MemorySSAUpdater.h - reduce unnecessary includes to forward declarations. NFC.

Remove unnecessary MemoryAccess forward declaration as its already included from MemorySSA.h

Move implicit include dependencies down to source files.

include/llvm/Analysis/MemorySSAUpdater.h

@@ -35,12 +35,7 @@
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/Analysis/LoopIterator.h"
 #include "llvm/Analysis/MemorySSA.h"
-#include "llvm/IR/BasicBlock.h"
-#include "llvm/IR/Dominators.h"
-#include "llvm/IR/Module.h"
 #include "llvm/IR/OperandTraits.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Use.h"
@@ -55,9 +50,10 @@
 
 namespace llvm {
 
+class BasicBlock;
 class Function;
 class Instruction;
-class MemoryAccess;
+class LoopBlocksRPO;
 class LLVMContext;
 class raw_ostream;
 

lib/Analysis/MemorySSAUpdater.cpp

@@ -10,11 +10,13 @@
 //
 //===----------------------------------------------------------------===//
 #include "llvm/Analysis/MemorySSAUpdater.h"
+#include "llvm/Analysis/LoopIterator.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/Analysis/IteratedDominanceFrontier.h"
 #include "llvm/Analysis/MemorySSA.h"
+#include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/GlobalVariable.h"

lib/Transforms/Scalar/LoopSimplifyCFG.cpp

@@ -23,6 +23,7 @@
 #include "llvm/Analysis/DomTreeUpdater.h"
 #include "llvm/Analysis/GlobalsModRef.h"
 #include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Analysis/LoopIterator.h"
 #include "llvm/Analysis/LoopPass.h"
 #include "llvm/Analysis/MemorySSA.h"
 #include "llvm/Analysis/MemorySSAUpdater.h"