Fix %SetFlags("--stress-compaction")

BUG=369943
LOG=N
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/261253006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21260 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/spaces-inl.h

@@ -290,21 +290,6 @@ AllocationResult PagedSpace::AllocateRaw(int size_in_bytes) {
 
 AllocationResult NewSpace::AllocateRaw(int size_in_bytes) {
   Address old_top = allocation_info_.top();
-#ifdef DEBUG
-  // If we are stressing compaction we waste some memory in new space
-  // in order to get more frequent GCs.
-  if (FLAG_stress_compaction && !heap()->linear_allocation()) {
-    if (allocation_info_.limit() - old_top >= size_in_bytes * 4) {
-      int filler_size = size_in_bytes * 4;
-      for (int i = 0; i < filler_size; i += kPointerSize) {
-        *(reinterpret_cast<Object**>(old_top + i)) =
-            heap()->one_pointer_filler_map();
-      }
-      old_top += filler_size;
-      allocation_info_.set_top(allocation_info_.top() + filler_size);
-    }
-  }
-#endif
 
   if (allocation_info_.limit() - old_top < size_in_bytes) {
     return SlowAllocateRaw(size_in_bytes);

test/mjsunit/regress/regress-set-flags-stress-compact.js

+// Copyright 2014 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.
+
+// Flags: --allow-natives-syntax
+
+%SetFlags("--gc-interval=164 --stress-compaction");
+
+var a = [];
+for (var i = 0; i < 10000; i++) { a[i * 100] = 0; }