GVN.h - reduce AliasAnalysis.h include to forward declaration. NFC.

Cleanup MemoryDependenceAnalysis.h as well - GVN.h was also implicitly including AliasAnalysis.h via this.

Fix implicit include dependencies in source files and replace legacy AliasAnalysis typedef with AAResults where necessary.

include/llvm/Analysis/MemoryDependenceAnalysis.h

@@ -19,7 +19,6 @@
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/PointerSumType.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/MemoryLocation.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Metadata.h"
@@ -35,6 +34,7 @@
 
 namespace llvm {
 
+class AAResults;
 class AssumptionCache;
 class DominatorTree;
 class Function;
@@ -355,7 +355,7 @@ private:
   ReverseDepMapType ReverseNonLocalDeps;
 
   /// Current AA implementation, just a cache.
-  AliasAnalysis &AA;
+  AAResults &AA;
   AssumptionCache ∾
   const TargetLibraryInfo &TLI;
   DominatorTree &DT;
@@ -365,7 +365,7 @@ private:
   unsigned DefaultBlockScanLimit;
 
 public:
-  MemoryDependenceResults(AliasAnalysis &AA, AssumptionCache &AC,
+  MemoryDependenceResults(AAResults &AA, AssumptionCache &AC,
                           const TargetLibraryInfo &TLI, DominatorTree &DT,
                           PhiValues &PV, unsigned DefaultBlockScanLimit)
       : AA(AA), AC(AC), TLI(TLI), DT(DT), PV(PV),

include/llvm/Transforms/Scalar/GVN.h

@@ -20,7 +20,6 @@
 #include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/InstructionPrecedenceTracking.h"
 #include "llvm/Analysis/MemoryDependenceAnalysis.h"
 #include "llvm/IR/Dominators.h"
@@ -35,6 +34,7 @@
 
 namespace llvm {
 
+class AAResults;
 class AssumptionCache;
 class BasicBlock;
 class BranchInst;
@@ -123,7 +123,7 @@ public:
   }
 
   DominatorTree &getDominatorTree() const { return *DT; }
-  AliasAnalysis *getAliasAnalysis() const { return VN.getAliasAnalysis(); }
+  AAResults *getAliasAnalysis() const { return VN.getAliasAnalysis(); }
   MemoryDependenceResults &getMemDep() const { return *MD; }
 
   bool isPREEnabled() const;
@@ -155,7 +155,7 @@ public:
         DenseMap<std::pair<uint32_t, const BasicBlock *>, uint32_t>;
     PhiTranslateMap PhiTranslateTable;
 
-    AliasAnalysis *AA = nullptr;
+    AAResults *AA = nullptr;
     MemoryDependenceResults *MD = nullptr;
     DominatorTree *DT = nullptr;
 
@@ -191,8 +191,8 @@ public:
     void add(Value *V, uint32_t num);
     void clear();
     void erase(Value *v);
-    void setAliasAnalysis(AliasAnalysis *A) { AA = A; }
-    AliasAnalysis *getAliasAnalysis() const { return AA; }
+    void setAliasAnalysis(AAResults *A) { AA = A; }
+    AAResults *getAliasAnalysis() const { return AA; }
     void setMemDep(MemoryDependenceResults *M) { MD = M; }
     void setDomTree(DominatorTree *D) { DT = D; }
     uint32_t getNextUnusedValueNumber() { return nextValueNumber; }

lib/Analysis/MemDepPrinter.cpp

@@ -10,6 +10,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/SetVector.h"
+#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/MemoryDependenceAnalysis.h"
 #include "llvm/Analysis/Passes.h"
 #include "llvm/IR/InstIterator.h"
@@ -17,6 +18,7 @@
 #include "llvm/InitializePasses.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
+
 using namespace llvm;
 
 namespace {