[turbofan] Greedy: split around calls heuristic.

[turbofan] Greedy: split around calls heuristic.

Once  a range is found to have a conflict, split around all the calls it
crosses over, since it will anyway have conflicts there, too.

Incrementally, from the last change to greedy, this change brings
overall improvement in benchmarks. In fact, except for 2 regressions
in Jetstream (splay-latency and date-format-xparb, at 6 and 7%
respectivelly), everything else is in the green or noise. Quite a few
benchmarks are over 3%, with a few (zlib, for example) in the double
digits.

Committed: https://crrev.com/db646fb2f88cb30042a8bc79281e129f4ce36de0
Cr-Commit-Position: refs/heads/master@{#30579}

[Mircea Trofin, 2015-09-04 05:59:20]

mtrofin@chromium.org changed reviewers:
+ bmeurer@chromium.org, jarin@chromium.org

[Jarin, 2015-09-04 06:47:46]

lgtm

[Mircea Trofin, 2015-09-04 06:48:05]

The CQ bit was checked by mtrofin@chromium.org

[commit-bot: I haz the power, 2015-09-04 06:48:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1328783002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1328783002/40001

[commit-bot: I haz the power, 2015-09-04 06:50:23]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-09-04 06:50:39]

Patchset 3 (id:??) landed as
https://crrev.com/db646fb2f88cb30042a8bc79281e129f4ce36de0
Cr-Commit-Position: refs/heads/master@{#30579}