Function rustc_llvm_proxy::proxy::LLVMBuildVAArg

#[no_mangle]
pub unsafe extern "C" fn LLVMBuildVAArg(
    arg1: LLVMBuilderRef,
    List: LLVMValueRef,
    Ty: LLVMTypeRef,
    Name: *const c_char
) -> LLVMValueRef