Function alias_map

cranelift/codegen/src/write.rs:163–172

Create a reverse-alias map from a value to all aliases having that value as a direct target

(func: &Function)

/// Create a reverse-alias map from a value to all aliases having that value as a direct target
fn alias_map(func: &Function) -> SecondaryMap<Value, Vec<Value>> {
    let mut aliases = SecondaryMap::<_, Vec<_>>::new();
    for v in func.dfg.values() {
        // VADFS returns the immediate target of an alias
        if let Some(k) = func.dfg.value_alias_dest_for_serialization(v) {
            aliases[k].push(v);
        }
    }
    aliases
}

/// Writes `func` to `w` as text.
/// write_function_plain is passed as 'closure' to print instructions as text.