Forward-declare Loop and LoopInfo instead of #including LoopInfo.h.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75529 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/LoopVR.h

@@ -36,11 +36,7 @@ public:
   virtual void print(std::ostream &os, const Module *) const;
   void releaseMemory();
 
-  void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.addRequiredTransitive<LoopInfo>();
-    AU.addRequiredTransitive<ScalarEvolution>();
-    AU.setPreservesAll();
-  }
+  void getAnalysisUsage(AnalysisUsage &AU) const;
 
   //===---------------------------------------------------------------------
   // Methods that are used to look up and update particular values.

include/llvm/Analysis/ScalarEvolution.h

@@ -22,7 +22,7 @@
 #define LLVM_ANALYSIS_SCALAREVOLUTION_H
 
 #include "llvm/Pass.h"
-#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Instructions.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/ValueHandle.h"
 #include "llvm/Support/Allocator.h"
@@ -30,14 +30,19 @@
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/DenseMap.h"
 #include <iosfwd>
+#include <map>
 
 namespace llvm {
   class APInt;
+  class Constant;
   class ConstantInt;
+  class DominatorTree;
   class Type;
   class ScalarEvolution;
   class TargetData;
   class LLVMContext;
+  class Loop;
+  class LoopInfo;
 
   /// SCEV - This class represents an analyzed expression in the program.  These
   /// are opaque objects that the client is not allowed to do much with

include/llvm/Analysis/ScalarEvolutionExpander.h

@@ -17,6 +17,7 @@
 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
 #include "llvm/Support/IRBuilder.h"
 #include "llvm/Support/TargetFolder.h"
+#include <set>
 
 namespace llvm {
   /// SCEVExpander - This class uses information about analyze scalars to