Clearing this stub doesn't actually make sense, as it neither leaks
memory, nor prevents finding a new optimum stable state. As
long as strings receivers are observed, this is the best stub.
The moment we see a non-string receiver we'll go polymorphic
or generic depending on the case.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/605013003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24360 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Hydrogenize (and share) part of StoreTransition handler as a StoreTransitionStub and StoreField handler simplification.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/609463003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24333 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://codereview.chromium.org/618643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24319 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

MIPS: Fix r24286 "ExtendStorageStub added, it is aimed for extending objects backing store when it runs out of space".

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/605873005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24293 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/587203002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24286 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:417508
LOG=y
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/604703006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24221 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/597943003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24202 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=416416
LOG=N
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/587363002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24174 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/592113002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24139 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r24120.

original commit message:
   Make KeyedLoads from a sloppy arguments array use a handler.
   Before, a custom stub was installed

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/594773002

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24128 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r24120 (eed5963)

Original commit message:
Before, a custom stub was installed.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/594563003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24126 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Before, a custom stub was installed.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/546683003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24120 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/579713002

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24102 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/585983002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24098 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r24042.

original commit message:

  Convert KeyedLoad indexed interceptor case to a Handler.

  Currently, KeyedLoads on objects with indexed interceptors are handled with a
  special stub. Instead, key on the map and handler mechanism for more uniform
  treatment.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/581273005

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24063 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r24042 (eb9b9ec)

Original commit message:
Currently, KeyedLoads on objects with indexed interceptors are handled with a
special stub. Instead, key on the map and handler mechanism for more uniform
treatment.

BUG=
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/579273002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24047 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Currently, KeyedLoads on objects with indexed interceptors are handled with a
special stub. Instead, key on the map and handler mechanism for more uniform
treatment.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/575373004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24042 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

These sentinels were in the wrong place, living in only tangentially related class TypeFeedbackInfo, but they codify state in the TypeFeedbackVector.

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/579153003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24037 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r23977.

original commit message:

  Removing ic.h from code-stubs.h

  CodeStubs use state types defined in ic.h, but this has the unfortunate effect of spreading ic.h all over the place. Instead, define these shared state types in ic-public.h and allow ic.h to concern itself with internal state change of the ICs.

  More work could/should be done here, but this is a first step.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/573123003

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23992 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r23977 (d0cba839)

Original commit message:
CodeStubs use state types defined in ic.h, but this has the unfortunate effect of spreading ic.h all over the place. Instead, define these shared state types in ic-public.h and allow ic.h to concern itself with internal state change of the ICs.

More work could/should be done here, but this is a first step.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/574493004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23984 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

CodeStubs use state types defined in ic.h, but this has the unfortunate effect of spreading ic.h all over the place. Instead, define these shared state types in ic-public.h and allow ic.h to concern itself with internal state change of the ICs.

More work could/should be done here, but this is a first step.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/565873002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23977 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/570293002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23975 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r23854.

original commit message:

  Added CallInterfaceDescriptors to all code stubs. A handful
  of code stubs are too complex to be described this way, and
  they are encoded with the macro
  DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR().

  Along the way:
  * allowed inheritance of CallInterfaceDescriptors.
  * Defined static Register methods for some of the new
    CallInterfaceDescriptors. We could go a lot further here, but
    it doesn't have to be done immediately.
  * Added Representation arrays to some CallInterfaceDescriptors,
    especially where future hydrogen versions of the stubs could
    benefit from this knowledge.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/566843004

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23898 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r23772.

original commit message:

  To aid vector-based load ic work, we need to be able to handle
  the megamorphic load case in hydrogen. A simple approach is to
  wrap the probe activity in a hydrogen instruction.

  The instruction is novel in that it always tail-calls away.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/564683002

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23889 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r23854 (3870059)

Original commit message:
Added CallInterfaceDescriptors to all code stubs. A handful
of code stubs are too complex to be described this way, and
they are encoded with the macro
DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR().

Along the way:
* allowed inheritance of CallInterfaceDescriptors.
* Defined static Register methods for some of the new
  CallInterfaceDescriptors. We could go a lot further here, but
  it doesn't have to be done immediately.
* Added Representation arrays to some CallInterfaceDescriptors,
  especially where future hydrogen versions of the stubs could
  benefit from this knowledge.

BUG=
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/562153002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

of code stubs are too complex to be described this way, and
they are encoded with the macro
DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR().

Along the way:
* allowed inheritance of CallInterfaceDescriptors.
* Defined static Register methods for some of the new
  CallInterfaceDescriptors. We could go a lot further here, but
  it doesn't have to be done immediately.
* Added Representation arrays to some CallInterfaceDescriptors,
  especially where future hydrogen versions of the stubs could
  benefit from this knowledge.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/551043005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23854 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

MIPS: To aid vector-based load ic work, we need to be able to handle the megamorphic load case in hydrogen.

Port r23772 (d6d07c5)

Original commit message:
Encapsulate megamorphic load/tail-call in hydrogen.

A simple approach is to wrap the probe activity in a hydrogen instruction.

The instruction is novel in that it always tail-calls away.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/546733003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23781 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

the megamorphic load case in hydrogen. A simple approach is to
wrap the probe activity in a hydrogen instruction.

The instruction is novel in that it always tail-calls away.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/535873002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23772 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/553843002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23767 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/545843002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23717 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/542613003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23716 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r23655.

original commit message:

  Clean up code stubs and ensure distinct major keys.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/543013002

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23712 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r23639

original commit message:

  Make concrete classes for individual call descriptors. The
  ic-convention classes that hold register specifications are
  merged into these new call descriptor classes, which should
  represent a final home for that information.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/544943002

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23708 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/541723002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23696 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/539083002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23695 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/540903002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23692 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r23655 (6327324d)

BUG=
R=machenbach@chromium.org, paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/541513002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23674 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r23639 (e5a2758)

Original commit message:
The ic-convention classes that hold register specifications are merged into these new call descriptor classes, which should represent a final home for that information.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/538573002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23666 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/536943002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23661 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/530343005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23655 ce2b1a6d-e550-0410-aec6-3dcde31c8c00