Separate LoopTraversal, ReachingDefAnalysis and BreakFalseDeps into their own files.

This is the one of multiple patches that fix bugzilla https://bugs.llvm.org/show_bug.cgi?id=33869
Most of the patches are intended at refactoring the existent code.

Additional relevant reviews:
https://reviews.llvm.org/D40330
https://reviews.llvm.org/D40331
https://reviews.llvm.org/D40332
https://reviews.llvm.org/D40334

Differential Revision: https://reviews.llvm.org/D40333

Change-Id: Ie5f8eb34d98cfdfae23a3072eb69b5794f0e2d56
llvm-svn: 323095
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index f07743a..c7a421b 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -446,7 +446,7 @@
 void X86PassConfig::addPreEmitPass() {
   if (getOptLevel() != CodeGenOpt::None) {
     addPass(new X86ExecutionDomainFix());
-    addPass(new BreakFalseDeps());
+    addPass(createBreakFalseDeps());
   }
 
   addPass(createX86IndirectBranchTrackingPass());