diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/JumpThreading.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/JumpThreading.cpp b/llvm/lib/Transforms/Scalar/JumpThreading.cpp index 1b93f3441e4..d58b9c9de01 100644 --- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp +++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp @@ -718,6 +718,11 @@ bool JumpThreading::ProcessSwitchOnDuplicateCond(BasicBlock *PredBB, if (PredSI->getSuccessor(PredCase) != DestBB && DestSI->getSuccessor(i) != DestBB) continue; + + // Do not forward this if it already goes to this destination, this would + // be an infinite loop. + if (PredSI->getSuccessor(PredCase) == DestSucc) + continue; // Otherwise, we're safe to make the change. Make sure that the edge from // DestSI to DestSucc is not critical and has no PHI nodes. |
