[heap] Remove heap-local variable caching FLAG_concurrent_sweeping

src/heap/mark-compact.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/mark-compact.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/sys-info.h"
 #include "src/code-stubs.h"
@@ skipping 543 matching lines @@
       // We were not able to sweep that page, i.e., a concurrent
       // sweeper thread currently owns this page. Wait for the sweeper
       // thread to be done with this page.
       page->WaitUntilSweepingCompleted();
     }
   }
 }
 
 
 void MarkCompactCollector::SweepAndRefill(CompactionSpace* space) {
-  if (heap()->concurrent_sweeping_enabled() && !IsSweepingCompleted()) {
+  if (FLAG_concurrent_sweeping && !IsSweepingCompleted()) {
     SweepInParallel(heap()->paged_space(space->identity()), 0);
     space->RefillFreeList();
   }
 }
 
 
 void MarkCompactCollector::EnsureSweepingCompleted() {
   DCHECK(sweeping_in_progress_ == true);
 
   // If sweeping is not completed or not running at all, we try to complete it
   // here.
-  if (!heap()->concurrent_sweeping_enabled() || !IsSweepingCompleted()) {
+  if (!FLAG_concurrent_sweeping || !IsSweepingCompleted()) {
     SweepInParallel(heap()->paged_space(OLD_SPACE), 0);
     SweepInParallel(heap()->paged_space(CODE_SPACE), 0);
     SweepInParallel(heap()->paged_space(MAP_SPACE), 0);
   }
 
-  if (heap()->concurrent_sweeping_enabled()) {
+  if (FLAG_concurrent_sweeping) {
     pending_sweeper_tasks_semaphore_.Wait();
     pending_sweeper_tasks_semaphore_.Wait();
     pending_sweeper_tasks_semaphore_.Wait();
   }
 
   ParallelSweepSpacesComplete();
   sweeping_in_progress_ = false;
   heap()->old_space()->RefillFreeList();
   heap()->code_space()->RefillFreeList();
   heap()->map_space()->RefillFreeList();
@@ skipping 3248 matching lines @@
       GCTracer::Scope sweep_scope(heap()->tracer(),
                                   GCTracer::Scope::MC_SWEEP_CODE);
       SweepSpace(heap()->code_space(), CONCURRENT_SWEEPING);
     }
     {
       GCTracer::Scope sweep_scope(heap()->tracer(),
                                   GCTracer::Scope::MC_SWEEP_MAP);
       SweepSpace(heap()->map_space(), CONCURRENT_SWEEPING);
     }
     sweeping_in_progress_ = true;
-    if (heap()->concurrent_sweeping_enabled()) {
+    if (FLAG_concurrent_sweeping) {
       StartSweeperThreads();
     }
   }
 
   // Deallocate unmarked large objects.
   heap_->lo_space()->FreeUnmarkedObjects();
 
   // Give pages that are queued to be freed back to the OS. Invalid store
   // buffer entries are already filter out. We can just release the memory.
   heap()->FreeQueuedChunks();
@@ skipping 112 matching lines @@
     MarkBit mark_bit = Marking::MarkBitFrom(host);
     if (Marking::IsBlack(mark_bit)) {
       RelocInfo rinfo(isolate(), pc, RelocInfo::CODE_TARGET, 0, host);
       RecordRelocSlot(&rinfo, target);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8