Function module_for

cranelift/object/tests/basic.rs:326–336

Build an `ObjectModule` for `triple` with the unwind-info builder flag set to `unwind_info`. Frame pointers are forced on so cranelift emits a non-trivial prologue (and therefore unwind info) for every function.

(triple: &str, unwind_info: bool)

    /// set to `unwind_info`. Frame pointers are forced on so cranelift emits
    /// a non-trivial prologue (and therefore unwind info) for every function.
    fn module_for(triple: &str, unwind_info: bool) -> ObjectModule {
        let mut flag_builder = settings::builder();
        flag_builder.set("preserve_frame_pointers", "true").unwrap();
        let isa = cranelift_codegen::isa::lookup_by_name(triple)
            .unwrap()
            .finish(settings::Flags::new(flag_builder))
            .unwrap();
        let mut builder = ObjectBuilder::new(isa, "test", default_libcall_names()).unwrap();
        builder.unwind_info(unwind_info);
        ObjectModule::new(builder)
    }

    /// Define a leaf function that just returns. With `preserve_frame_pointers`
    /// on, this is enough to make cranelift emit a System V FDE for it.