When the range ends just at the gap of a non-deferred block, the last
instruction the range covers is in the predecessor. If that predecessor is
a deferred block, before this CL, we would splinter the remainder of the
range all the way to the end. That leads to inefficient codegen, because
we still want a split inside the deferred block.

Also, opportunistically added a trace before we splinter, for better
diagnostics.

BUG= chromium:546416
LOG=N

Review URL: https://codereview.chromium.org/1412123009

Cr-Commit-Position: refs/heads/master@{#31529}

Review URL: https://codereview.chromium.org/1413663007

Cr-Commit-Position: refs/heads/master@{#31528}

Setting the prototype to whatever it currently is must succeed even if
the object is not extensible.

R=verwaest@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1423603002

Cr-Commit-Position: refs/heads/master@{#31527}

Fix aborting compaction for pages by doing two separate passes, one that scans
all live objects, and one that later on sweeps the page.

Detailed description see bug report.

BUG=chromium:539356,chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1413763011

Cr-Commit-Position: refs/heads/master@{#31526}

This patch switches sloppy-mode code from legacy const semantics
to ES2015 semantics. It is unknown how much of the web will be
broken by this; likely the patch will have to be reverted before
a branch happens.

BUG=v8:3739
LOG=Y
R=rossberg,adamk

Review URL: https://codereview.chromium.org/1420223003

Cr-Commit-Position: refs/heads/master@{#31525}

We don't need to have an (untested) fallback for the case that a
prototype map is not stable when specializing a named property,
because prototype maps are always stable (which is now guarded
by a DCHECK in CompilationDependencies).  Less (dead) code is
better code.

R=verwaest@chromium.org
BUG=v8:4470
LOG=n

Review URL: https://codereview.chromium.org/1417973006

Cr-Commit-Position: refs/heads/master@{#31524}

BUG=

Review URL: https://codereview.chromium.org/1420253002

Cr-Commit-Position: refs/heads/master@{#31523}

Review URL: https://codereview.chromium.org/1412823003

Cr-Commit-Position: refs/heads/master@{#31522}

R=rossberg
BUG=

Review URL: https://codereview.chromium.org/1425433002

Cr-Commit-Position: refs/heads/master@{#31521}

R=rossberg
BUG=

Review URL: https://codereview.chromium.org/1423753002

Cr-Commit-Position: refs/heads/master@{#31520}

BUG=none
LOG=y
R=verwaest@chromium.org,bmeurer@chromium.org,rossberg@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng

Review URL: https://codereview.chromium.org/1423723002

Cr-Commit-Position: refs/heads/master@{#31519}

    port 7557dc5a (r31312).

    original commit message:
    This change add a new bytecode for operator new and implements it using
    the Construct() builtin.

BUG=

Review URL: https://codereview.chromium.org/1423733002

Cr-Commit-Position: refs/heads/master@{#31518}

R=verwaest@chromium.org
BUG=v8:4470
LOG=n

Review URL: https://codereview.chromium.org/1407233006

Cr-Commit-Position: refs/heads/master@{#31517}

    port b3334087 (r31313).

    original commit message:

BUG=

Review URL: https://codereview.chromium.org/1412893006

Cr-Commit-Position: refs/heads/master@{#31516}

Review URL: https://codereview.chromium.org/1412123006

Cr-Commit-Position: refs/heads/master@{#31515}

Reland of [turbofan] Fix and enable property stores. (patchset #1 id:1 of https://codereview.chromium.org/1414743005/ )

Reason for revert:
It is fixed.

