Enum CallConv

pub enum CallConv {
    Fast,
    Cold,
    Tail,
    SystemV,
    WindowsFastcall,
    AppleAarch64,
    Probestack,
    Winch,
}

Calling convention identifiers.

Variants

Fast

Best performance, not ABI-stable.

Cold

Smallest caller code size, not ABI-stable.

Tail

Supports tail calls, not ABI-stable.

SystemV

System V-style convention used on many platforms.

WindowsFastcall

Windows “fastcall” convention, also used for x64 and ARM.

AppleAarch64

Mac aarch64 calling convention, which is a tweaked aarch64 ABI.

Probestack

Specialized convention for the probestack function.

Winch

The winch calling convention, not ABI-stable.

The main difference to SystemV is that the winch calling convention defines no callee-save registers, and restricts the number of return registers to one integer, and one floating point.

Implementations

impl CallConv

pub fn triple_default(triple: &Triple) -> CallConv

Return the default calling convention for the given target triple.

pub fn for_libcall(flags: &Flags, default_call_conv: CallConv) -> CallConv

Returns the calling convention used for libcalls according to the current flags.

pub fn supports_tail_calls(&self) -> bool

Does this calling convention support tail calls?

Trait Implementations

impl Clone for CallConv

fn clone(&self) -> CallConv

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CallConv

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CallConv

fn deserialize<__D>( __deserializer: __D, ) -> Result<CallConv, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for CallConv

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

Formats the value using the given formatter.

impl FromStr for CallConv

type Err = ()

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<CallConv, <CallConv as FromStr>::Err>

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

impl Hash for CallConv

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

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 PartialEq for CallConv

fn eq(&self, other: &CallConv) -> 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 Serialize for CallConv

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for CallConv

impl Eq for CallConv

impl StructuralPartialEq for CallConv