Move some heap verification code in under the --verify-heap flag to speed

src/store-buffer.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 372 matching lines @@
         slot_address += kPointerSize;
       }
     }
   }
 }
 #endif
 
 
 void StoreBuffer::Verify() {
 #ifdef DEBUG
-  if (FLAG_enable_slow_asserts || FLAG_verify_heap) {
-    VerifyPointers(heap_->old_pointer_space(),
-                   &StoreBuffer::FindPointersToNewSpaceInRegion);
-    VerifyPointers(heap_->map_space(),
-                   &StoreBuffer::FindPointersToNewSpaceInMapsRegion);
-    VerifyPointers(heap_->lo_space());
-  }
+  VerifyPointers(heap_->old_pointer_space(),
+                 &StoreBuffer::FindPointersToNewSpaceInRegion);
+  VerifyPointers(heap_->map_space(),
+                 &StoreBuffer::FindPointersToNewSpaceInMapsRegion);
+  VerifyPointers(heap_->lo_space());
 #endif
 }
 
 
 void StoreBuffer::GCEpilogue() {
   during_gc_ = false;
-  Verify();
+  if (FLAG_verify_heap) {
+    Verify();
+  }
 }
 
 
 void StoreBuffer::FindPointersToNewSpaceInRegion(
     Address start, Address end, ObjectSlotCallback slot_callback) {
   for (Address slot_address = start;
        slot_address < end;
        slot_address += kPointerSize) {
     Object** slot = reinterpret_cast<Object**>(slot_address);
     if (heap_->InNewSpace(*slot)) {
@@ skipping 270 matching lines @@
 }
 
 
 void StoreBuffer::CheckForFullBuffer() {
   if (old_limit_ - old_top_ < kStoreBufferSize * 2) {
     HandleFullness();
   }
 }
 
 } }  // namespace v8::internal