Setting up the stage for heuristics that preprocess live ranges before register allocation, and are independent of register allocation - e.g. the deferred blocks heuristic, or the split at call sites heuristic.

Added a separate flag for this, since we intend to enable it for the linear allocator as well. Currently, the option is "on" for greedy, as a point in time to enable its testing (through the greedy allocator bots).

BUG=

Review URL: https://codereview.chromium.org/1256313003

Cr-Commit-Position: refs/heads/master@{#30005}

Change IS_SIMD_OBJECT to IS_SIMD_VALUE, and IsSimdObject to IsSimdValue.

R=rossberg
LOG=N
BUG=v8:4124

Review URL: https://codereview.chromium.org/1253103006

Cr-Commit-Position: refs/heads/master@{#30004}

The race occurred when Workers were used. Since Workers call
Shell::ExecuteString from a different thread, TSAN (correctly) flags
this as a racy write. Solution would be to either synchronize the writes,
or to 'lift' the write higher up in the call stack and only write the flag
from the main thread. This implements this latter solution.

These methods call Shell::ExecuteString, but do *not* set script_executed:
- ExecuteInThread: Can only occur is JS has already been executed.
- Shell::Load: Callback for JS; so JS has already been executed when
               we get there.
- Shell::RunShell: Interactive shell. We no longer need script_executed once
                   we're here.

BUG=v8:4330
LOG=N

Review URL: https://codereview.chromium.org/1258303004

Cr-Commit-Position: refs/heads/master@{#30003}

Store arity in FormalParameters; store name (instead of var) and is_rest flag in individual parameters. Ensure that the arity is always maintained consistently.

This is preparation for more parameter destructuring adjustments. In particular, a follow-up CL will separate parameter recording from declaring the variables.

R=adamk@chromium.org, littledan@chromium.org
BUG=v8:811
LOG=N

Review URL: https://codereview.chromium.org/1259013003

Cr-Commit-Position: refs/heads/master@{#30002}

TBR=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1263043004

Cr-Commit-Position: refs/heads/master@{#30001}

Revert of Remove serializer-specific hash table size heuristic. (patchset #1 id:1 of https://codereview.chromium.org/1265983006/ )

Reason for revert:
https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20gc%20stress/builds/3088/steps/Mjsunit/logs/load-proxy

Original issue's description:
> Remove serializer-specific hash table size heuristic.
>
> The heuristic can cause weird behavior when bootstrapping.
> The memory savings is not worth this hassle.
>
> Committed: https://crrev.com/a246e296c6366dcd0a2d8aa0df973d57093178f6
> Cr-Commit-Position: refs/heads/master@{#29992}

TBR=ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1257873006

Cr-Commit-Position: refs/heads/master@{#30000}

R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1269183002

Cr-Commit-Position: refs/heads/master@{#29999}

They need to be properly recorded in the scope's temps set, otherwise allocation doesn't know about them and can break. (Not observable right now, but necessary for follow-up changes to parameter destructuring.)

Also, print temporary variables in a useful manner.

R=adamk@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1263563002

Cr-Commit-Position: refs/heads/master@{#29998}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1265243003

Cr-Commit-Position: refs/heads/master@{#29997}

BUG=chromium:515873
LOG=NO

Review URL: https://codereview.chromium.org/1263373002

Cr-Commit-Position: refs/heads/master@{#29996}

This is a pure refactor and does not change functionality.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/1264993002

Cr-Commit-Position: refs/heads/master@{#29995}

BUG=chromium:515873
LOG=NO

Review URL: https://codereview.chromium.org/1257833005

Cr-Commit-Position: refs/heads/master@{#29994}

Port 7b9670b6

Only fails in debug builds.

TEST=mjsunit/harmony/simd
BUG=

Review URL: https://codereview.chromium.org/1264103005

Cr-Commit-Position: refs/heads/master@{#29993}

The heuristic can cause weird behavior when bootstrapping.
The memory savings is not worth this hassle.

