TailDuplicator: Fix crash after r278974

Some inputs would after r278974 without this fix (see
http://lab.llvm.org:8080/green/job/clang-stage2-cmake-RgSan_build/2733/console
for an example)

llvm-svn: 279022

diff --git a/llvm/lib/CodeGen/TailDuplicator.cpp b/llvm/lib/CodeGen/TailDuplicator.cpp
index a93d13c..2d0b1ac 100644 (file)
--- a/llvm/lib/CodeGen/TailDuplicator.cpp
+++ b/llvm/lib/CodeGen/TailDuplicator.cpp
@@ -673,7 +673,7 @@ bool TailDuplicator::duplicateSimpleBB(
                  << "From simple Succ: " << *TailBB);
 
     MachineBasicBlock *NewTarget = *TailBB->succ_begin();
-    MachineBasicBlock *NextBB = &*std::next(PredBB->getIterator());
+    MachineBasicBlock *NextBB = PredBB->getNextNode();
 
     // Make PredFBB explicit.
     if (PredCond.empty())