librustc: De-@mut n_static_tydescs in the stats

Author: pcwalton

src/librustc/middle/trans/base.rs

@@ -454,7 +454,7 @@ pub fn get_tydesc(ccx: &CrateContext, t: ty::t) -> @tydesc_info {
         }
     }
 
-    ccx.stats.n_static_tydescs += 1u;
+    ccx.stats.n_static_tydescs.set(ccx.stats.n_static_tydescs.get() + 1u);
     let inf = glue::declare_tydesc(ccx, t);
 
     let mut tydescs = ccx.tydescs.borrow_mut();
@@ -3245,7 +3245,7 @@ pub fn trans_crate(sess: session::Session,
     let metadata = write_metadata(ccx, &crate);
     if ccx.sess.trans_stats() {
         println("--- trans stats ---");
-        println!("n_static_tydescs: {}", ccx.stats.n_static_tydescs);
+        println!("n_static_tydescs: {}", ccx.stats.n_static_tydescs.get());
         println!("n_glues_created: {}", ccx.stats.n_glues_created);
         println!("n_null_glues: {}", ccx.stats.n_null_glues);
         println!("n_real_glues: {}", ccx.stats.n_real_glues);

src/librustc/middle/trans/common.rs

@@ -126,7 +126,7 @@ pub struct tydesc_info {
  */
 
 pub struct Stats {
-    n_static_tydescs: uint,
+    n_static_tydescs: Cell<uint>,
     n_glues_created: uint,
     n_null_glues: uint,
     n_real_glues: uint,

src/librustc/middle/trans/context.rs

@@ -211,7 +211,7 @@ impl CrateContext {
                   tcx: tcx,
                   maps: maps,
                   stats: @mut Stats {
-                    n_static_tydescs: 0u,
+                    n_static_tydescs: Cell::new(0u),
                     n_glues_created: 0u,
                     n_null_glues: 0u,
                     n_real_glues: 0u,