1 files changed, 79 insertions, 0 deletions
diff --git a/compiler/rustc_public_bridge/src/context/mod.rs b/compiler/rustc_public_bridge/src/context/mod.rs
new file mode 100644
index 00000000000..da20be2a4b3
--- /dev/null
+++ b/compiler/rustc_public_bridge/src/context/mod.rs
@@ -0,0 +1,79 @@
+//! Implementation of StableMIR Context.
+
+#![allow(rustc::usage_of_qualified_ty)]
+
+use std::marker::PhantomData;
+
+use rustc_abi::HasDataLayout;
+use rustc_middle::ty;
+use rustc_middle::ty::layout::{FnAbiOfHelpers, HasTyCtxt, HasTypingEnv, LayoutOfHelpers};
+use rustc_middle::ty::{Ty, TyCtxt};
+
+use crate::{Bridge, SmirError};
+
+mod impls;
+mod traits;
+
+pub use traits::*;
+
+/// Provides direct access to rustc's internal queries.
+///
+/// `SmirInterface` must go through
+/// this context to obtain rustc-level information.
+pub struct SmirCtxt<'tcx, B: Bridge> {
+    pub tcx: TyCtxt<'tcx>,
+    _marker: PhantomData<B>,
+}
+
+impl<'tcx, B: Bridge> SmirCtxt<'tcx, B> {
+    pub fn new(tcx: TyCtxt<'tcx>) -> Self {
+        Self { tcx, _marker: Default::default() }
+    }
+}
+
+/// Implement error handling for extracting function ABI information.
+impl<'tcx, B: Bridge> FnAbiOfHelpers<'tcx> for SmirCtxt<'tcx, B> {
+    type FnAbiOfResult = Result<&'tcx rustc_target::callconv::FnAbi<'tcx, Ty<'tcx>>, B::Error>;
+
+    #[inline]
+    fn handle_fn_abi_err(
+        &self,
+        err: ty::layout::FnAbiError<'tcx>,
+        _span: rustc_span::Span,
+        fn_abi_request: ty::layout::FnAbiRequest<'tcx>,
+    ) -> B::Error {
+        B::Error::new(format!("Failed to get ABI for `{fn_abi_request:?}`: {err:?}"))
+    }
+}
+
+impl<'tcx, B: Bridge> LayoutOfHelpers<'tcx> for SmirCtxt<'tcx, B> {
+    type LayoutOfResult = Result<ty::layout::TyAndLayout<'tcx>, B::Error>;
+
+    #[inline]
+    fn handle_layout_err(
+        &self,
+        err: ty::layout::LayoutError<'tcx>,
+        _span: rustc_span::Span,
+        ty: Ty<'tcx>,
+    ) -> B::Error {
+        B::Error::new(format!("Failed to get layout for `{ty}`: {err}"))
+    }
+}
+
+impl<'tcx, B: Bridge> HasTypingEnv<'tcx> for SmirCtxt<'tcx, B> {
+    fn typing_env(&self) -> ty::TypingEnv<'tcx> {
+        ty::TypingEnv::fully_monomorphized()
+    }
+}
+
+impl<'tcx, B: Bridge> HasTyCtxt<'tcx> for SmirCtxt<'tcx, B> {
+    fn tcx(&self) -> TyCtxt<'tcx> {
+        self.tcx
+    }
+}
+
+impl<'tcx, B: Bridge> HasDataLayout for SmirCtxt<'tcx, B> {
+    fn data_layout(&self) -> &rustc_abi::TargetDataLayout {
+        self.tcx.data_layout()
+    }
+}