Function LLVMSetParentCatchSwitch 

pub unsafe extern "C" fn LLVMSetParentCatchSwitch(
    CatchPad: LLVMValueRef,
    CatchSwitch: LLVMValueRef,
)

Set the parent catchswitch instruction of a catchpad instruction.

This only works on llvm::CatchPadInst instructions.

@see llvm::CatchPadInst::setCatchSwitch()