Show RegExp calls in the profile.

Show RegExp calls in the profile.

It turns out they were filtered out. But when I unfiltered them, I
discovered another issue: when DevTools run, regexp literals get
recompiled each time they called (looks like this is concerned with
switching to full compiler), so I ended up having multiple entries for
the same regexp. To fix this, I changed the way of how code entries
equivalence is considered.

BUG=crbug/55999
TEST=cctest/test-profile-generator/ProfileNodeFindOrAddChildForSameFunction
(the test isn't for the whole issue, but rather for equivalence testing)

Committed: http://code.google.com/p/v8/source/detail?r=5492

[Søren Thygesen Gjesse, 2010-09-20 06:34:19]

LGTM

Could there be times where the same function(source wise) being recompiled
should be different functions? e.g. after page reload?

[mnaganov (inactive), 2010-09-20 09:24:38]

On 2010/09/20 06:34:19, Søren Gjesse wrote:
> LGTM
>

Thanks!
 
> Could there be times where the same function(source wise) being recompiled
> should be different functions? e.g. after page reload?

Surely that's possible. But I think this is a lesser issue than reporting the
same regexp multiple times.