Bug 1360526 - Refactor queing arenas for sweeping to use a single loop r=sfink

--HG--
extra : rebase_source : 0dc02838c0ad9e365b3975ce1642a3da390fe21f

js/src/jsgc.cpp

@@ -5266,26 +5266,19 @@ GCRuntime::beginSweepingSweepGroup(AutoLockForExclusiveAccess& lock)
             joinTask(task, gcstats::PHASE_SWEEP_MISC, helperLock);
     }
 
-    /*
-     * Queue all GC things in all zones for sweeping, either in the
-     * foreground or on the background thread.
-     *
-     * Note that order is important here for the background case.
-     */
+    // Queue all GC things in all zones for sweeping, either on the foreground
+    // or on the background thread.
 
     for (GCSweepGroupIter zone(rt); !zone.done(); zone.next()) {
         gcstats::AutoSCC scc(stats(), sweepGroupIndex);
+
         zone->arenas.queueForForegroundSweep(&fop, ForegroundObjectFinalizePhase);
         for (unsigned i = 0; i < ArrayLength(IncrementalFinalizePhases); ++i)
             zone->arenas.queueForForegroundSweep(&fop, IncrementalFinalizePhases[i]);
-    }
-    for (GCSweepGroupIter zone(rt); !zone.done(); zone.next()) {
-        gcstats::AutoSCC scc(stats(), sweepGroupIndex);
+
         for (unsigned i = 0; i < ArrayLength(BackgroundFinalizePhases); ++i)
             zone->arenas.queueForBackgroundSweep(&fop, BackgroundFinalizePhases[i]);
-    }
-    for (GCSweepGroupIter zone(rt); !zone.done(); zone.next()) {
-        gcstats::AutoSCC scc(stats(), sweepGroupIndex);
+
         zone->arenas.queueForegroundThingsForSweep(&fop);
     }