---

yaml
---
r: 88967
b: refs/heads/snap-stage3
c: 7b71ca3
h: refs/heads/master
i:
  88965: 1c6f370
  88963: 941c65f
  88959: fa97590
v: v3

Author: pcwalton

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: deeca5d586bfaa4aa60246f671a8d611d38f6248
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: 2fb33285e6169552e58d10197c11cd2f8702291f
+refs/heads/snap-stage3: 7b71ca3ef7d30814d72f9e41752c6c24f4168cde
 refs/heads/try: b160761e35efcd1207112b3b782c06633cf441a8
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/src/librustc/middle/liveness.rs

@@ -110,6 +110,7 @@ use middle::typeck;
 use middle::moves;
 
 use std::cast::transmute;
+use std::cell::RefCell;
 use std::hashmap::HashMap;
 use std::io;
 use std::str;
@@ -577,7 +578,7 @@ static ACC_READ: uint = 1u;
 static ACC_WRITE: uint = 2u;
 static ACC_USE: uint = 4u;
 
-type LiveNodeMap = @mut HashMap<NodeId, LiveNode>;
+type LiveNodeMap = @RefCell<HashMap<NodeId, LiveNode>>;
 
 pub struct Liveness {
     tcx: ty::ctxt,
@@ -604,8 +605,8 @@ fn Liveness(ir: @mut IrMaps, specials: Specials) -> Liveness {
         users: @mut vec::from_elem(ir.num_live_nodes * ir.num_vars,
                                    invalid_users()),
         loop_scope: @mut ~[],
-        break_ln: @mut HashMap::new(),
-        cont_ln: @mut HashMap::new()
+        break_ln: @RefCell::new(HashMap::new()),
+        cont_ln: @RefCell::new(HashMap::new()),
     }
 }
 
@@ -1091,7 +1092,8 @@ impl Liveness {
               // Now that we know the label we're going to,
               // look it up in the break loop nodes table
 
-              match self.break_ln.find(&sc) {
+              let break_ln = self.break_ln.borrow();
+              match break_ln.get().find(&sc) {
                   Some(&b) => b,
                   None => self.tcx.sess.span_bug(expr.span,
                                                  "Break to unknown label")
@@ -1105,7 +1107,8 @@ impl Liveness {
               // Now that we know the label we're going to,
               // look it up in the continue loop nodes table
 
-              match self.cont_ln.find(&sc) {
+              let cont_ln = self.cont_ln.borrow();
+              match cont_ln.get().find(&sc) {
                   Some(&b) => b,
                   None => self.tcx.sess.span_bug(expr.span,
                                                  "Loop to unknown label")
@@ -1383,8 +1386,12 @@ impl Liveness {
                            -> R {
       debug!("with_loop_nodes: {} {}", loop_node_id, *break_ln);
         self.loop_scope.push(loop_node_id);
-        self.break_ln.insert(loop_node_id, break_ln);
-        self.cont_ln.insert(loop_node_id, cont_ln);
+        {
+            let mut this_break_ln = self.break_ln.borrow_mut();
+            let mut this_cont_ln = self.cont_ln.borrow_mut();
+            this_break_ln.get().insert(loop_node_id, break_ln);
+            this_cont_ln.get().insert(loop_node_id, cont_ln);
+        }
         let r = f();
         self.loop_scope.pop();
         r