diff options
Diffstat (limited to 'include/llvm/Transforms')
| -rw-r--r-- | include/llvm/Transforms/Utils/BasicBlockUtils.h | 5 | ||||
| -rw-r--r-- | include/llvm/Transforms/Utils/Local.h | 9 |
2 files changed, 8 insertions, 6 deletions
diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h index f1a99978ab..3f4571ebdd 100644 --- a/include/llvm/Transforms/Utils/BasicBlockUtils.h +++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h @@ -40,8 +40,9 @@ void FoldSingleEntryPHINodes(BasicBlock *BB); /// DeleteDeadPHIs - Examine each PHI in the given block and delete it if it /// is dead. Also recursively delete any operands that become dead as /// a result. This includes tracing the def-use list from the PHI to see if -/// it is ultimately unused or if it reaches an unused cycle. -void DeleteDeadPHIs(BasicBlock *BB); +/// it is ultimately unused or if it reaches an unused cycle. Return true +/// if any PHIs were deleted. +bool DeleteDeadPHIs(BasicBlock *BB); /// MergeBlockIntoPredecessor - Attempts to merge a block into its predecessor, /// if possible. The return value indicates success or failure. diff --git a/include/llvm/Transforms/Utils/Local.h b/include/llvm/Transforms/Utils/Local.h index 5f23d88c6f..103d4cda41 100644 --- a/include/llvm/Transforms/Utils/Local.h +++ b/include/llvm/Transforms/Utils/Local.h @@ -63,15 +63,16 @@ bool isInstructionTriviallyDead(Instruction *I); /// RecursivelyDeleteTriviallyDeadInstructions - If the specified value is a /// trivially dead instruction, delete it. If that makes any of its operands -/// trivially dead, delete them too, recursively. -void RecursivelyDeleteTriviallyDeadInstructions(Value *V); +/// trivially dead, delete them too, recursively. Return true if any +/// instructions were deleted. +bool RecursivelyDeleteTriviallyDeadInstructions(Value *V); /// RecursivelyDeleteDeadPHINode - If the specified value is an effectively /// dead PHI node, due to being a def-use chain of single-use nodes that /// either forms a cycle or is terminated by a trivially dead instruction, /// delete it. If that makes any of its operands trivially dead, delete them -/// too, recursively. -void RecursivelyDeleteDeadPHINode(PHINode *PN); +/// too, recursively. Return true if the PHI node is actually deleted. +bool RecursivelyDeleteDeadPHINode(PHINode *PN); //===----------------------------------------------------------------------===// // Control Flow Graph Restructuring. |