Review URL: https://codereview.chromium.org/1265983006

Cr-Commit-Position: refs/heads/master@{#29992}

That makes going to the page safe. Addresses can be in arbitrary locations of an object, e.g. in a large object but not on the first 1M page.
BUG=

Review URL: https://codereview.chromium.org/1256203004

Cr-Commit-Position: refs/heads/master@{#29991}

Rolling v8/buildtools to 565d04e8741429fb1b4f26d102f2c6c3b849edeb

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1267173003

Cr-Commit-Position: refs/heads/master@{#29990}

The recursion between AllocateRaw* and SlowAllocateRaw makes incremental
stepping very complicated. This patch removes the recursion. Follow-on
patches will improve accounting of allocations done by incremental mark.

See: https://codereview.chromium.org/1252053003/#msg5

BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1265443003

Cr-Commit-Position: refs/heads/master@{#29989}

Change minimum BytecodeArray frame size to zero now return value is in
the accumulator.

Fix inconsistent checks in bytecode-array-builder.cc.

Simplify bytecode disassembly by adding Bytecodes::Decode to
disassemble one bytecode and operands.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1259193004

Cr-Commit-Position: refs/heads/master@{#29988}

BUG=

Review URL: https://codereview.chromium.org/1261373006

Cr-Commit-Position: refs/heads/master@{#29987}

BUG=

Review URL: https://codereview.chromium.org/1270873002

Cr-Commit-Position: refs/heads/master@{#29986}

There is only one use case for it: String.prototype.search converts a
string argument into a RegExp. The cache is used to avoid repeating that
conversion. However, this does not make the added complexity worthwhile.

Review URL: https://codereview.chromium.org/1267493006

Cr-Commit-Position: refs/heads/master@{#29985}

R=danno@chromium.org, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com

BUG=

Review URL: https://codereview.chromium.org/1252913007

Cr-Commit-Position: refs/heads/master@{#29984}

High promotion mode limits new space size in the case where many objects (high
rate) are promoted.  The result is frequent scavenger runs with low pause times. The
approach conflicts with pretenuring which requires a larger new space size to
collect enough feedback to be usable.

Ultimately the goal is to have pretenuring catch allocation sites that have high
promotion rates.

Revert "Bring back high promotion mode to shrink young generation size when scavenging latency is high."

This reverts commit 37be1d5e.

Revert "GC. Delay/avoid entering high promotion mode"

This reverts commit a5221d07.

BUG=chromium:499507,chromium:506910
LOG=n

Review URL: https://codereview.chromium.org/1247723003

Cr-Commit-Position: refs/heads/master@{#29983}

BUG=chromium:514081
R=jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1264723002

Cr-Commit-Position: refs/heads/master@{#29982}

As demanded by the spec.

BUG=chromium:516251
R=jkummerow@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1261453004

Cr-Commit-Position: refs/heads/master@{#29981}

Rename method EmitIsSpecObject -> EmitIsSimdObject.

LOG=N
BUG=v8:4124

Review URL: https://codereview.chromium.org/1263473008

Cr-Commit-Position: refs/heads/master@{#29980}

BUG=chromium:454297
LOG=n

Review URL: https://codereview.chromium.org/1268663004

Cr-Commit-Position: refs/heads/master@{#29979}

NOPRESUBMIT=true
R=titzer@chromium.org, michael_dawson@ca.ibm.com, jyan@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1271583002

Cr-Commit-Position: refs/heads/master@{#29978}

R=mstarzinger@chromium.org
BUG=
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/1263363002

Cr-Commit-Position: refs/heads/master@{#29977}

Reland of land concurrent sweeping of code space. (patchset #1 id:1 of https://codereview.chromium.org/1263343002/)

Reason for revert:
Bogus revert.

