Improve Array.shift() performance for small arrays.

TEST=mjsunit/array-shift,mjsunit/array-shift2,mjsunit/array-shift3
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/279743002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21203 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Simplify ConfigureHeap and change --max_new_space_size to --max_semi_space_size.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/271843005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21204 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Reland "Removed default Isolate."

Changes compared to original CL: Until the Serializer/Isolate chaos is
cleaned up, we can't initalize/dispose cctests in a tidy way, see
cctest.cc.

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

Review URL: https://codereview.chromium.org/267383002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21205 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use ReplaceCode instead of set_code in debug.cc.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/274043002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21206 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Cleaned up the weak lists hanging off the heap a bit.

 * Route all access to the 3 weak lists through getters/setters.

 * Removed superfluous visiting already done by ProcessWeakReferences.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/273653006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21207 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Clean up stack guard interrupts.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/264233005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21208 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Make new space iterable for --log-gc and --heap-stats options

R=hpayer@chromium.org
BUG=370827
TEST=test/mjsunit/regress/regress-370827.js
LOG=N

Review URL: https://codereview.chromium.org/272503005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21209 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Clean up Debugger::NotifyMessageHandler.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/276433004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21210 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Sync change log and version file with trunk.

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/271583004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21213 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fixed d8 shutdown.

It is crucial that the Isolate is cleanly disposed, otherwise the
optimizing compiler thread happily continues to run.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/274093002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21214 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use HType::NonPrimitive() for unclassified HeapObjects (i.e. Maps).

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/279813002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21215 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Eliminate further write barriers for old space allocations.

Storing a map or an immortal immovable object to old space
allocations requires no write barriers if the object is the
new space dominator.

R=hpayer@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/271103002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21216 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Prevent calls to ReturnValue::Set with pointer-valued types.

Currently, this code will compile:
  SomePointer* p = ...;
  ReturnValue r = ...;
  r.Set(p);

What happens is that ReturnValue::Set has no pointer-ish overloads, but
a bool one, and hence C++ will convert the pointer to a bool and use
the Set(bool) overload. In other words, the example above is equivalent
to: r.Set(p ? true : false); Which probably isn't what the author had
in mind. This change adds a Set(void*) overload whose body forces a
compile error, to prevent this from happening inadvertently. The only
use of this indeed turned out to be an error.

(Wait for issue 364025 before submitting.)

BUG=
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/240013004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21217 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix new space array check limit.

Also inline BuildNewSpaceArrayCheck() into its caller, because
the name BuildNewSpaceArrayCheck was confusing anyway, since
it has nothing do with new space actually.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/275453004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21218 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert of Prevent calls to ReturnValue::Set with pointer-valued types. (https://codereview.chromium.org/240013004/)

Reason for revert:
Looks like this broke the "V8 Linux64 ASAN" build.

Original issue's description:
> Prevent calls to ReturnValue::Set with pointer-valued types.
>
> Currently, this code will compile:
>   SomePointer* p = ...;
>   ReturnValue r = ...;
>   r.Set(p);
>
> What happens is that ReturnValue::Set has no pointer-ish overloads, but
> a bool one, and hence C++ will convert the pointer to a bool and use
> the Set(bool) overload. In other words, the example above is equivalent
> to: r.Set(p ? true : false); Which probably isn't what the author had
> in mind. This change adds a Set(void*) overload whose body forces a
> compile error, to prevent this from happening inadvertently. The only
> use of this indeed turned out to be an error.
>
> (Said error was fixed/removed in crrev.com/267393002.)
>
> BUG=
> R=dcarney@chromium.org
>
> Committed: https://code.google.com/p/v8/source/detail?r=21217

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/271113002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21219 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add flag to set minimum semi-space size.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/279513003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21220 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'