Struct PhiInstruction 

pub struct PhiInstruction {
    pub out: Variable,
    pub entries: Vec<PhiEntry>,
}

A phi node that picks its value based on the BasicBlock that came immediately before. For more information, see https://en.wikipedia.org/wiki/Static_single-assignment_form

Example

if cond {
    result = "heads";
} else {
    result = "tails";
}

would translate to the following SSA graph:

bb1: {
    branch if cond { bb2 } else { bb3 };
}

bb2: {
    let result.v1 = "heads";
    branch bb4;
}

bb3: {
    let result.v2 = "tails";
    branch bb4;
}

bb4: {
    let result.v3 = phi [bb2: result.v1] [bb3: result.v2];
}

Fields

out: Variable

The out variable for the phi instruction

entries: Vec<PhiEntry>

The set of block-value pairs for the phi instruction

Trait Implementations

impl Clone for PhiInstruction

fn clone(&self) -> PhiInstruction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PhiInstruction

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

Formats the value using the given formatter.

impl PartialEq for PhiInstruction

fn eq(&self, other: &PhiInstruction) -> 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 StructuralPartialEq for PhiInstruction