Original issue's description:
> Revert of Reland concurrent sweeping of code space. (patchset #6 id:100001 of https://codereview.chromium.org/1242333002/)
>
> Reason for revert:
> Reverted because 507840 came back on recent Chromecrash. Should not have committed this Cl.
>
> Original issue's description:
> > Reland concurrent sweeping of code space.
> >
> > BUG=
> >
> > Committed: https://crrev.com/8516dccf6a561020441773c93c564dd4aa6ee59e
> > Cr-Commit-Position: refs/heads/master@{#29967}
>
> TBR=jochen@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/5c6e7d00438cc82a5584e3178d7dadf36e4a34f8
> Cr-Commit-Position: refs/heads/master@{#29975}

TBR=jochen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1271773002

Cr-Commit-Position: refs/heads/master@{#29976}

Revert of Reland concurrent sweeping of code space. (patchset #6 id:100001 of https://codereview.chromium.org/1242333002/)

Reason for revert:
Reverted because 507840 came back on recent Chromecrash. Should not have committed this Cl.

Original issue's description:
> Reland concurrent sweeping of code space.
>
> BUG=
>
> Committed: https://crrev.com/8516dccf6a561020441773c93c564dd4aa6ee59e
> Cr-Commit-Position: refs/heads/master@{#29967}

TBR=jochen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1263343002

Cr-Commit-Position: refs/heads/master@{#29975}

Adds Int32x4, Bool32x4, Int16x8, Bool16x8, Int8x16, Bool8x16.
Adds Simd128Value base heap object class.
Changes heap/factory construction pattern to use arrays.
Adds replaceLane functions to facilitate testing.

NOPRESUBMIT=true
(presubmit checks erroneously interpret array declaration in macro definition as variable size array.)

LOG=Y
BUG=v8:4124

Review URL: https://codereview.chromium.org/1250733005

Cr-Commit-Position: refs/heads/master@{#29974}

The calculation now takes into account the size of the arguments object
if it is present in the optimized frame.

(Yang, many thanks for the awesome repro!)

BUG=chromium:514362
LOG=N
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1264483008

Cr-Commit-Position: refs/heads/master@{#29973}

BUG=v8:4141
LOG=n
NOTRY=true
TBR=yangguo@chromium.org, vogelheim@chromium.org

Review URL: https://codereview.chromium.org/1263033005

Cr-Commit-Position: refs/heads/master@{#29972}

This fixes a bug introduced by r28826 (Unify decoding of deoptimization
translations, https://codereview.chromium.org/1136223004), where we
started leaking arguments marker sentinel to the debugger, which would
then cause crashes. This change replaces the sentinel with the undefined
value in the debugger-inspectable frame.

BUG=chromium:514362
LOG=n
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1263333002

Cr-Commit-Position: refs/heads/master@{#29971}

The BytecodeArrayBuilder has responsibility for emitting the BytecodeArray. It will be used by the AST walker.

Bytecode now uses an accumulator plus registers rather being pure register based.

Update BytecodeArray::Disassemble to print operand information.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1266713004

Cr-Commit-Position: refs/heads/master@{#29970}

No-snap builds are still failing.

NOTREECHECKS=true
NOTRY=true
TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1260283006

Cr-Commit-Position: refs/heads/master@{#29969}

Original CL: https://crrev.com/5aaceefd9a84327ce6afeaea16557449bf83ce57

BUG=chromium:515721
LOG=NO

Review URL: https://codereview.chromium.org/1264063003

Cr-Commit-Position: refs/heads/master@{#29968}

BUG=

Review URL: https://codereview.chromium.org/1242333002

Cr-Commit-Position: refs/heads/master@{#29967}

Otherwise we may choose sloppy const or strict const depending on
whether the function is parsed the first time.

R=mvstanton@chromium.org
BUG=v8:4336
LOG=N

Review URL: https://codereview.chromium.org/1260053004

Cr-Commit-Position: refs/heads/master@{#29966}