rustc_target: require TyAbiInterface in LayoutOf.

Author: eddyb

compiler/rustc_lint/src/context.rs

@@ -41,7 +41,7 @@ use rustc_session::Session;
 use rustc_session::SessionLintStore;
 use rustc_span::lev_distance::find_best_match_for_name;
 use rustc_span::{symbol::Symbol, MultiSpan, Span, DUMMY_SP};
-use rustc_target::abi::LayoutOf;
+use rustc_target::abi::{self, LayoutOf};
 use tracing::debug;
 
 use std::cell::Cell;
@@ -1059,6 +1059,27 @@ impl<'tcx> LateContext<'tcx> {
     }
 }
 
+impl<'tcx> abi::HasDataLayout for LateContext<'tcx> {
+    #[inline]
+    fn data_layout(&self) -> &abi::TargetDataLayout {
+        &self.tcx.data_layout
+    }
+}
+
+impl<'tcx> ty::layout::HasTyCtxt<'tcx> for LateContext<'tcx> {
+    #[inline]
+    fn tcx(&self) -> TyCtxt<'tcx> {
+        self.tcx
+    }
+}
+
+impl<'tcx> ty::layout::HasParamEnv<'tcx> for LateContext<'tcx> {
+    #[inline]
+    fn param_env(&self) -> ty::ParamEnv<'tcx> {
+        self.param_env
+    }
+}
+
 impl<'tcx> LayoutOf<'tcx> for LateContext<'tcx> {
     type Ty = Ty<'tcx>;
     type TyAndLayout = Result<TyAndLayout<'tcx>, LayoutError<'tcx>>;

compiler/rustc_middle/src/ty/layout.rs

@@ -2034,6 +2034,20 @@ impl<'tcx> HasTyCtxt<'tcx> for TyCtxt<'tcx> {
     }
 }
 
+impl<'tcx> HasDataLayout for ty::query::TyCtxtAt<'tcx> {
+    #[inline]
+    fn data_layout(&self) -> &TargetDataLayout {
+        &self.data_layout
+    }
+}
+
+impl<'tcx> HasTyCtxt<'tcx> for ty::query::TyCtxtAt<'tcx> {
+    #[inline]
+    fn tcx(&self) -> TyCtxt<'tcx> {
+        **self
+    }
+}
+
 impl<'tcx, C> HasParamEnv<'tcx> for LayoutCx<'tcx, C> {
     fn param_env(&self) -> ty::ParamEnv<'tcx> {
         self.param_env

compiler/rustc_mir/src/transform/const_prop.rs

@@ -17,7 +17,7 @@ use rustc_middle::mir::{
     Location, Operand, Place, Rvalue, SourceInfo, SourceScope, SourceScopeData, Statement,
     StatementKind, Terminator, TerminatorKind, UnOp, RETURN_PLACE,
 };
-use rustc_middle::ty::layout::{HasTyCtxt, LayoutError, TyAndLayout};
+use rustc_middle::ty::layout::{LayoutError, TyAndLayout};
 use rustc_middle::ty::subst::{InternalSubsts, Subst};
 use rustc_middle::ty::{
     self, ConstInt, ConstKind, Instance, ParamEnv, ScalarInt, Ty, TyCtxt, TypeFoldable,
@@ -346,13 +346,20 @@ impl<'mir, 'tcx> HasDataLayout for ConstPropagator<'mir, 'tcx> {
     }
 }
 
-impl<'mir, 'tcx> HasTyCtxt<'tcx> for ConstPropagator<'mir, 'tcx> {
+impl<'mir, 'tcx> ty::layout::HasTyCtxt<'tcx> for ConstPropagator<'mir, 'tcx> {
     #[inline]
     fn tcx(&self) -> TyCtxt<'tcx> {
         self.tcx
     }
 }
 
+impl<'mir, 'tcx> ty::layout::HasParamEnv<'tcx> for ConstPropagator<'mir, 'tcx> {
+    #[inline]
+    fn param_env(&self) -> ty::ParamEnv<'tcx> {
+        self.param_env
+    }
+}
+
 impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
     fn new(
         body: &Body<'tcx>,

compiler/rustc_target/src/abi/mod.rs

@@ -1174,8 +1174,8 @@ impl<'a, Ty> Deref for TyAndLayout<'a, Ty> {
 }
 
 /// Trait for context types that can compute layouts of things.
-pub trait LayoutOf<'a> {
-    type Ty;
+pub trait LayoutOf<'a>: Sized {
+    type Ty: TyAbiInterface<'a, Self>;
     type TyAndLayout: MaybeResult<TyAndLayout<'a, Self::Ty>>;
 
     fn layout_of(&self, ty: Self::Ty) -> Self::TyAndLayout;