The SXTW extend mode is usually free when used in a load or store
operand, but it can slightly increase the latency of an arithmetic
instruction. This patch optimises some address calculations accordingly:
  - PrepareKeyedExternalArrayOperand.
  - BuildSeqStringOperand.
  - DoStringCharFromCode.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/247443002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/246603003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20890 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jarin@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/247383002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20889 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/240053010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20888 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

After this, the maps do not garbage-collect, and typed array
constructors do not deopt.

R=ulan@chromium.org
BUG=363855
LOG=N

Review URL: https://codereview.chromium.org/247343002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20887 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Generator function scopes have forced context allocation.  Ensure that
all variables in such scopes get context allocation -- even unused
variables.

This fixes an assertion when reifying generator scopes in the debugger.

R=yangguo@chromium.org
LOG=Y
BUG=v8:3280

Review URL: https://codereview.chromium.org/246733003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20883 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ulan@chromium.org
BUG=364656
LOG=N

Review URL: https://codereview.chromium.org/247093002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20882 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/247153003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20881 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/246133005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20880 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r20876, it broke non-snapshot tests.

TBR=bmeurer@chromium.org

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20879 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Basically a follow-up to r20851

TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/247193003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20878 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

indicate an exception. All usages but one changed to return
MaybeHandles, and to use macros around the call.

The remaining work is in Compiler::GetUnoptimizedCode(), and when
that is turned into a MaybeHandle, then the macros dealing with
null handle returns can be eliminated.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/247013002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20877 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This implies that one better has a v8::V8::Initialize when v8::V8::Dispose is used.

BUG=359977
LOG=y
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/238353015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20876 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/247063002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20875 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=http://www.chaostoperfection.com/
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/246963003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20874 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/238773009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20873 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/246423005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/240883003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20871 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Drive-by-fix: map_set() must return a pointer to the UniqueSet
instead of a copy.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/244383002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/246953002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20869 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

LOG=N
BUG=363976
R=bmeurer@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/243033002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20866 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/236753002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20863 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Update CheckBothSmi, CheckInteger32ValidSmiValue, CheckUInteger32ValidSmiValue, SmiAddConstant, SmiNot, AddSmiField and Test to support x32 port.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/236723004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20862 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r20855 (ac70e129)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/239173004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20859 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This was introduced by https://code.google.com/p/v8/source/detail?r=20857

R=adamk@chromium.org
TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/241433002

Patch from Erik Arvidsson <arv@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20858 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This implements MapIterator and SetIterator which matches
the same constructs in the ES6 spec. However, these 2
iterators are not exposed to user code yet. They are only
used internally to implement Map.prototype.forEach and
Set.prototype.forEach.

Each iterator has a reference to the OrderedHashTable where
it directly accesses the hash table's entries.

The OrderedHashTable has a reference to the newest iterator
and each iterator has a reference to the next and previous
iterator, effectively creating a double linked list.

When the OrderedHashTable is mutated (or replaced) all the
iterators are updated.

When the iterator iterates passed the end of the data table
it closes itself. Closed iterators no longer have a
reference to the OrderedHashTable and they are removed from
the double linked list. In the case of Map/Set forEach, we
manually call Close on the iterator in case an exception was
thrown so that the iterator never reached the end.

At this point the OrderedHashTable keeps all the non finished
iterators alive but since the only thing we currently expose
is forEach there are no unfinished iterators outside a forEach
call. Once we expose the iterators to user code we will need
to make the references from the OrderedHashTable to the
iterators weak and have some mechanism to close an iterator
when it is garbage collected.

BUG=1793, 2323
LOG=Y
R=adamk@chromium.org
TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/238063009

Patch from Erik Arvidsson <arv@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20857 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/241023002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20856 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=hpayer@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/240193002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20855 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=hpayer@chromium.org, jkummerow@chromium.org

Review URL: https://codereview.chromium.org/239333015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20854 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Initialize elements pointer in BuildCloneShallowArray when allocation folding is turned off for arrays with lenght larger than zero.

BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/240933003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20853 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org, yannguo@chromium.org

Review URL: https://codereview.chromium.org/240093003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20852 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

... to compansate for the extre memory consumed by r20840
("Select function map based on prototype and shared function info.")

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/239513015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20851 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This makes our builtins immune to bug v8:3264.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/241003002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20850 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/238443016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20849 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/241013002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20848 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r20831 (f91f993)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/240503008

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/239243018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20846 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/240393003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20845 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/240493007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20844 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/219173003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20843 ce2b1a6d-e550-0410-aec6-3dcde31c8c00