Original issue's description:
> Revert of [turbofan] Fix and enable property stores. (patchset #2 id:20001 of https://codereview.chromium.org/1424523002/ )
>
> Reason for revert:
> [Sheriff] Breaks benchmarks:
> http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug%20-%20avx2/builds/3164
>
> Original issue's description:
> > [turbofan] Fix and enable property stores.
> >
> > Fix lookup for storing to properties, and also make sure we don't embed
> > deprecated map (using Map::TryUpdate).
> >
> > R=jarin@chromium.org
> > BUG=v8:4470
> > LOG=n
> >
> > Committed: https://crrev.com/70158828b3db8e582344272c6c11a957f4d8b2c8
> > Cr-Commit-Position: refs/heads/master@{#31509}
>
> TBR=jarin@chromium.org,bmeurer@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:4470
>
> Committed: https://crrev.com/50e5a7275f2bc93a8ae731acda0f7ac6e5e97c3c
> Cr-Commit-Position: refs/heads/master@{#31513}

TBR=jarin@chromium.org,machenbach@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4470

Review URL: https://codereview.chromium.org/1421573003

Cr-Commit-Position: refs/heads/master@{#31514}

Revert of [turbofan] Fix and enable property stores. (patchset #2 id:20001 of https://codereview.chromium.org/1424523002/ )

Reason for revert:
[Sheriff] Breaks benchmarks:
http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug%20-%20avx2/builds/3164

Original issue's description:
> [turbofan] Fix and enable property stores.
>
> Fix lookup for storing to properties, and also make sure we don't embed
> deprecated map (using Map::TryUpdate).
>
> R=jarin@chromium.org
> BUG=v8:4470
> LOG=n
>
> Committed: https://crrev.com/70158828b3db8e582344272c6c11a957f4d8b2c8
> Cr-Commit-Position: refs/heads/master@{#31509}

TBR=jarin@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4470

Review URL: https://codereview.chromium.org/1414743005

Cr-Commit-Position: refs/heads/master@{#31513}

TBR=jarin@chromium.org
BUG=v8:4470
LOG=n

Review URL: https://codereview.chromium.org/1424533002 .

Cr-Commit-Position: refs/heads/master@{#31512}

Review URL: https://codereview.chromium.org/1415823003

Cr-Commit-Position: refs/heads/master@{#31511}

This removes the requirement for handles as arguments, but also removes
concurrency support, which is not being used at the moment.

Supporting concurrency could be done by introducing a sibling class to
IdentityMap that includes RelocationLock on method calls.

R=bmeurer@chromium.org, ulan@chromium.org

Review URL: https://codereview.chromium.org/1419563004

Cr-Commit-Position: refs/heads/master@{#31510}

Fix lookup for storing to properties, and also make sure we don't embed
deprecated map (using Map::TryUpdate).

R=jarin@chromium.org
BUG=v8:4470
LOG=n

Review URL: https://codereview.chromium.org/1424523002

Cr-Commit-Position: refs/heads/master@{#31509}

BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1409363003

Cr-Commit-Position: refs/heads/master@{#31508}

R=rossberg
BUG=

Review URL: https://codereview.chromium.org/1415283003

Cr-Commit-Position: refs/heads/master@{#31507}

    port 24622f5f (r31257).

    original commit message:

BUG=

Review URL: https://codereview.chromium.org/1415033004

Cr-Commit-Position: refs/heads/master@{#31506}

    port f2f46aff (r31242).

    original commit message:
    The lack of a vector slot for the keyed store operation in filling in
    non-constant array literal properties led to undesirable contortions in
    compilers downwind of full-codegen. The use of a single slot to initialize all
    the array elements is sufficient.

BUG=

Review URL: https://codereview.chromium.org/1422443004

Cr-Commit-Position: refs/heads/master@{#31505}

    port 2d4aeaad (r31204).

    original commit message:
    The stack manipulation was expensive. Two virtual registers are better.

BUG=

Review URL: https://codereview.chromium.org/1410573003

Cr-Commit-Position: refs/heads/master@{#31504}

    port 9c8262f1 (r31120).

    original commit message:
    When calling into C++ builtins, we need to make sure that the argument
    count register contains the correct number of arguments, otherwise the
    CEntryStub will not be able to leave the stack in the correct state.

