Enum cranelift_codegen::ir::GlobalValueData

pub enum GlobalValueData {
    VMContext {
        offset: Offset32,
    },
    Deref {
        base: GlobalValue,
        offset: Offset32,
    },
    Sym {
        name: ExternalName,
        colocated: bool,
    },
}

Information about a global value declaration.

Variants

VMContext

Value is the address of a field in the VM context struct, a constant offset from the VM context pointer.

Fields of VMContext

offset: Offset32

Offset from the vmctx pointer.

Deref

Value is pointed to by another global value.

The base global value is assumed to contain a pointer. This global value is computed by loading from memory at that pointer value, and then adding an offset. The memory must be accessible, and naturally aligned to hold a pointer value.

Fields of Deref

base: GlobalValue	The base pointer global value.
offset: Offset32	Byte offset to be added to the loaded value.

Sym

Value is identified by a symbolic name. Cranelift itself does not interpret this name; it's used by embedders to link with other data structures.

Fields of Sym

name: ExternalName	The symbolic name.
colocated: bool	Will this symbol be defined nearby, such that it will always be a certain distance away, after linking? If so, references to it can avoid going through a GOT. Note that symbols meant to be preemptible cannot be colocated.

Methods

impl GlobalValueData

pub fn symbol_name(&self) -> &ExternalName

Assume that self is an GlobalValueData::Sym and return its name.

Trait Implementations

impl Clone for GlobalValueData

fn clone(&self) -> GlobalValueData

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Display for GlobalValueData

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

Formats the value using the given formatter.