diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp b/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp index 7192efe3f16b..f68cbf62b982 100644 --- a/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp +++ b/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp @@ -1028,7 +1028,13 @@ CanRedirectPredsOfEmptyBBToSucc(BasicBlock *BB, BasicBlock *Succ, if (!BB->hasNPredecessorsOrMore(2)) return false; - // Get single common predecessors of both BB and Succ + if (any_of(BBPreds, [](const BasicBlock *Pred) { + return isa<IndirectBrInst>(Pred->getTerminator()); + })) + return false; + + // Get the single common predecessor of both BB and Succ. Return false + // when there are more than one common predecessors. for (BasicBlock *SuccPred : SuccPreds) { if (BBPreds.count(SuccPred)) { if (CommonPred) @@ -1133,7 +1139,7 @@ bool llvm::TryToSimplifyUncondBranchFromEmptyBlock(BasicBlock *BB, bool BBKillable = CanPropagatePredecessorsForPHIs(BB, Succ, BBPreds); - // Even if we can not fold bB into Succ, we may be able to redirect the + // Even if we can not fold BB into Succ, we may be able to redirect the // predecessors of BB to Succ. bool BBPhisMergeable = BBKillable || |