¶bool DeleteDeadPHIs(
    llvm::BasicBlock* BB,
    const llvm::TargetLibraryInfo* TLI = nullptr,
    llvm::MemorySSAUpdater* MSSAU = nullptr)

Description

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. Return true if any PHIs were deleted.

Declared at: llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h:83

Parameters

llvm::BasicBlock* BB

const llvm::TargetLibraryInfo* TLI = nullptr

llvm::MemorySSAUpdater* MSSAU = nullptr