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

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

Committed: http://code.google.com/p/v8/source/detail?r=14071

[haitao.feng, 2013-03-15 22:10:06]

Instead of kPointerSize comparison.

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

https://codereview.chromium.org/12452012/diff/1/src/spaces.cc
File src/spaces.cc (right):

https://codereview.chromium.org/12452012/diff/1/src/spaces.cc#newcode1034
src/spaces.cc:1034: // On x64 we allocate code pages in a special way (from the
reserved
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.

[haitao.feng, 2013-03-19 01:41:59]

Thanks for the review. This change is for X32. The kPointerSize is 4 for X32
while code range exists. The comments are updated.

[danno, 2013-03-25 17:21:19]

lgtm

[danno, 2013-03-25 17:28:01]

Committed patchset #2 manually as r14071 (presubmit successful).