diff options
Diffstat (limited to 'include/llvm/Transforms/Utils/BasicBlockUtils.h')
| -rw-r--r-- | include/llvm/Transforms/Utils/BasicBlockUtils.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h index 53452eb1cd..78e5592f44 100644 --- a/include/llvm/Transforms/Utils/BasicBlockUtils.h +++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h @@ -19,6 +19,7 @@ #include "llvm/BasicBlock.h" class Instruction; +class Pass; // ReplaceInstWithValue - Replace all uses of an instruction (specified by BI) // with a value, then remove and delete the original instruction. @@ -48,4 +49,19 @@ void ReplaceInstWithInst(Instruction *From, Instruction *To); // void RemoveSuccessor(TerminatorInst *TI, unsigned SuccNum); + +/// isCriticalEdge - Return true if the specified edge is a critical edge. +/// Critical edges are edges from a block with multiple successors to a block +/// with multiple predecessors. +/// +bool isCriticalEdge(const TerminatorInst *TI, unsigned SuccNum); + +/// SplitCriticalEdge - If this edge is a critical edge, insert a new node to +/// split the critical edge. This will update DominatorSet, ImmediateDominator, +/// DominatorTree, and DominatorFrontier information if it is available, thus +/// calling this pass will not invalidate either of them. This returns true if +/// the edge was split, false otherwise. +/// +bool SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P = 0); + #endif |