Better support for 'polymorphic' JS and external arrays

Allow  keyed store/load stubs to switch between external array and fast JS arrays without forcing a state transition to the generic stub.

There CL consists of two pieces of functionality. First, code stubs for fast element arrays don't immediately transition to the MEGAMORPHIC state when there's a map mismatch. Second, two ICs are cached per map for fast elements, the MONOMORPHIC version, and a new MEGAMORPHIC version that handles two or more different maps and dispatches to shared stubs to perform the array operation.

Review URL: http://codereview.chromium.org/7036016

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TBR=danno@chromium.org

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Allow  keyed store/load stubs to switch between external array and fast JS arrays without forcing a state transition to the generic stub.

There CL consists of two pieces of functionality. First, code stubs for fast element arrays don't immediately transition to the MEGAMORPHIC state when there's a map mismatch. Second, two ICs are cached per map for fast elements, the MONOMORPHIC version, and a new MEGAMORPHIC version that handles two or more different maps. Currently, the only array types supported by the MEGAMORPHIC stub are fast elements for objects and JSArrays.

BUG=
TEST=

Review URL: http://codereview.chromium.org/6894003

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1) Add new type JSProxy for representing proxy objects.
   Currently devoid of functionality, i.e., all properties are undefined.

2) Some rudimentary global $Proxy functions to create proxies.

Next step: Hook up getProperty and getOwnProperty handlers. Will probably
require introducing a new LookupResult type, which is a mixture of
INTERCEPTOR (handles any property) and CALLBACK (calls back to JS).
Can we unify this somehow?

TODO: Should probably rename existing Proxy type to something like
"Foreign", to avoid confusion.

Review URL: http://codereview.chromium.org/6932068

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Review URL: http://codereview.chromium.org/6997015

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header which uses BASE_EMBEDDED and/or AllStatic. Note that still only
45 out of 135 headers in src/ can be used stand-alone, but at least
this is a little bit more than before...
Review URL: http://codereview.chromium.org/6931031

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BUG=None
TEST=mjsunit/external-arrays.js; updated cctest; existing unit tests

Review URL: http://codereview.chromium.org/6879009

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Review URL: http://codereview.chromium.org/6670115

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By default use specialized static visitor and fallback to more generic one when one of the isolates with enabled logging/profiling hits GC.

Review URL: http://codereview.chromium.org/6777011

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Review URL: http://codereview.chromium.org/6685088

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* Reverse order of arguments in-object fields for length and callee.
* Introduce arguments ThrowTypeError functions (caller/callee).
* Create strict mode arguments boilerplate object.
* Strict mode "new arguments object" stub.
* Runtime arguments object allocation.
* Update es5conform test expectations.

Review URL: http://codereview.chromium.org/6698015/

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objects retained by object groups and global handles.

This information is then used during heap snapshot generation
to provide a more complete memory picture.

This patch will be needed to fix https://bugs.webkit.org/show_bug.cgi?id=53659.

Review URL: http://codereview.chromium.org/6626043

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Worth mentioning:
- Specialized versions of pixel array and store/loads inside the generic stubs have been removed, since to have parity for all external arrays, 8 different versions would have to be inlined/checked.
- There's a new constant in v8.h for external arrays with pixel array elements.

Review URL: http://codereview.chromium.org/6546036

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Non-moveable code-stube are allocated in large object space. They are only required on ARM where the different C-entry stubs are required to never move.

This gets rid of pre-computing these stubs and hope that they never move. Also for crankshaft the C-entry stub which saved doubles is not generated in the snapshot so it ends up being generated at runtime and potentially move.
Review URL: http://codereview.chromium.org/6626072

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Move the value of the root-array register to offset 128 from the start of
the root array. This allows indices 16..31 to be reached using only an
8-bit displacement, saving three bytes per access.

Review URL: http://codereview.chromium.org/6594115

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This is so that it can be reused by LOL code later.

Patch by Mark Lam from Hewlett-Packard Development Company, LP

Review URL: http://codereview.chromium.org/6541044


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in order to not be vulnerable to overflow issues.

