Revert "Recommit "[LoopPeel] Peel loops with deoptimizing exits""

This reverts commit d68b59f3ebb253ee7119a25a71c51cf19b73e030.

This is causing crashes, see D110922 for details.

1 files changed, 0 insertions, 20 deletions

diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index de6c2af..1a07697 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -39,7 +39,6 @@
 #include "llvm/IR/Value.h"
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/Support/Casting.h"
-#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Transforms/Utils/Local.h"
@@ -53,11 +52,6 @@ using namespace llvm;
 
 #define DEBUG_TYPE "basicblock-utils"
 
-static cl::opt<unsigned> MaxDeoptimizingCheckDepth(
-    "max-deopt-check-depth", cl::init(8), cl::Hidden,
-    cl::desc("Set the maximum path length when checking whether a basic block "
-             "is deoptimizing"));
-
 void llvm::DetatchDeadBlocks(
     ArrayRef<BasicBlock *> BBs,
     SmallVectorImpl<DominatorTree::UpdateType> *Updates,
@@ -491,20 +485,6 @@ void llvm::ReplaceInstWithInst(BasicBlock::InstListType &BIL,
   BI = New;
 }
 
-bool llvm::IsBlockFollowedByDeoptOrUnreachable(const BasicBlock *BB) {
-  // Remember visited blocks to avoid infinite loop
-  SmallPtrSet<const BasicBlock *, 8> VisitedBlocks;
-  unsigned Depth = 0;
-  while (BB && Depth++ < MaxDeoptimizingCheckDepth &&
-         VisitedBlocks.insert(BB).second) {
-    if (BB->getTerminatingDeoptimizeCall() ||
-        isa<UnreachableInst>(BB->getTerminator()))
-      return true;
-    BB = BB->getSingleSuccessor();
-  }
-  return false;
-}
-
 void llvm::ReplaceInstWithInst(Instruction *From, Instruction *To) {
   BasicBlock::iterator BI(From);
   ReplaceInstWithInst(From->getParent()->getInstList(), BI, To);