llvm::SplitBlockAndInsertIfElse

Synopses

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

Split a block and insert a conditional else-branch around the split point.

Instruction*
SplitBlockAndInsertIfElse(
    Value* Cond,
    BasicBlock::iterator SplitBefore,
    bool Unreachable,
    MDNode* BranchWeights = nullptr,
    DomTreeUpdater* DTU = nullptr,
    LoopInfo* LI = nullptr,
    BasicBlock* ElseBlock = nullptr);

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Split a block and insert an else-branch at an instruction.

Instruction*
SplitBlockAndInsertIfElse(
    Value* Cond,
    Instruction* SplitBefore,
    bool Unreachable,
    MDNode* BranchWeights = nullptr,
    DomTreeUpdater* DTU = nullptr,
    LoopInfo* LI = nullptr,
    BasicBlock* ElseBlock = nullptr);

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Return Value

The terminator of the else-block.

Parameters

Name	Description
Cond	Condition controlling the inserted branch.
SplitBefore	Instruction at which the block is split.
Unreachable	Whether the else-block ends with unreachable.
BranchWeights	Optional branch-weight metadata for the new branch.
DTU	Optional dominator-tree updater for CFG changes.
LI	Optional loop info to update.
ElseBlock	Optional existing block to use as the else-block.