Revert "[JumpThreading] Thread through guards"

This reverts commit r294617.

We fail on an assert while trying to get a condition from an
unconditional branch.

llvm-svn: 295200

1 files changed, 0 insertions, 37 deletions

diff --git a/llvm/lib/Transforms/Utils/CloneFunction.cpp b/llvm/lib/Transforms/Utils/CloneFunction.cpp
index b3c062f37cc..4d33e22fecf 100644
--- a/llvm/lib/Transforms/Utils/CloneFunction.cpp
+++ b/llvm/lib/Transforms/Utils/CloneFunction.cpp
@@ -747,40 +747,3 @@ Loop *llvm::cloneLoopWithPreheader(BasicBlock *Before, BasicBlock *LoopDomBB,
 
   return NewLoop;
 }
-
-/// \brief Duplicate non-Phi instructions from the beginning of block up to
-/// StopAt instruction into a split block between BB and its predecessor.
-BasicBlock *
-llvm::DuplicateInstructionsInSplitBetween(BasicBlock *BB, BasicBlock *PredBB,
-                                          Instruction *StopAt,
-                                          ValueToValueMapTy &ValueMapping) {
-  // We are going to have to map operands from the original BB block to the new
-  // copy of the block 'NewBB'.  If there are PHI nodes in BB, evaluate them to
-  // account for entry from PredBB.
-  BasicBlock::iterator BI = BB->begin();
-  for (; PHINode *PN = dyn_cast<PHINode>(BI); ++BI)
-    ValueMapping[PN] = PN->getIncomingValueForBlock(PredBB);
-
-  BasicBlock *NewBB = SplitEdge(PredBB, BB);
-  NewBB->setName(PredBB->getName() + ".split");
-  Instruction *NewTerm = NewBB->getTerminator();
-
-  // Clone the non-phi instructions of BB into NewBB, keeping track of the
-  // mapping and using it to remap operands in the cloned instructions.
-  for (; StopAt != &*BI; ++BI) {
-    Instruction *New = BI->clone();
-    New->setName(BI->getName());
-    New->insertBefore(NewTerm);
-    ValueMapping[&*BI] = New;
-
-    // Remap operands to patch up intra-block references.
-    for (unsigned i = 0, e = New->getNumOperands(); i != e; ++i)
-      if (Instruction *Inst = dyn_cast<Instruction>(New->getOperand(i))) {
-        auto I = ValueMapping.find(Inst);
-        if (I != ValueMapping.end())
-          New->setOperand(i, I->second);
-      }
-  }
-
-  return NewBB;
-}