Rollup merge of #61359 - GuillaumeGomez:fix-deref-doc-links, r=Manishearth

[rust.git] / src / librustc_mir / interpret / place.rs

diff --git a/src/librustc_mir/interpret/place.rs b/src/librustc_mir/interpret/place.rs
index 0cc480028161f170dac97c2741bccd8f52688faf..0ae4e90b7c24d57afb72319874960c5893f79c6e 100644 (file)
--- a/src/librustc_mir/interpret/place.rs
+++ b/src/librustc_mir/interpret/place.rs
@@ -562,15 +562,14 @@ pub fn place_projection(
 
     /// Evaluate statics and promoteds to an `MPlace`. Used to share some code between
     /// `eval_place` and `eval_place_to_op`.
-    pub(super) fn eval_place_to_mplace(
+    pub(super) fn eval_static_to_mplace(
         &self,
-        mir_place: &mir::Place<'tcx>
+        place_static: &mir::Static<'tcx>
     ) -> EvalResult<'tcx, MPlaceTy<'tcx, M::PointerTag>> {
-        use rustc::mir::Place::*;
-        use rustc::mir::PlaceBase;
-        use rustc::mir::{Static, StaticKind};
-        Ok(match *mir_place {
-            Base(PlaceBase::Static(box Static { kind: StaticKind::Promoted(promoted), .. })) => {
+        use rustc::mir::StaticKind;
+
+        Ok(match place_static.kind {
+            StaticKind::Promoted(promoted) => {
                 let instance = self.frame().instance;
                 self.const_eval_raw(GlobalId {
                     instance,
@@ -578,7 +577,8 @@ pub(super) fn eval_place_to_mplace(
                 })?
             }
 
-            Base(PlaceBase::Static(box Static { kind: StaticKind::Static(def_id), ty })) => {
+            StaticKind::Static(def_id) => {
+                let ty = place_static.ty;
                 assert!(!ty.needs_subst());
                 let layout = self.layout_of(ty)?;
                 let instance = ty::Instance::mono(*self.tcx, def_id);
@@ -600,8 +600,6 @@ pub(super) fn eval_place_to_mplace(
                 let alloc = self.tcx.alloc_map.lock().intern_static(cid.instance.def_id());
                 MPlaceTy::from_aligned_ptr(Pointer::from(alloc).with_default_tag(), layout)
             }
-
-            _ => bug!("eval_place_to_mplace called on {:?}", mir_place),
         })
     }
 
@@ -609,40 +607,42 @@ pub(super) fn eval_place_to_mplace(
     /// place; for reading, a more efficient alternative is `eval_place_for_read`.
     pub fn eval_place(
         &mut self,
-        mir_place: &mir::Place<'tcx>
+        mir_place: &mir::Place<'tcx>,
     ) -> EvalResult<'tcx, PlaceTy<'tcx, M::PointerTag>> {
-        use rustc::mir::Place::*;
         use rustc::mir::PlaceBase;
-        let place = match *mir_place {
-            Base(PlaceBase::Local(mir::RETURN_PLACE)) => match self.frame().return_place {
-                Some(return_place) =>
-                    // We use our layout to verify our assumption; caller will validate
-                    // their layout on return.
-                    PlaceTy {
-                        place: *return_place,
-                        layout: self.layout_of(self.monomorphize(self.frame().mir.return_ty())?)?,
+
+        mir_place.iterate(|place_base, place_projection| {
+            let mut place = match place_base {
+                PlaceBase::Local(mir::RETURN_PLACE) => match self.frame().return_place {
+                    Some(return_place) => {
+                        // We use our layout to verify our assumption; caller will validate
+                        // their layout on return.
+                        PlaceTy {
+                            place: *return_place,
+                            layout: self
+                                .layout_of(self.monomorphize(self.frame().mir.return_ty())?)?,
+                        }
+                    }
+                    None => return err!(InvalidNullPointerUsage),
+                },
+                PlaceBase::Local(local) => PlaceTy {
+                    // This works even for dead/uninitialized locals; we check further when writing
+                    place: Place::Local {
+                        frame: self.cur_frame(),
+                        local: *local,
                     },
-                None => return err!(InvalidNullPointerUsage),
-            },
-            Base(PlaceBase::Local(local)) => PlaceTy {
-                // This works even for dead/uninitialized locals; we check further when writing
-                place: Place::Local {
-                    frame: self.cur_frame(),
-                    local,
+                    layout: self.layout_of_local(self.frame(), *local, None)?,
                 },
-                layout: self.layout_of_local(self.frame(), local, None)?,
-            },
+                PlaceBase::Static(place_static) => self.eval_static_to_mplace(place_static)?.into(),
+            };
 
-            Projection(ref proj) => {
-                let place = self.eval_place(&proj.base)?;
-                self.place_projection(place, &proj.elem)?
+            for proj in place_projection {
+                place = self.place_projection(place, &proj.elem)?
             }
 
-            _ => self.eval_place_to_mplace(mir_place)?.into(),
-        };
-
-        self.dump_place(place.place);
-        Ok(place)
+            self.dump_place(place.place);
+            Ok(place)
+        })
     }
 
     /// Write a scalar to a place
@@ -686,7 +686,7 @@ fn write_immediate_no_validate(
                 Immediate::Scalar(ScalarMaybeUndef::Scalar(Scalar::Ptr(_))) =>
                     assert_eq!(self.pointer_size(), dest.layout.size,
                         "Size mismatch when writing pointer"),
-                Immediate::Scalar(ScalarMaybeUndef::Scalar(Scalar::Bits { size, .. })) =>
+                Immediate::Scalar(ScalarMaybeUndef::Scalar(Scalar::Raw { size, .. })) =>
                     assert_eq!(Size::from_bytes(size.into()), dest.layout.size,
                         "Size mismatch when writing bits"),
                 Immediate::Scalar(ScalarMaybeUndef::Undef) => {}, // undef can have any size