Struct cranelift_frontend::Switch

pub struct Switch { /* fields omitted */ }

Unlike with br_table, Switch cases may be sparse or non-0-based. They emit efficient code using branches, jump tables, or a combination of both.

Example

let block0 = builder.create_ebb();
let block1 = builder.create_ebb();
let block2 = builder.create_ebb();
let fallback = builder.create_ebb();

let val = builder.ins().iconst(I32, 1);

let mut switch = Switch::new();
switch.set_entry(0, block0);
switch.set_entry(1, block1);
switch.set_entry(7, block2);
switch.emit(&mut builder, val, fallback);

Methods

impl Switch

pub fn new() -> Self

Create a new empty switch

pub fn set_entry(&mut self, index: u64, ebb: Ebb)

Set a switch entry

pub fn emit(self, bx: &mut FunctionBuilder, val: Value, otherwise: Ebb)

Build the switch

Arguments

• The function builder to emit to
• The value to switch on
• The default ebb

Trait Implementations

impl Debug for Switch

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for Switch

fn default() -> Switch

Returns the "default value" for a type.