diff options
Diffstat (limited to 'include/llvm/Transforms/Utils/BasicBlockUtils.h')
| -rw-r--r-- | include/llvm/Transforms/Utils/BasicBlockUtils.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h index 4d861ffe9a31..698e57fd0394 100644 --- a/include/llvm/Transforms/Utils/BasicBlockUtils.h +++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h @@ -83,10 +83,16 @@ bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = nullptr); /// Attempts to merge a block into its predecessor, if possible. The return /// value indicates success or failure. +/// By default do not merge blocks if BB's predecessor has multiple successors. +/// If PredecessorWithTwoSuccessors = true, the blocks can only be merged +/// if BB's Pred has a branch to BB and to AnotherBB, and BB has a single +/// successor Sing. In this case the branch will be updated with Sing instead of +/// BB, and BB will still be merged into its predecessor and removed. bool MergeBlockIntoPredecessor(BasicBlock *BB, DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr, MemorySSAUpdater *MSSAU = nullptr, - MemoryDependenceResults *MemDep = nullptr); + MemoryDependenceResults *MemDep = nullptr, + bool PredecessorWithTwoSuccessors = false); /// Replace all uses of an instruction (specified by BI) with a value, then /// remove and delete the original instruction. @@ -222,7 +228,8 @@ BasicBlock *SplitEdge(BasicBlock *From, BasicBlock *To, /// info is updated. BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt, DominatorTree *DT = nullptr, LoopInfo *LI = nullptr, - MemorySSAUpdater *MSSAU = nullptr); + MemorySSAUpdater *MSSAU = nullptr, + const Twine &BBName = ""); /// This method introduces at least one new basic block into the function and /// moves some of the predecessors of BB to be predecessors of the new block. |