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Add more APIs and fix Instance::body

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Add more APIs to retrieve information about types, and add more instance
resolution options.

Make `Instance::body()` return an Option<Body>, since not every instance
might have an available body. For example, foreign instances, virtual
instances, dependencies.
This commit is contained in:
Celina G. Val
2023-11-16 12:01:10 -08:00
parent 3f87dac9a2
commit 6515ac9d3f
9 changed files with 422 additions and 47 deletions
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41
compiler/stable_mir/src/lib.rs
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@@ -36,6 +36,7 @@ pub mod mir;
pub mod ty;
pub mod visitor;
use crate::ty::{AdtDef, AdtKind, ClosureDef, ClosureKind};
pub use error::*;
use mir::mono::Instance;
use ty::{FnDef, GenericArgs};
@@ -99,7 +100,13 @@ pub struct Crate {
pub is_local: bool,
}
pub type DefKind = Opaque;
#[derive(Copy, Clone, PartialEq, Eq, Debug, Hash)]
pub enum ItemKind {
Fn,
Static,
Const,
}
pub type Filename = Opaque;
/// Holds information about an item in the crate.
@@ -119,13 +126,17 @@ impl CrateItem {
with(|cx| cx.name_of_def_id(self.0))
}
pub fn kind(&self) -> DefKind {
with(|cx| cx.def_kind(self.0))
pub fn kind(&self) -> ItemKind {
with(|cx| cx.item_kind(*self))
}
pub fn requires_monomorphization(&self) -> bool {
with(|cx| cx.requires_monomorphization(self.0))
}
pub fn ty(&self) -> Ty {
with(|cx| cx.def_ty(self.0))
}
}
/// Return the function where execution starts if the current
@@ -204,7 +215,13 @@ pub trait Context {
fn get_lines(&self, span: &Span) -> LineInfo;
/// Returns the `kind` of given `DefId`
fn def_kind(&self, def_id: DefId) -> DefKind;
fn item_kind(&self, item: CrateItem) -> ItemKind;
/// Returns the kind of a given algebraic data type
fn adt_kind(&self, def: AdtDef) -> AdtKind;
/// Returns the type of given crate item.
fn def_ty(&self, item: DefId) -> Ty;
/// `Span` of an item
fn span_of_an_item(&self, def_id: DefId) -> Span;
@@ -214,7 +231,7 @@ pub trait Context {
/// Get the body of an Instance.
/// FIXME: Monomorphize the body.
fn instance_body(&self, instance: InstanceDef) -> Body;
fn instance_body(&self, instance: InstanceDef) -> Option<Body>;
/// Get the instance type with generic substitutions applied and lifetimes erased.
fn instance_ty(&self, instance: InstanceDef) -> Ty;
@@ -234,6 +251,20 @@ pub trait Context {
/// Resolve an instance from the given function definition and generic arguments.
fn resolve_instance(&self, def: FnDef, args: &GenericArgs) -> Option<Instance>;
/// Resolve an instance for drop_in_place for the given type.
fn resolve_drop_in_place(&self, ty: Ty) -> Option<Instance>;
/// Resolve instance for a function pointer.
fn resolve_for_fn_ptr(&self, def: FnDef, args: &GenericArgs) -> Option<Instance>;
/// Resolve instance for a closure with the requested type.
fn resolve_closure(
&self,
def: ClosureDef,
args: &GenericArgs,
kind: ClosureKind,
) -> Option<Instance>;
}
// A thread local variable that stores a pointer to the tables mapping between TyCtxt