Enum CallConv

pub enum CallConv {
    Fast,
    Cold,
    Tail,
    SystemV,
    WindowsFastcall,
    AppleAarch64,
    Probestack,
    WasmtimeSystemV,
    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.

WasmtimeSystemV

Wasmtime equivalent of SystemV, not ABI-stable.

FIXME: remove this when Wasmtime uses the “tail” calling convention for all wasm functions.

Winch

The winch calling convention, not ABI-stable.

The main difference to WasmtimeSystemV 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) -> Self

Return the default calling convention for the given target triple.

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

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?

pub fn extends_windows_fastcall(self) -> bool

Is the calling convention extending the Windows Fastcall ABI?

pub fn extends_apple_aarch64(self) -> bool

Is the calling convention extending the Apple aarch64 ABI?

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

Formats the value using the given formatter.

impl Display for CallConv

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

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<Self, Self::Err>

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

impl Hash for CallConv

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 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 Copy for CallConv

impl Eq for CallConv

impl StructuralPartialEq for CallConv