BUG=

Review URL: https://codereview.chromium.org/1418533009

Cr-Commit-Position: refs/heads/master@{#31503}

    port 75f6ad74 (r31089).

    original commit message:
    Adds support for calling runtime functions from the interpreter. Adds the
    CallRuntime bytecode which takes a Runtime::FunctionId of the function to call
    and the arguments in sequential registers. Adds a InterpreterCEntry builtin
    to enable the interpreter to enter C++ code based on the functionId.

    Also renames Builtin::PushArgsAndCall to Builtin::InterpreterPushArgsAndCall
    and groups all the interpreter builtins together.

    BUG=v8:4280
    LOG=N

Review URL: https://codereview.chromium.org/1418213002

Cr-Commit-Position: refs/heads/master@{#31502}

This is in preparation of implementing Reflect.set.

R=rossberg
BUG=

Review URL: https://codereview.chromium.org/1394983005

Cr-Commit-Position: refs/heads/master@{#31501}

BUG=

Review URL: https://codereview.chromium.org/1419143003

Cr-Commit-Position: refs/heads/master@{#31500}

This is in preparation of using it elsewhere.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1408163003

Cr-Commit-Position: refs/heads/master@{#31499}

BUG=v8:4406
LOG=N

Review URL: https://codereview.chromium.org/1416053010

Cr-Commit-Position: refs/heads/master@{#31498}

BUG=

Review URL: https://codereview.chromium.org/1418693005

Cr-Commit-Position: refs/heads/master@{#31497}

This patch only treats non-private symbols as valid feedback, thus
avoiding the need to switch to Oddballs for the feedback sentinels
and avoiding breaking the use of private own symbols.

Crankshaft will also optimize these symbol loads into a named load,
just as it does for string keyed loads with type feedback.

BUG=

Review URL: https://codereview.chromium.org/1415333003

Cr-Commit-Position: refs/heads/master@{#31496}

BUG=none
LOG=n
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/1410883006

Cr-Commit-Position: refs/heads/master@{#31495}

    port 5cf1c0bc (r31087).

    original commit message:
    Previous to this patch, both the lithium and TurboFan register
    allocators tracked allocated registers by "indices", rather than
    the register codes used elsewhere in the runtime. This patch
    ensures that codes are used everywhere, and in the process cleans
    up a bunch of redundant code and adds more structure to how the
    set of allocatable registers is defined.

    Some highlights of changes:

    * TurboFan's RegisterConfiguration class moved to V8's top level
      so that it can be shared with Crankshaft.
    * Various "ToAllocationIndex" and related methods removed.
    * Code that can be easily shared between Register classes on
      different platforms is now shared.
    * The list of allocatable registers on each platform is declared
      as a list rather than implicitly via the register index <->
      code mapping.

    additional comment:
    This patch must be work with CL https://codereview.chromium.org/1405673003/
    and CL https://codereview.chromium.org/1413343002/
    which provide the needed register allocation common code change in
    v8 for this CL

BUG=

Review URL: https://codereview.chromium.org/1410393004

Cr-Commit-Position: refs/heads/master@{#31494}

BUG=v8:4406
LOG=N

Review URL: https://codereview.chromium.org/1420653005

Cr-Commit-Position: refs/heads/master@{#31493}

   Currently X87 turbofan backend use only one double register. But crankshaft needs to use more than 1
   double register. The reason is that the X87 register is stack-based and the register allocator use
   the same algorithm for all registers. So the backend of X87 needs to maintain the X87 stack status
   between basic blocks during code generation. But for Turbofan backend, it can only handle discrete
   platform-related LIRs. It's difficult to maintain the x87 stack status during different basic blocks.
   So we use the register configuration selection mechanism to return different register configuration
   for X87 turbofan and crankshaft seperately.

   This CL is a follow-up of https://codereview.chromium.org/1405673003/.

BUG=

Review URL: https://codereview.chromium.org/1413343002

Cr-Commit-Position: refs/heads/master@{#31492}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1409933003

Cr-Commit-Position: refs/heads/master@{#31491}

BUG=v8:4406
LOG=N

Review URL: https://codereview.chromium.org/1420543003

Cr-Commit-Position: refs/heads/master@{#31490}