sig
type t =
NullValue
| Argument
| BasicBlock
| InlineAsm
| MDNode
| MDString
| BlockAddress
| ConstantAggregateZero
| ConstantArray
| ConstantDataArray
| ConstantDataVector
| ConstantExpr
| ConstantFP
| ConstantInt
| ConstantPointerNull
| ConstantStruct
| ConstantVector
| Function
| GlobalAlias
| GlobalVariable
| UndefValue
| Instruction of Llvm.Opcode.t
end