diff options
Diffstat (limited to 'lib/Transforms/Utils/BreakCriticalEdges.cpp')
| -rw-r--r-- | lib/Transforms/Utils/BreakCriticalEdges.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/Transforms/Utils/BreakCriticalEdges.cpp b/lib/Transforms/Utils/BreakCriticalEdges.cpp index 92ce50030a..803e431f76 100644 --- a/lib/Transforms/Utils/BreakCriticalEdges.cpp +++ b/lib/Transforms/Utils/BreakCriticalEdges.cpp @@ -337,6 +337,8 @@ BasicBlock *llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, } // For each unique exit block... + // FIXME: This code is functionally equivalent to the corresponding + // loop in LoopSimplify. SmallVector<BasicBlock *, 4> ExitBlocks; TIL->getExitBlocks(ExitBlocks); for (unsigned i = 0, e = ExitBlocks.size(); i != e; ++i) { @@ -348,10 +350,15 @@ BasicBlock *llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, for (pred_iterator I = pred_begin(Exit), E = pred_end(Exit); I != E; ++I) { BasicBlock *P = *I; - if (TIL->contains(P)) + if (TIL->contains(P)) { + if (isa<IndirectBrInst>(P->getTerminator())) { + Preds.clear(); + break; + } Preds.push_back(P); - else + } else { HasPredOutsideOfLoop = true; + } } // If there are any preds not in the loop, we'll need to split // the edges. The Preds.empty() check is needed because a block |