Use code_range()->exists() to determine the size of the first code page when code range is used.

src/spaces.cc

Index: src/spaces.cc
===================================================================
--- src/spaces.cc	(revision 13960)
+++ src/spaces.cc	(working copy)
@@ -1030,9 +1030,9 @@
       size = 16 * kPointerSize * KB;
       break;
     case CODE_SPACE:
-      if (kPointerSize == 8) {
+      if (heap()->isolate()->code_range()->exists()) {
         // On x64 we allocate code pages in a special way (from the reserved

[danno, 2013/03/18 13:09:03]

Why this change at all? What's the motivation? And by making the change, it
seems that it's no longer 64-bit specific, any platform with a code range will
qualify, so the comment doesn't seem right anymore.

-        // 2Byte area). That part of the code is not yet upgraded to handle
+        // 512M byte area). That part of the code is not yet upgraded to handle
         // small pages.
         size = AreaSize();
       } else {