[llvm] r258663 - [LoopSimplify] Reuse changeToUnreachable

[David Majnemer via llvm-commits]

Author: majnemer
Date: Sun Jan 24 13:32:52 2016
New Revision: 258663

URL: http://llvm.org/viewvc/llvm-project?rev=258663&view=rev
Log:
[LoopSimplify] Reuse changeToUnreachable

Use existing functionality provided in changeToUnreachable instead of
reinventing it in LoopSimplify.

No functionality change is intended.

Modified:
    llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp

Modified: llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp?rev=258663&r1=258662&r2=258663&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp Sun Jan 24 13:32:52 2016
@@ -489,14 +489,9 @@ ReprocessLoop:
       DEBUG(dbgs() << "LoopSimplify: Deleting edge from dead predecessor "
                    << P->getName() << "\n");
 
-      // Inform each successor of each dead pred.
-      for (succ_iterator SI = succ_begin(P), SE = succ_end(P); SI != SE; ++SI)
-        (*SI)->removePredecessor(P);
       // Zap the dead pred's terminator and replace it with unreachable.
       TerminatorInst *TI = P->getTerminator();
-       TI->replaceAllUsesWith(UndefValue::get(TI->getType()));
-      P->getTerminator()->eraseFromParent();
-      new UnreachableInst(P->getContext(), P);
+      changeToUnreachable(TI, /*UseLLVMTrap=*/false);
       Changed = true;
     }
   }