseMapInfo<unsigned>::isEqual(LHS.BaseID, RHS.BaseID) &&
+           DenseMapInfo<unsigned>::isEqual(LHS.CloneID, RHS.CloneID);
+  }
+};
+
+} // end namespace llvm
+
+#endif // LLVM_SUPPORT_UNIQUEBBID_H

llvm/lib/CodeGen/BasicBlockPathCloning.cpp

@@ -41,6 +41,7 @@
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"
 #include "llvm/InitializePasses.h"
+#include "llvm/Support/UniqueBBID.h"
 #include "llvm/Support/WithColor.h"
 #include "llvm/Target/TargetMachine.h"
 

llvm/lib/CodeGen/BasicBlockSections.cpp

@@ -79,6 +79,7 @@
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"
 #include "llvm/InitializePasses.h"
+#include "llvm/Support/UniqueBBID.h"
 #include "llvm/Target/TargetMachine.h"
 #include <optional>
 

llvm/lib/CodeGen/BasicBlockSectionsProfileReader.cpp

@@ -26,6 +26,7 @@
 #include "llvm/Support/LineIterator.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/UniqueBBID.h"
 #include <llvm/ADT/STLExtras.h>
 
 using namespace llvm;