Perform new space evacuation based on marking bits.

Perform new space evacuation based on marking bits.

BUG=
R=titzer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=15621

[titzer, 2013-07-11 10:05:33]

lgtm

https://codereview.chromium.org/18531004/diff/1/src/mark-compact.cc
File src/mark-compact.cc (right):

https://codereview.chromium.org/18531004/diff/1/src/mark-compact.cc#newcode1994
src/mark-compact.cc:1994: NewSpacePage* p) {
Please add a TODO here and in the other places which this code appears that we
should have a mark bits iterator.

[Hannes Payer (out of office), 2013-07-11 11:14:16]

https://codereview.chromium.org/18531004/diff/1/src/mark-compact.cc
File src/mark-compact.cc (right):

https://codereview.chromium.org/18531004/diff/1/src/mark-compact.cc#newcode1994
src/mark-compact.cc:1994: NewSpacePage* p) {
On 2013/07/11 10:05:33, titzer wrote:
> Please add a TODO here and in the other places which this code appears that we
> should have a mark bits iterator.

I am not adding the todo, I am building the iterator now.

https://codereview.chromium.org/18531004/diff/1/src/mark-compact.cc#newcode2024
src/mark-compact.cc:2024: for (unsigned int i =
CompilerIntrinsics::CountTrailingZeros(current_cell);
I changed that part, could you have another look?

[Hannes Payer (out of office), 2013-07-11 11:24:42]

Committed patchset #2 manually as r15621 (presubmit successful).