move the 'SimplifyDemandedFoo' methods out to their own file, cutting 1K lines out of instcombine.cpp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92465 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstCombine.h b/lib/Transforms/InstCombine/InstCombine.h
index 4af0236..d4d26f8 100644
--- a/lib/Transforms/InstCombine/InstCombine.h
+++ b/lib/Transforms/InstCombine/InstCombine.h
@@ -74,11 +74,8 @@
   
   bool DoOneIteration(Function &F, unsigned ItNum);
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.addPreservedID(LCSSAID);
-    AU.setPreservesCFG();
-  }
-
+  virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+                                 
   TargetData *getTargetData() const { return TD; }
 
   // Visitation implementation - Implement instruction combining for different