librustc: De-`@mut` `n_glues_created` in the stats

src/librustc/middle/trans/base.rs

@@ -3246,7 +3246,7 @@ pub fn trans_crate(sess: session::Session,
     if ccx.sess.trans_stats() {
         println("--- trans stats ---");
         println!("n_static_tydescs: {}", ccx.stats.n_static_tydescs.get());
-        println!("n_glues_created: {}", ccx.stats.n_glues_created);
+        println!("n_glues_created: {}", ccx.stats.n_glues_created.get());
         println!("n_null_glues: {}", ccx.stats.n_null_glues);
         println!("n_real_glues: {}", ccx.stats.n_real_glues);
 

src/librustc/middle/trans/common.rs

@@ -127,7 +127,7 @@ pub struct tydesc_info {
 
 pub struct Stats {
     n_static_tydescs: Cell<uint>,
-    n_glues_created: uint,
+    n_glues_created: Cell<uint>,
     n_null_glues: uint,
     n_real_glues: uint,
     n_fns: uint,

src/librustc/middle/trans/context.rs

@@ -212,7 +212,7 @@ pub fn new(sess: session::Session,
                   maps: maps,
                   stats: @mut Stats {
                     n_static_tydescs: Cell::new(0u),
-                    n_glues_created: 0u,
+                    n_glues_created: Cell::new(0u),
                     n_null_glues: 0u,
                     n_real_glues: 0u,
                     n_fns: 0u,

src/librustc/middle/trans/glue.rs

@@ -662,7 +662,7 @@ pub fn make_generic_glue_inner(ccx: @CrateContext,
     let _icx = push_ctxt("make_generic_glue_inner");
     let fcx = new_fn_ctxt(ccx, ~[], llfn, ty::mk_nil(), None);
     lib::llvm::SetLinkage(llfn, lib::llvm::InternalLinkage);
-    ccx.stats.n_glues_created += 1u;
+    ccx.stats.n_glues_created.set(ccx.stats.n_glues_created.get() + 1u);
     // All glue functions take values passed *by alias*; this is a
     // requirement since in many contexts glue is invoked indirectly and
     // the caller has no idea if it's dealing with something that can be