[Attributor][NFC] Split AbstractAttributes out of Attributor.cpp

Attributor.cpp became quite big and we need to start provide structure.
The Attributor code is now in Attributor.cpp and the classes derived
from AbstractAttribute are in AttributorAttributes.cpp. Minor changes
were required but no intended functional changes.

We also minimized includes as part of this.

Reviewed By: baziotis

Differential Revision: https://reviews.llvm.org/D76873

Author: jdoerfert

llvm/include/llvm/Transforms/IPO/Attributor.h

@@ -894,6 +894,12 @@ struct Attributor {
   /// Record that \p F is deleted after information was manifested.
   void deleteAfterManifest(Function &F) { ToBeDeletedFunctions.insert(&F); }
 
+  /// If \p V is assumed to be a constant, return it, if it is unclear yet,
+  /// return None, otherwise return `nullptr`.
+  Optional<Constant *> getAssumedConstant(const Value &V,
+                                          const AbstractAttribute &AA,
+                                          bool &UsedAssumedInformation);
+
   /// Return true if \p AA (or its context instruction) is assumed dead.
   ///
   /// If \p LivenessAA is not provided it is queried.
@@ -1916,7 +1922,10 @@ raw_ostream &operator<<(raw_ostream &OS, const AbstractState &State);
 template <typename base_ty, base_ty BestState, base_ty WorstState>
 raw_ostream &
 operator<<(raw_ostream &OS,
-           const IntegerStateBase<base_ty, BestState, WorstState> &State);
+           const IntegerStateBase<base_ty, BestState, WorstState> &S) {
+  return OS << "(" << S.getKnown() << "-" << S.getAssumed() << ")"
+            << static_cast<const AbstractState &>(S);
+}
 raw_ostream &operator<<(raw_ostream &OS, const IntegerRangeState &State);
 ///}
 
@@ -2233,6 +2242,11 @@ struct AAIsDead : public StateWrapper<BooleanState, AbstractAttribute>,
   /// Create an abstract attribute view for the position \p IRP.
   static AAIsDead &createForPosition(const IRPosition &IRP, Attributor &A);
 
+  /// Determine if \p F might catch asynchronous exceptions.
+  static bool mayCatchAsynchronousExceptions(const Function &F) {
+    return F.hasPersonalityFn() && !canSimplifyInvokeNoUnwind(&F);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;