Struct PhiNode 

pub struct PhiNode {
    pub var: LcnfVarId,
    pub operands: Vec<PhiOperand>,
    pub vn: ValueNumber,
}

A phi-node synthesized at a case join point.

In SSA, every join point needs a phi-node for variables with different values in different branches. In GVN, phi-nodes get value numbers too.

Fields

var: LcnfVarId

The variable introduced by this phi.

operands: Vec<PhiOperand>

The operands from each incoming branch.

vn: ValueNumber

The value number assigned to this phi-node.

Implementations

impl PhiNode

pub fn new(var: LcnfVarId, operands: Vec<PhiOperand>, vn: ValueNumber) -> Self

pub fn is_trivial(&self) -> bool

Return true if all operands have the same value number (trivial phi).

pub fn trivial_vn(&self) -> Option<ValueNumber>

If trivial, return the single unique value number.

Trait Implementations

impl Clone for PhiNode

fn clone(&self) -> PhiNode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PhiNode

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

Formats the value using the given formatter.