Enum OptLevel 

pub enum OptLevel {
    O0,
    O1,
    O2,
    O3,
}

Optimization level, following standard compiler conventions.

Controls the LLVM mid-end optimization pipeline invoked during code generation. At -O0 no LLVM passes are run; at -O1+ the full default<OX> pipeline runs (InstCombine, GVN, SCCP, ADCE, SimplifyCFG, …).

Variants

O0

No optimization (-O0).

Produces unoptimized code that closely matches the source structure. Useful for debugging and faster compilation.

O1

Basic optimizations (-O1).

Runs LLVM’s default<O1> pipeline.

O2

Standard optimizations (-O2).

Runs LLVM’s default<O2> pipeline.

O3

Aggressive optimizations (-O3).

Runs LLVM’s default<O3> pipeline.

Implementations

impl OptLevel

pub fn name(&self) -> &'static str

Returns the name of this optimization level (e.g., “O0”, “O1”).

pub fn all() -> &'static [OptLevel]

Returns all available optimization levels.

pub fn all_names() -> &'static str

Returns a comma-separated string of all level names (for help text).

Trait Implementations

impl Clone for OptLevel

fn clone(&self) -> OptLevel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptLevel

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

Formats the value using the given formatter.

impl Default for OptLevel

fn default() -> OptLevel

Returns the “default value” for a type.

impl Display for OptLevel

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

Formats the value using the given formatter.

impl FromStr for OptLevel

type Err = ParseOptLevelError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq for OptLevel

fn eq(&self, other: &OptLevel) -> 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 Copy for OptLevel

impl Eq for OptLevel

impl StructuralPartialEq for OptLevel