Revert "Initial implementation of optimization bisect support."

This reverts commit r267022, due to an ASan failure:

  http://lab.llvm.org:8080/green/job/clang-stage2-cmake-RgSan_check/1549

llvm-svn: 267115
diff --git a/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp b/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp
index 431ac47..4d2f4bc 100644
--- a/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp
@@ -65,7 +65,7 @@
 }
 
 bool LoopInstSimplify::runOnLoop(Loop *L, LPPassManager &LPM) {
-  if (skipLoop(L))
+  if (skipOptnoneFunction(L))
     return false;
 
   DominatorTreeWrapperPass *DTWP =