Enum ValueDef

pub enum ValueDef {
    BlockParam(Block, u32, Type),
    Operator(Operator, ListRef<Value>, ListRef<Type>),
    PickOutput(Value, u32, Type),
    Alias(Value),
    Placeholder(Type),
    None,
}

A definition of an SSA value.

Variants

BlockParam(Block, u32, Type)

This value is a block parameter of the given block, with the given parameter position/index, and the given type.

Operator(Operator, ListRef<Value>, ListRef<Type>)

This value is an operator, taking the given arguments, and producing the given result types.

The result of an operator may be a single Type or a tuple of types; in the latter case, valid IR must use PickOutput to project out individual elements and use them.

PickOutput(Value, u32, Type)

This value projects out one result of a multi-result instruction: given the value, the index in the result tuple, it produces a value of the given type.

Alias(Value)

This value is an alias of another value.

Placeholder(Type)

This value is a placeholder to be filled in later (e.g., during SSA construction, may become a blockparam or an alias). Placeholders have fixed types that cannot change once they are filled in.

None

No value: must be filled in before processing.

Implementations

impl ValueDef

pub fn ty(&self, types: &ListPool<Type>) -> Option<Type>

Get the type of this value. Requires the type-pool. If this value is an operator with zero or multiple result types, this returns None.

pub fn tys<'a>(&'a self, types: &'a ListPool<Type>) -> &'a [Type]

Get the tuple of types of this value.

pub fn visit_uses<F: FnMut(Value)>(&self, arg_pool: &ListPool<Value>, f: F)

Visit all other values used by this value with the given visitor function.

pub fn update_uses<F: FnMut(&mut Value)>( &mut self, arg_pool: &mut ListPool<Value>, f: F, )

Visit and update all other values used by this value with the given visitor function.

Trait Implementations

impl Clone for ValueDef

fn clone(&self) -> ValueDef

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ValueDef

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

Formats the value using the given formatter.

impl Default for ValueDef

fn default() -> ValueDef

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ValueDef

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ValueDef

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ValueDef

fn eq(&self, other: &ValueDef) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ValueDef

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ValueDef

impl StructuralPartialEq for ValueDef