Revert "[LoopSimplify] Fix updating LCSSA after separating nested loops."

This reverts commit r277877.
Try to appease clang-x64-ninja-win7 buildbot.

llvm-svn: 277901

llvm/lib/Transforms/Utils/LoopSimplify.cpp

@@ -376,21 +376,6 @@ static Loop *separateNestedLoop(Loop *L, BasicBlock *Preheader,
         }
       }
     }
-    // We also need to check exit blocks of the outer loop - it might be using
-    // values from what now became an inner loop.
-    SmallVector<BasicBlock*, 8> ExitBlocks;
-    NewOuter->getExitBlocks(ExitBlocks);
-    for (BasicBlock *ExitBB: ExitBlocks) {
-      for (Instruction &I : *ExitBB) {
-        for (Value *Op : I.operands()) {
-          Instruction *OpI = dyn_cast<Instruction>(Op);
-          if (!OpI || !L->contains(OpI))
-            continue;
-          WorklistSet.insert(OpI);
-        }
-      }
-    }
-
     SmallVector<Instruction *, 8> Worklist(WorklistSet.begin(),
                                            WorklistSet.end());
     formLCSSAForInstructions(Worklist, *DT, *LI);