[PM/AA] Hoist the SCEV-AA interface to its own header and pull the

creation function into that header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245013 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/ScalarEvolutionAliasAnalysis.cpp

@@ -19,47 +19,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Analysis/Passes.h"
-#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Analysis/ScalarEvolutionExpressions.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
+#include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
 using namespace llvm;
 
-namespace {
-  /// ScalarEvolutionAliasAnalysis - This is a simple alias analysis
-  /// implementation that uses ScalarEvolution to answer queries.
-  class ScalarEvolutionAliasAnalysis : public FunctionPass,
-                                       public AliasAnalysis {
-    ScalarEvolution *SE;
-
-  public:
-    static char ID; // Class identification, replacement for typeinfo
-    ScalarEvolutionAliasAnalysis() : FunctionPass(ID), SE(nullptr) {
-      initializeScalarEvolutionAliasAnalysisPass(
-        *PassRegistry::getPassRegistry());
-    }
-
-    /// getAdjustedAnalysisPointer - This method is used when a pass implements
-    /// an analysis interface through multiple inheritance.  If needed, it
-    /// should override this to adjust the this pointer as needed for the
-    /// specified pass info.
-    void *getAdjustedAnalysisPointer(AnalysisID PI) override {
-      if (PI == &AliasAnalysis::ID)
-        return (AliasAnalysis*)this;
-      return this;
-    }
-
-  private:
-    void getAnalysisUsage(AnalysisUsage &AU) const override;
-    bool runOnFunction(Function &F) override;
-    AliasResult alias(const MemoryLocation &LocA,
-                      const MemoryLocation &LocB) override;
-
-    Value *GetBaseValue(const SCEV *S);
-  };
-}  // End of anonymous namespace
-
 // Register this pass...
 char ScalarEvolutionAliasAnalysis::ID = 0;
 INITIALIZE_AG_PASS_BEGIN(ScalarEvolutionAliasAnalysis, AliasAnalysis, "scev-aa",