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Diffstat (limited to 'include/llvm/Transforms/Utils/BasicBlockUtils.h')
| -rw-r--r-- | include/llvm/Transforms/Utils/BasicBlockUtils.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h index 90eabef12f..d0a3773d11 100644 --- a/include/llvm/Transforms/Utils/BasicBlockUtils.h +++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h @@ -174,6 +174,23 @@ BasicBlock *SplitBlockPredecessors(BasicBlock *BB, BasicBlock *const *Preds, unsigned NumPreds, const char *Suffix, Pass *P = 0); +/// SplitLandingPadPredecessors - This method transforms the landing pad, +/// OrigBB, by introducing two new basic blocks into the function. One of those +/// new basic blocks gets the predecessors listed in Preds. The other basic +/// block gets the remaining predecessors of OrigBB. The landingpad instruction +/// OrigBB is clone into both of the new basic blocks. The new blocks are given +/// the suffixes 'Suffix1' and 'Suffix2', and are returned in the NewBBs vector. +/// +/// This currently updates the LLVM IR, AliasAnalysis, DominatorTree, +/// DominanceFrontier, LoopInfo, and LCCSA but no other analyses. In particular, +/// it does not preserve LoopSimplify (because it's complicated to handle the +/// case where one of the edges being split is an exit of a loop with other +/// exits). +/// +void SplitLandingPadPredecessors(BasicBlock *OrigBB,ArrayRef<BasicBlock*> Preds, + const char *Suffix, const char *Suffix2, + Pass *P, SmallVectorImpl<BasicBlock*> &NewBBs); + /// FoldReturnIntoUncondBranch - This method duplicates the specified return /// instruction into a predecessor which ends in an unconditional branch. If /// the return instruction returns a value defined by a PHI, propagate the |