llvm::detachDeadBlocks

Replace every block in BBs with a single unreachable instruction.

Synopsis

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

void
detachDeadBlocks(
    ArrayRef<BasicBlock*> BBs,
    SmallVectorImpl<DominatorTree::UpdateType>* Updates,
    bool KeepOneInputPHIs = false);

Description

If Updates is specified, collect all necessary DT updates into this vector. If KeepOneInputPHIs is true, one‐input Phis in successors of blocks being deleted will be preserved.

Parameters

Name

Description

BBs

Blocks whose contents are replaced with unreachable.

Updates

Optional vector that receives dominator‐tree updates.

KeepOneInputPHIs

Whether to preserve one‐input PHIs in successors.

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