llvm::SplitBlockPredecessors

Synopses

Declared in <llvm/Transforms/Utils/BasicBlockUtils.h>

Redirect selected predecessors of a block through a new intermediate block.

BasicBlock*
SplitBlockPredecessors(
    BasicBlock* BB,
    ArrayRef<BasicBlock*> Preds,
    char const* Suffix,
    DomTreeUpdater* DTU = nullptr,
    LoopInfo* LI = nullptr,
    MemorySSAUpdater* MSSAU = nullptr,
    bool PreserveLCSSA = false);

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Redirect selected predecessors of a block through a new intermediate block.

BasicBlock*
SplitBlockPredecessors(
    BasicBlock* BB,
    ArrayRef<BasicBlock*> Preds,
    char const* Suffix,
    DominatorTree* DT,
    LoopInfo* LI = nullptr,
    MemorySSAUpdater* MSSAU = nullptr,
    bool PreserveLCSSA = false);

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Return Value

The new intermediate block to which predecessors from Preds now point.

Parameters

Name	Description
BB	Block whose predecessors are redirected.
Preds	Predecessors moved to the new intermediate block.
Suffix	Name suffix for the newly created block.
DTU	Optional dominator-tree updater for CFG changes.
LI	Optional loop info to update.
MSSAU	Optional MemorySSA updater for the split.
PreserveLCSSA	Whether to preserve LCSSA form.
DT	Dominator tree to update.