From 752a1a46685412202153c53ae320957cb48c751b Mon Sep 17 00:00:00 2001
From: Christian Poveda <cpovedar@fnal.gov>
Date: Thu, 20 Jun 2019 16:52:17 -0500
Subject: [PATCH] Updated tag methods for consistency

---
 src/librustc_mir/const_eval.rs        |  6 +++---
 src/librustc_mir/interpret/machine.rs |  4 ++--
 src/librustc_mir/interpret/memory.rs  | 14 +++++++-------
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/librustc_mir/const_eval.rs b/src/librustc_mir/const_eval.rs
index 7d05e7be26eb..46c16e9ceae0 100644
--- a/src/librustc_mir/const_eval.rs
+++ b/src/librustc_mir/const_eval.rs
@@ -25,7 +25,7 @@ use crate::interpret::{self,
     PlaceTy, MPlaceTy, MemPlace, OpTy, ImmTy, Immediate, Scalar,
     RawConst, ConstValue,
     InterpResult, InterpErrorInfo, InterpError, GlobalId, InterpretCx, StackPopCleanup,
-    Allocation, AllocId, MemoryKind,
+    Allocation, AllocId, MemoryKind, Memory,
     snapshot, RefTracking,
 };
 
@@ -404,7 +404,7 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
         _id: AllocId,
         alloc: Cow<'b, Allocation>,
         _kind: Option<MemoryKind<!>>,
-        _memory_extra: &(),
+        _memory: &Memory<'mir, 'tcx, Self>,
     ) -> (Cow<'b, Allocation<Self::PointerTag>>, Self::PointerTag) {
         // We do not use a tag so we can just cheaply forward the allocation
         (alloc, ())
@@ -413,7 +413,7 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
     #[inline(always)]
     fn tag_static_base_pointer(
         _id: AllocId,
-        _memory_extra: &(),
+        _memory: &Memory<'mir, 'tcx, Self>,
     ) -> Self::PointerTag {
         ()
     }
diff --git a/src/librustc_mir/interpret/machine.rs b/src/librustc_mir/interpret/machine.rs
index f06c0314919a..4eb95f20d935 100644
--- a/src/librustc_mir/interpret/machine.rs
+++ b/src/librustc_mir/interpret/machine.rs
@@ -177,7 +177,7 @@ pub trait Machine<'mir, 'tcx>: Sized {
         id: AllocId,
         alloc: Cow<'b, Allocation>,
         kind: Option<MemoryKind<Self::MemoryKinds>>,
-        memory_extra: &Self::MemoryExtra,
+        memory: &Memory<'mir, 'tcx, Self>,
     ) -> (Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>>, Self::PointerTag);
 
     /// Return the "base" tag for the given static allocation: the one that is used for direct
@@ -187,7 +187,7 @@ pub trait Machine<'mir, 'tcx>: Sized {
     /// for cyclic statics!
     fn tag_static_base_pointer(
         id: AllocId,
-        memory_extra: &Self::MemoryExtra,
+        memory: &Memory<'mir, 'tcx, Self>,
     ) -> Self::PointerTag;
 
     /// Executes a retagging operation
diff --git a/src/librustc_mir/interpret/memory.rs b/src/librustc_mir/interpret/memory.rs
index 1351d154df7c..b431166a9161 100644
--- a/src/librustc_mir/interpret/memory.rs
+++ b/src/librustc_mir/interpret/memory.rs
@@ -105,7 +105,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
 
     #[inline]
     pub fn tag_static_base_pointer(&self, ptr: Pointer) -> Pointer<M::PointerTag> {
-        ptr.with_tag(M::tag_static_base_pointer(ptr.alloc_id, &self.extra))
+        ptr.with_tag(M::tag_static_base_pointer(ptr.alloc_id, &self))
     }
 
     pub fn create_fn_alloc(&mut self, instance: Instance<'tcx>) -> Pointer<M::PointerTag> {
@@ -138,7 +138,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         kind: MemoryKind<M::MemoryKinds>,
     ) -> Pointer<M::PointerTag> {
         let id = self.tcx.alloc_map.lock().reserve();
-        let (alloc, tag) = M::tag_allocation(id, Cow::Owned(alloc), Some(kind), &self.extra);
+        let (alloc, tag) = M::tag_allocation(id, Cow::Owned(alloc), Some(kind), &self);
         self.alloc_map.insert(id, (kind, alloc.into_owned()));
         Pointer::from(id).with_tag(tag)
     }
@@ -325,7 +325,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
     fn get_static_alloc(
         id: AllocId,
         tcx: TyCtxtAt<'tcx>,
-        memory_extra: &M::MemoryExtra,
+        memory: &Memory<'mir, 'tcx, M>,
     ) -> InterpResult<'tcx, Cow<'tcx, Allocation<M::PointerTag, M::AllocExtra>>> {
         let alloc = tcx.alloc_map.lock().get(id);
         let alloc = match alloc {
@@ -372,7 +372,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
             id, // always use the ID we got as input, not the "hidden" one.
             alloc,
             M::STATIC_KIND.map(MemoryKind::Machine),
-            memory_extra
+            memory
         ).0)
     }
 
@@ -385,7 +385,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         // `get_static_alloc` that we can actually use directly without inserting anything anywhere.
         // So the error type is `InterpResult<'tcx, &Allocation<M::PointerTag>>`.
         let a = self.alloc_map.get_or(id, || {
-            let alloc = Self::get_static_alloc(id, self.tcx, &self.extra).map_err(Err)?;
+            let alloc = Self::get_static_alloc(id, self.tcx, &self).map_err(Err)?;
             match alloc {
                 Cow::Borrowed(alloc) => {
                     // We got a ref, cheaply return that as an "error" so that the
@@ -414,11 +414,11 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         id: AllocId,
     ) -> InterpResult<'tcx, &mut Allocation<M::PointerTag, M::AllocExtra>> {
         let tcx = self.tcx;
-        let memory_extra = &self.extra;
+        let alloc = Self::get_static_alloc(id, tcx, &self);
         let a = self.alloc_map.get_mut_or(id, || {
             // Need to make a copy, even if `get_static_alloc` is able
             // to give us a cheap reference.
-            let alloc = Self::get_static_alloc(id, tcx, memory_extra)?;
+            let alloc = alloc?;
             if alloc.mutability == Mutability::Immutable {
                 return err!(ModifiedConstantMemory);
             }