Function create_entities

cranelift/codegen/src/inline.rs:1367–1391

Translate all of the callee's various entities into the caller, producing an `EntityMap` that can be used to translate callee entity references into inlined caller entity references.

(
    allocs: &mut InliningAllocs,
    func: &mut ir::Function,
    callee: &ir::Function,
)

/// `EntityMap` that can be used to translate callee entity references into
/// inlined caller entity references.
fn create_entities(
    allocs: &mut InliningAllocs,
    func: &mut ir::Function,
    callee: &ir::Function,
) -> CodegenResult<EntityMap> {
    let mut entity_map = EntityMap::default();

    entity_map.block_offset = Some(create_blocks(allocs, func, callee));
    entity_map.global_value_offset = Some(create_global_values(func, callee)?);
    entity_map.sig_ref_offset = Some(create_sig_refs(func, callee));
    create_user_external_name_refs(allocs, func, callee);
    entity_map.func_ref_offset = Some(create_func_refs(allocs, func, callee, &entity_map));
    entity_map.stack_slot_offset = Some(create_stack_slots(func, callee));
    entity_map.dynamic_type_offset = Some(create_dynamic_types(func, callee, &entity_map));
    entity_map.dynamic_stack_slot_offset =
        Some(create_dynamic_stack_slots(func, callee, &entity_map));
    entity_map.immediate_offset = Some(create_immediates(func, callee));

    // `ir::ConstantData` is deduplicated, so we cannot use our offset scheme
    // for `ir::Constant`s. Nonetheless, we still insert them into the caller
    // now, at the same time as the rest of our entities.
    create_constants(allocs, func, callee);

    Ok(entity_map)
}

/// Create inlined blocks in the caller for every block in the callee.
fn create_blocks(