Auto merge of rust-lang#71759 - Dylan-DPC:rollup-5hncork, r=Dylan-DPC

Rollup of 5 pull requests

Successful merges:

 - rust-lang#71744 (remove obsolete comment)
 - rust-lang#71747 (Remove deadcode in eval_mir_constant_to_operand)
 - rust-lang#71749 (fix Miri error message padding)
 - rust-lang#71752 (make Stability doc a more readable (and fix rustdoc warning))
 - rust-lang#71755 (fix doc reference)

Failed merges:

r? @ghost

Author: bors

src/librustc_attr/builtin.rs

@@ -119,7 +119,11 @@ pub fn find_unwind_attr(diagnostic: Option<&Handler>, attrs: &[Attribute]) -> Op
     })
 }
 
-/// Represents the #[stable], #[unstable], #[rustc_deprecated] attributes.
+/// Represents the following attributes:
+///
+/// - `#[stable]`
+/// - `#[unstable]`
+/// - `#[rustc_deprecated]`
 #[derive(RustcEncodable, RustcDecodable, Copy, Clone, Debug, PartialEq, Eq, Hash)]
 #[derive(HashStable_Generic)]
 pub struct Stability {
@@ -128,7 +132,7 @@ pub struct Stability {
     pub rustc_depr: Option<RustcDeprecation>,
 }
 
-/// Represents the #[rustc_const_unstable] and #[rustc_const_stable] attributes.
+/// Represents the `#[rustc_const_unstable]` and `#[rustc_const_stable]` attributes.
 #[derive(RustcEncodable, RustcDecodable, Copy, Clone, Debug, PartialEq, Eq, Hash)]
 #[derive(HashStable_Generic)]
 pub struct ConstStability {

src/librustc_codegen_ssa/mir/constant.rs

@@ -16,25 +16,9 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         bx: &mut Bx,
         constant: &mir::Constant<'tcx>,
     ) -> Result<OperandRef<'tcx, Bx::Value>, ErrorHandled> {
-        match constant.literal.val {
-            // Special case unevaluated statics, because statics have an identity and thus should
-            // use `get_static` to get at their id.
-            // FIXME(oli-obk): can we unify this somehow, maybe by making const eval of statics
-            // always produce `&STATIC`. This may also simplify how const eval works with statics.
-            ty::ConstKind::Unevaluated(def_id, substs, None) if self.cx.tcx().is_static(def_id) => {
-                assert!(substs.is_empty(), "we don't support generic statics yet");
-                let static_ = bx.get_static(def_id);
-                // we treat operands referring to statics as if they were `&STATIC` instead
-                let ptr_ty = self.cx.tcx().mk_mut_ptr(self.monomorphize(&constant.literal.ty));
-                let layout = bx.layout_of(ptr_ty);
-                Ok(OperandRef::from_immediate_or_packed_pair(bx, static_, layout))
-            }
-            _ => {
-                let val = self.eval_mir_constant(constant)?;
-                let ty = self.monomorphize(&constant.literal.ty);
-                Ok(OperandRef::from_const(bx, val, ty))
-            }
-        }
+        let val = self.eval_mir_constant(constant)?;
+        let ty = self.monomorphize(&constant.literal.ty);
+        Ok(OperandRef::from_const(bx, val, ty))
     }
 
     pub fn eval_mir_constant(

src/librustc_hir/hir.rs

@@ -2050,7 +2050,7 @@ pub struct Param<'hir> {
 pub struct FnDecl<'hir> {
     /// The types of the function's parameters.
     ///
-    /// Additional argument data is stored in the function's [body](Body::parameters).
+    /// Additional argument data is stored in the function's [body](Body::params).
     pub inputs: &'hir [Ty<'hir>],
     pub output: FnRetTy<'hir>,
     pub c_variadic: bool,

src/librustc_infer/infer/region_constraints/mod.rs

@@ -147,11 +147,6 @@ impl Constraint<'_> {
     }
 }
 
-/// `VerifyGenericBound(T, _, R, RS)`: the parameter type `T` (or
-/// associated type) must outlive the region `R`. `T` is known to
-/// outlive `RS`. Therefore, verify that `R <= RS[i]` for some
-/// `i`. Inference variables may be involved (but this verification
-/// step doesn't influence inference).
 #[derive(Debug, Clone)]
 pub struct Verify<'tcx> {
     pub kind: GenericKind<'tcx>,
@@ -687,7 +682,6 @@ impl<'tcx> RegionConstraintCollector<'tcx> {
         }
     }
 
-    /// See [`Verify::VerifyGenericBound`].
     pub fn verify_generic_bound(
         &mut self,
         origin: SubregionOrigin<'tcx>,

src/librustc_middle/mir/interpret/error.rs

@@ -439,10 +439,10 @@ impl fmt::Display for UndefinedBehaviorInfo {
             DerefFunctionPointer(a) => write!(f, "accessing {} which contains a function", a),
             ValidationFailure(ref err) => write!(f, "type validation failed: {}", err),
             InvalidBool(b) => {
-                write!(f, "interpreting an invalid 8-bit value as a bool: 0x{:2x}", b)
+                write!(f, "interpreting an invalid 8-bit value as a bool: 0x{:02x}", b)
             }
             InvalidChar(c) => {
-                write!(f, "interpreting an invalid 32-bit value as a char: 0x{:8x}", c)
+                write!(f, "interpreting an invalid 32-bit value as a char: 0x{:08x}", c)
             }
             InvalidDiscriminant(val) => write!(f, "enum value has invalid discriminant: {}", val),
             InvalidFunctionPointer(p) => {