1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/JumpThreading.cpp b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
index 6ad782f5089..b87f4766e8d 100644
--- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
@@ -260,6 +260,11 @@ static unsigned getJumpThreadDuplicationCost(const BasicBlock *BB,
     if (isa<BitCastInst>(I) && I->getType()->isPointerTy())
       continue;
 
+    // Bail out if this instruction gives back a token type, it is not possible
+    // to duplicate it if it used outside this BB.
+    if (I->getType()->isTokenTy() && I->isUsedOutsideOfBlock(BB))
+      return ~0U;
+
     // All other instructions count for at least one unit.
     ++Size;