diff options
Diffstat (limited to 'include/llvm/Transforms')
| -rw-r--r-- | include/llvm/Transforms/Utils/BasicBlockUtils.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h index e766d72..47d6895 100644 --- a/include/llvm/Transforms/Utils/BasicBlockUtils.h +++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h @@ -43,9 +43,11 @@ void FoldSingleEntryPHINodes(BasicBlock *BB); /// it is ultimately unused or if it reaches an unused cycle. void DeleteDeadPHIs(BasicBlock *BB); -/// MergeBlockIntoPredecessor - Attempts to merge a block into its predecessor, -/// if possible. The return value indicates success or failure. -bool MergeBlockIntoPredecessor(BasicBlock* BB, Pass* P = 0); +/// MergeBlockIntoPredecessor - Folds a basic block into its predecessor if it +/// only has one predecessor, and that predecessor only has one successor. +/// If a Pass is given, the LoopInfo and DominatorTree analyses will be kept +/// current. Returns the combined block, or null if no merging was performed. +BasicBlock *MergeBlockIntoPredecessor(BasicBlock* BB, Pass* P = 0); // ReplaceInstWithValue - Replace all uses of an instruction (specified by BI) // with a value, then remove and delete the original instruction. |