Enum cranelift_codegen::isa::ConstraintKind[−][src]

pub enum ConstraintKind {
    Reg,
    FixedReg(RegUnit),
    Tied(u8),
    FixedTied(RegUnit),
    Stack,
}
Expand description

The different kinds of operand constraints.

Variants

Reg

This operand or result must be a register from the given register class.

FixedReg(RegUnit)

This operand or result must be a fixed register.

The constraint’s regclass field is the top-level register class containing the fixed register.

Tied(u8)

This result value must use the same register as an input value operand.

The associated number is the index of the input value operand this result is tied to. The constraint’s regclass field is the same as the tied operand’s register class.

When an (in, out) operand pair is tied, this constraint kind appears in both the ins and the outs arrays. The constraint for the in operand is Tied(out), and the constraint for the out operand is Tied(in).

FixedTied(RegUnit)

This operand must be a fixed register, and it has a tied counterpart.

This works just like FixedReg, but additionally indicates that there are identical input/output operands for this fixed register. For an input operand, this means that the value will be clobbered by the instruction

Stack

This operand must be a value in a stack slot.

The constraint’s regclass field is the register class that would normally be used to load and store values of this type.

Trait Implementations

impl Clone for ConstraintKind[src]

fn clone(&self) -> ConstraintKind[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for ConstraintKind[src]

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

Formats the value using the given formatter. Read more

impl PartialEq<ConstraintKind> for ConstraintKind[src]

fn eq(&self, other: &ConstraintKind) -> bool[src]

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &ConstraintKind) -> bool[src]

This method tests for !=.

impl Copy for ConstraintKind[src]

impl Eq for ConstraintKind[src]

impl StructuralEq for ConstraintKind[src]

impl StructuralPartialEq for ConstraintKind[src]

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<Q, K> Equivalent<K> for Q where
    K: Borrow<Q> + ?Sized,
    Q: Eq + ?Sized, [src]

pub fn equivalent(&self, key: &K) -> bool[src]

Compare self to key and return true if they are equal.

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.