Limit the number of transitions allowed per hidden class.

Each time a transition is added to a hidden class, the whole
transitions array must be copied, which causes poor performance
in some circumstances.  This change limits the maximum size of
the transition array, avoiding this behavior in the pathological
case.  For example, this improves the performance of the EtchMark
benchmark by nearly 60%.

BUG=v8:3616
LOG=
R=verwaest@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/635883003

Patch from Kevin M. McCormick <mckev@amazon.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24857 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Make block writes in the serializer more efficient.

And also fix a OOB read in SerializeExternalString.

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/671633004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24858 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
X87: Classes: implement 'new super'.

port r24825.

original commit message:

  Classes: implement 'new super'.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/663233003

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24859 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Unbreak c1visualizer.

TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/673873004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24860 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Log code event for deserialized code.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/663453005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24861 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[x86] Fix register constraints for multiply-high.

TEST=mjsunit/compiler,unittests
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/671393002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24862 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Whitespace change to test gnumbd.

TBR=agable@chromium.org

Review URL: https://codereview.chromium.org/672293006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24863 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Whitespace change.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24864 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Whitespace change.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24865 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
PropertyICCompiler: expose monomorphic keyed load handler creation.

Simple refactoring that is useful for upcoming --vector-ic changes.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/673933005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24866 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Generate fake basic block for Terminate node.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/650633003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24867 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use memcpy in List::AddAll for fundamental types.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/663893004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24868 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Improve printing for Symbols.

Private symbols we create in the heap don't have names, but we can
resolve them to a constant string.

This gives handy debugger output like:

(gdb) job 0x2020c67d
0x2020c67d: [Symbol]
 - hash: 547385396
 - name: 0x20208091 <undefined> (uninitialized_symbol)
 - private: 1
 - own: 1
$7 = void
(gdb)

or with ShortPrint() in an array:

...
  [5]: 0x2020c67d <Symbol: 547385396 (uninitialized_symbol)>
...

Printing help for internal symbols

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/677633003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24869 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
TurboFan calls to vector-based ics need to resolve a slot to an index.

This is to cope with the recent division of the TypeFeedbackVector into
Slots and ICSlots.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/673203002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Tweaks to the code serializer.

- consider the source string as a special sort of back reference.
- use repeat op code for more root members.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/674883002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24871 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Enable --serialize-toplevel by default.

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/661343003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
AstValueFactory: make true, false, null, undefined and "the hole" unique values.

They were not, so we were creating several instances of them, one for each time
they occurred in the source code.

It's not known to have caused efficiency problems though, so this is a sanity
fix more than an efficiency fix.

Note that numbers are still not unique.

BUG=
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/657893003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24873 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add Float64Floor, Float64Ceil, Float64RoundTruncate, Float64RoundTiesAway operators.

These operators are not supported by any backends yet, and a backend is free to not support them.

R=bmeurer@chromium.org
TEST=unittest/machine-operator

Review URL: https://codereview.chromium.org/668173002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24874 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
only define ARRAYSIZE_UNSAFE for NaCl builds

Now that C++11 is allowed, we can use arraysize instead of
ARRAYSIZE_UNSAFE, except in NaCl builds.  So let's move this
macro inside an NaCl ifdef.

BUG=chromium:405225
LOG=y
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/668303002

Patch from Mostyn Bramley-Moore <mostynb@opera.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24875 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add Schedule::InsertBranch to fuse control flow graphs.

R=jarin@chromium.org
TEST=cctest/test-schedule/TestScheduleInsertBranch

Review URL: https://codereview.chromium.org/675983002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24876 ce2b1a6d-e550-0410-aec6-3dcde31c8c00