Patch by Mark Lam of Hewlett-Packard Development Company, LP

Review URL: http://codereview.chromium.org/5966001

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Review URL: http://codereview.chromium.org/6478027

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Direct call api functions (arm implementation)

See: http://codereview.chromium.org/6170001/

Review URL: http://codereview.chromium.org/6286078

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Review URL: http://codereview.chromium.org/6287030

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an error message that needs to be generated and reported. This change
hides all of the error information from JavaScript code so user
callbacks cannot get hold of it.

Review URL: http://codereview.chromium.org/6368051

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conversions for external array types, which implement the Typed Array
spec. (Revision of http://codereview.chromium.org/6315004 .)

Prefer SSE2 code path on x86 processors. Non-SSE2 processors now make
a slow runtime call for float-to-int conversions. Use SSE3 for 32-bit
signed and unsigned int array types where possible.

The movement of code from ic-arm.cc to stub-cache-arm.cc caused the
VFP3 code path to be tested for the first time. Fixed bugs in the
register usage and in the constant value stored into integer arrays
for NaN and +/-Infinity.

Added new truncation test to test-api.cc. Storage of NaN and +/-Inf
was already covered. Ran unit tests on x86, x64 and ARM simulator.
Tested ia32 and x64 code in Chromium on Mac and Linux respectively
with Typed Array unit tests and WebGL content.

BUG=http://code.google.com/p/chromium/issues/detail?id=50972
TEST=test-api/ExternalArrays

Review URL: http://codereview.chromium.org/6303012

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- var eval | arguments
- catch (eval | arguments)
- 'with' is disabled
- function can't be named eval or arguments

Add FLAG_strict_mode

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version did not work.

TBR=kbr@chromium.org
Review URL: http://codereview.chromium.org/6295013

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conversions for external array types, which implement the Typed Array
spec. The new code paths are for SSE3 and SSE2 capable processors.
The code for non-SSE2 processors is unchanged for now. The ARM port
appears to already be correct.

Moved the generation of the external array load and store intrinsics
to the stub cache (on all platforms) so that they are generated at run
time and can take advantage of CPU features.

This functionality is covered by the array-unit-tests.html test in the
WebGL conformance test suite:
http://khronos.org/webgl/wiki/Testing/Conformance
https://cvs.khronos.org/svn/repos/registry/trunk/public/webgl/sdk/tests/conformance/array-unit-tests.html

Manually verified all of the SSE3/SSE2/non-SSE2 code paths by enabling
each in turn. Tested in Chromium on 32-bit Mac OS X and 64-bit Linux.

BUG=http://code.google.com/p/chromium/issues/detail?id=50972
TEST=none (see above)

Review URL: http://codereview.chromium.org/6315004

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- var eval | arguments
- catch (eval | arguments)
- 'with' is disabled
- function can't be named eval or arguments
- function parameter name cannot be eval or arguments
- no duplicate parameter names allowed

Add FLAG_strict_mode

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to add -fno-strict-aliasing.
Review URL: http://codereview.chromium.org/6123007

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Before we used the hole value for this purpose, but this does not work once we
start using the hole value for other purposes in the optimizing compiler.

Review URL: http://codereview.chromium.org/6116001

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Make preparser keep its symbol text itself instead of relying on the scanner.

Review URL: http://codereview.chromium.org/6075005

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Review URL: http://codereview.chromium.org/6021004

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The assumption is that most utf8 strings allocated are actually ascii
and that if they are not we will encounter a non-ascii char pretty
quickly.

Review URL: http://codereview.chromium.org/6072004

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I'm using it when creating heap snapshots. I decided that it will
be more convenient to have it as a separate piece of code, instead
of embedding into the snapshot generator.

Review URL: http://codereview.chromium.org/6014004

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Add untagged double versions of Math.sin and Math.cos.  Merge classes TranscendentalCacheStub and TranscendentalCacheSSE2Stub.
Review URL: http://codereview.chromium.org/5996002

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Reapply change 5989, adding untagged double calls to Math.pow, with problem in generated code for TranscendentalCacheSSE2Stub (unguarded SSE 4.1 code) fixed.
Review URL: http://codereview.chromium.org/5726008

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Review URL: http://codereview.chromium.org/5804003

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Review URL: http://codereview.chromium.org/5741003

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This is neutral on in-browser SunSpider, but beneficial on other
things, and is likely to lower memory use by collecting earlier.
Review URL: http://codereview.chromium.org/5753003

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