[SimplifyCFG] Common debug handling [NFC]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340997 91177308-0d34-0410-b5e6-96231b3b80d8

Author: preames

lib/Transforms/Utils/SimplifyCFG.cpp

@@ -2688,8 +2688,6 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI, unsigned BonusInstThreshold) {
     // all instructions before Cond other than DbgInfoIntrinsic are bonus
     // instructions.
     for (auto BonusInst = BB->begin(); Cond != &*BonusInst; ++BonusInst) {
-      if (isa<DbgInfoIntrinsic>(BonusInst))
-        continue;
       Instruction *NewBonusInst = BonusInst->clone();
       RemapInstruction(NewBonusInst, VMap,
                        RF_NoModuleLevelChanges | RF_IgnoreMissingLocals);
@@ -2816,12 +2814,6 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI, unsigned BonusInstThreshold) {
 
     // TODO: If BB is reachable from all paths through PredBlock, then we
     // could replace PBI's branch probabilities with BI's.
-
-    // Copy any debug value intrinsics into the end of PredBlock.
-    for (Instruction &I : *BB)
-      if (isa<DbgInfoIntrinsic>(I))
-        I.clone()->insertBefore(PBI);
-
     return true;
   }
   return false;