Move undef mask methods from Memory to Allocation

src/librustc/mir/interpret/allocation.rs

@@ -206,6 +206,39 @@ impl<'tcx, Tag, Extra> Allocation<Tag, Extra> {
     }
 }
 
+
+/// Undefined bytes
+impl<'tcx, Tag, Extra> Allocation<Tag, Extra> {
+    /// Checks that a range of bytes is defined. If not, returns the `ReadUndefBytes`
+    /// error which will report the first byte which is undefined.
+    #[inline]
+    fn check_defined(&self, ptr: Pointer<M::PointerTag>, size: Size) -> EvalResult<'tcx> {
+        let alloc = self.get(ptr.alloc_id)?;
+        alloc.undef_mask.is_range_defined(
+            ptr.offset,
+            ptr.offset + size,
+        ).or_else(|idx| err!(ReadUndefBytes(idx)))
+    }
+
+    pub fn mark_definedness(
+        &mut self,
+        ptr: Pointer<M::PointerTag>,
+        size: Size,
+        new_state: bool,
+    ) -> EvalResult<'tcx> {
+        if size.bytes() == 0 {
+            return Ok(());
+        }
+        let alloc = self.get_mut(ptr.alloc_id)?;
+        alloc.undef_mask.set_range(
+            ptr.offset,
+            ptr.offset + size,
+            new_state,
+        );
+        Ok(())
+    }
+}
+
 pub trait AllocationExtra<Tag>: ::std::fmt::Debug + Default + Clone {
     /// Hook for performing extra checks on a memory read access.
     ///

src/librustc_mir/interpret/memory.rs

@@ -984,33 +984,4 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> Memory<'a, 'mir, 'tcx, M> {
 
         Ok(())
     }
-
-    /// Checks that a range of bytes is defined. If not, returns the `ReadUndefBytes`
-    /// error which will report the first byte which is undefined.
-    #[inline]
-    fn check_defined(&self, ptr: Pointer<M::PointerTag>, size: Size) -> EvalResult<'tcx> {
-        let alloc = self.get(ptr.alloc_id)?;
-        alloc.undef_mask.is_range_defined(
-            ptr.offset,
-            ptr.offset + size,
-        ).or_else(|idx| err!(ReadUndefBytes(idx)))
-    }
-
-    pub fn mark_definedness(
-        &mut self,
-        ptr: Pointer<M::PointerTag>,
-        size: Size,
-        new_state: bool,
-    ) -> EvalResult<'tcx> {
-        if size.bytes() == 0 {
-            return Ok(());
-        }
-        let alloc = self.get_mut(ptr.alloc_id)?;
-        alloc.undef_mask.set_range(
-            ptr.offset,
-            ptr.offset + size,
-            new_state,
-        );
-        Ok(())
-    }
 }