Struct Reg 

pub struct Reg(/* private fields */);

A register operand: physical or virtual.

Before register allocation, instructions name virtual registers (and the physical registers an ABI or an instruction fixes); after it, only physical ones. Emission requires the latter.

Examples

use backend_lang::Reg;
use backend_lang::x86_64::RAX;

let r = Reg::from(RAX);
assert_eq!(r.as_phys(), Some(RAX));
assert!(r.as_virt().is_none());

Implementations

impl Reg

pub const fn as_phys(self) -> Option<PReg>

The register as a physical register, if it is one.

Examples

use backend_lang::Reg;
use backend_lang::x86_64::RSI;

assert_eq!(Reg::from(RSI).as_phys(), Some(RSI));

pub const fn as_virt(self) -> Option<VReg>

The register as a virtual register, if it is one.

Examples

use backend_lang::mir::Function;
use backend_lang::x86_64::{GPR, SYSV};

let mut f = Function::new("f", &SYSV);
let r = f.vreg(GPR).unwrap();
assert!(r.as_virt().is_some());
assert!(r.as_phys().is_none());

pub const fn is_virtual(self) -> bool

Whether this is a virtual register.

Examples

use backend_lang::Reg;
use backend_lang::x86_64::RAX;

assert!(!Reg::from(RAX).is_virtual());

Trait Implementations

impl Clone for Reg

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Reg

impl Debug for Reg

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

Formats the value using the given formatter.

impl Eq for Reg

impl From<PReg> for Reg

fn from(p: PReg) -> Reg

Converts to this type from the input type.

impl From<Reg> for Operand

fn from(r: Reg) -> Operand

Converts to this type from the input type.

impl From<VReg> for Reg

fn from(v: VReg) -> Reg

Converts to this type from the input type.

impl Hash for Reg

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 Ord for Reg

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

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

Restrict a value to a certain range.

impl PartialEq for Reg

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Reg

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Reg