New upstream version 1.65.0+dfsg1

[rustc.git] / compiler / rustc_const_eval / src / const_eval / valtrees.rs

diff --git a/compiler/rustc_const_eval/src/const_eval/valtrees.rs b/compiler/rustc_const_eval/src/const_eval/valtrees.rs
index 8fff4571d127c4ac263f7856e50b6a28051eb990..a964fe8465eeceefb96a68077e1297f34b577195 100644 (file)
--- a/compiler/rustc_const_eval/src/const_eval/valtrees.rs
+++ b/compiler/rustc_const_eval/src/const_eval/valtrees.rs
@@ -3,7 +3,7 @@ use super::machine::CompileTimeEvalContext;
 use super::{ValTreeCreationError, ValTreeCreationResult, VALTREE_MAX_NODES};
 use crate::interpret::{
     intern_const_alloc_recursive, ConstValue, ImmTy, Immediate, InternKind, MemPlaceMeta,
-    MemoryKind, PlaceTy, Scalar, ScalarMaybeUninit,
+    MemoryKind, PlaceTy, Scalar,
 };
 use crate::interpret::{MPlaceTy, Value};
 use rustc_middle::ty::{self, ScalarInt, Ty, TyCtxt};
@@ -90,14 +90,14 @@ pub(crate) fn const_to_valtree_inner<'tcx>(
             let Ok(val) = ecx.read_immediate(&place.into()) else {
                 return Err(ValTreeCreationError::Other);
             };
-            let val = val.to_scalar().unwrap();
+            let val = val.to_scalar();
             *num_nodes += 1;
 
             Ok(ty::ValTree::Leaf(val.assert_int()))
         }
 
         // Raw pointers are not allowed in type level constants, as we cannot properly test them for
-        // equality at compile-time (see `ptr_guaranteed_eq`/`_ne`).
+        // equality at compile-time (see `ptr_guaranteed_cmp`).
         // Technically we could allow function pointers (represented as `ty::Instance`), but this is not guaranteed to
         // agree with runtime equality tests.
         ty::FnPtr(_) | ty::RawPtr(_) => Err(ValTreeCreationError::NonSupportedType),
@@ -204,7 +204,7 @@ fn get_info_on_unsized_field<'tcx>(
     (unsized_inner_ty, num_elems)
 }
 
-#[instrument(skip(ecx), level = "debug")]
+#[instrument(skip(ecx), level = "debug", ret)]
 fn create_pointee_place<'tcx>(
     ecx: &mut CompileTimeEvalContext<'tcx, 'tcx>,
     ty: Ty<'tcx>,
@@ -237,14 +237,11 @@ fn create_pointee_place<'tcx>(
         let ptr = ecx.allocate_ptr(size, align, MemoryKind::Stack).unwrap();
         debug!(?ptr);
 
-        let place = MPlaceTy::from_aligned_ptr_with_meta(
+        MPlaceTy::from_aligned_ptr_with_meta(
             ptr.into(),
             layout,
             MemPlaceMeta::Meta(Scalar::from_machine_usize(num_elems as u64, &tcx)),
-        );
-        debug!(?place);
-
-        place
+        )
     } else {
         create_mplace_from_layout(ecx, ty)
     }
@@ -253,7 +250,7 @@ fn create_pointee_place<'tcx>(
 /// Converts a `ValTree` to a `ConstValue`, which is needed after mir
 /// construction has finished.
 // FIXME Merge `valtree_to_const_value` and `valtree_into_mplace` into one function
-#[instrument(skip(tcx), level = "debug")]
+#[instrument(skip(tcx), level = "debug", ret)]
 pub fn valtree_to_const_value<'tcx>(
     tcx: TyCtxt<'tcx>,
     param_env_ty: ty::ParamEnvAnd<'tcx, Ty<'tcx>>,
@@ -294,7 +291,7 @@ pub fn valtree_to_const_value<'tcx>(
             dump_place(&ecx, place.into());
             intern_const_alloc_recursive(&mut ecx, InternKind::Constant, &place).unwrap();
 
-            let const_val = match ty.kind() {
+            match ty.kind() {
                 ty::Ref(_, _, _) => {
                     let ref_place = place.to_ref(&tcx);
                     let imm =
@@ -303,10 +300,7 @@ pub fn valtree_to_const_value<'tcx>(
                     op_to_const(&ecx, &imm.into())
                 }
                 _ => op_to_const(&ecx, &place.into()),
-            };
-            debug!(?const_val);
-
-            const_val
+            }
         }
         ty::Never
         | ty::Error(_)
@@ -349,11 +343,7 @@ fn valtree_into_mplace<'tcx>(
         ty::Bool | ty::Int(_) | ty::Uint(_) | ty::Float(_) | ty::Char => {
             let scalar_int = valtree.unwrap_leaf();
             debug!("writing trivial valtree {:?} to place {:?}", scalar_int, place);
-            ecx.write_immediate(
-                Immediate::Scalar(ScalarMaybeUninit::Scalar(scalar_int.into())),
-                &place.into(),
-            )
-            .unwrap();
+            ecx.write_immediate(Immediate::Scalar(scalar_int.into()), &place.into()).unwrap();
         }
         ty::Ref(_, inner_ty, _) => {
             let mut pointee_place = create_pointee_place(ecx, *inner_ty, valtree);
@@ -366,11 +356,10 @@ fn valtree_into_mplace<'tcx>(
             let imm = match inner_ty.kind() {
                 ty::Slice(_) | ty::Str => {
                     let len = valtree.unwrap_branch().len();
-                    let len_scalar =
-                        ScalarMaybeUninit::Scalar(Scalar::from_machine_usize(len as u64, &tcx));
+                    let len_scalar = Scalar::from_machine_usize(len as u64, &tcx);
 
                     Immediate::ScalarPair(
-                        ScalarMaybeUninit::from_maybe_pointer((*pointee_place).ptr, &tcx),
+                        Scalar::from_maybe_pointer((*pointee_place).ptr, &tcx),
                         len_scalar,
                     )
                 }