A potential issue with this change is creating lots of maps when
objects flip between fast/slow elements modes.  We could add special
transitions to avoid this.  Yet testing this on our benchmarks, gmail,
and wave seems to indicate that this is not a real problem.

Review URL: http://codereview.chromium.org/2870018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4941 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The regression made 2 tests fail on ia32 with --always-full-compiler.

Review URL: http://codereview.chromium.org/2862028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4940 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2821016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4939 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Stable high survival rates of young objects both during partial and
full collection indicate that mutator is either building or modifying
a structure with a long lifetime.

In this case we aggressively raise old generation memory limits to
postpone subsequent mark-sweep collection and trade memory space
for the mutation speed.

Review URL: http://codereview.chromium.org/2809032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4938 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2818028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4937 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2848023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4936 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4935 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2815028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4934 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Tested with kSamplingIntervalMs values 2 and 4.

Review URL: http://codereview.chromium.org/2811021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4933 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2828004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4932 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2827022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4930 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

result of 1 << x to be miscalculated for some inputs.
Review URL: http://codereview.chromium.org/2848021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4929 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Make push/pop use emit_optional_rex32.
Fix bug in disassembler (swapped name of comisd/ucomisd).
Use fstp in FCmp macro.

Review URL: http://codereview.chromium.org/2818026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4928 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2850018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4927 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Similar or duplicate checks are scattered around the code before doing the dictionary load. 
Also the entire branch in GenerateCallNormal that handles global/builtin receiver is 
guaranteed to bail out from GenerateDictionaryLoad, so there is no point in generating it at all.

The purpose of the patch is:
- making C++ code more compact and transparent,
- not generating dead code. 

There is a tiny performance gain. The patch is ia32 only for now.

Please tell me if I am missing anything.


Review URL: http://codereview.chromium.org/2801007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4926 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2815025

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4923 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

fixed in revision 4921).

This also enables codeflushing by default.

Review URL: http://codereview.chromium.org/2829020

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4922 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

When flushing code we can potentially flush code with a scopeinfo that
we later need to resolve variables. This makes an explicit check that
there are heap allocated locals in the scopeinfo.


Review URL: http://codereview.chromium.org/2836021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4921 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Some ARM chips load instructions 8 byte at a time.

Review URL: http://codereview.chromium.org/2809029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4920 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

More information is at http://code.google.com/p/v8/issues/detail?id=742

Review URL: http://codereview.chromium.org/2835014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4918 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

to get rid of global object loaded from a snapshot. This
eliminates the "double global object" issue. Thanks to Mads
for suggesting this!

Review URL: http://codereview.chromium.org/2865013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4917 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2832018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4916 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2818023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4915 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Align deferred code blocks to 16-byte address boundaries.

Review URL: http://codereview.chromium.org/2855018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Zhang Kun.  For now we only emit movw and movt in places where no
relocation is needed.  Small performance boost (around 0.5%).
Also adds support for turning ALU operations (eor etc.) with
large immediates into mvn or movw followed by a register-based
ALU operation.
Review URL: http://codereview.chromium.org/2821014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4913 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is required by more strict compilers (Clang).
Review URL: http://codereview.chromium.org/2037004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4908 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Remove some unused labels.

Review URL: http://codereview.chromium.org/2861011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4906 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also skip case where both number arguments are smis.

Review URL: http://codereview.chromium.org/2814021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4905 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2840011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4904 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2862004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4903 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2819012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2816014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4899 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This changes the way the constants kJSObjectType, kFirstNonstringType and kProxyType are made available to the inlined part of the V8 API. This change to fixed constants resolves linker this linker error Windows

error LNK2001: unresolved external symbol "public: static int v8::internal::Internals::kJSObjectType" (?kJSObjectType@Internals@internal@v8@@2HA)

when linking against a V8 DLL.

This change also makes it possible to build all the C++ tests with ENABLE_DEBUGGER_SUPPORT not defined. Now C++ tests run ENABLE_DEBUGGER_SUPPORT not defined, and only the JavaScript tests which tests the debugger fails when ENABLE_DEBUGGER_SUPPORT is not defined.
Review URL: http://codereview.chromium.org/2820016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4898 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

there throughout the binary op stub (used for checking and
creating heap numbers).
Review URL: http://codereview.chromium.org/2843010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4897 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2840004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4896 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

If a two-byte string only contains ascii characters, then we can save
memory when flattening a cons string containing it. Similarly we can
use this in Array.prototype.join implementation. To track this a new
bit is added to instance type. This bit is used as a hint in generated
code and in runtime functions.

To enable testing a new V8 extension is added controlled by
--expose-externalize-string flag.

Review URL: http://codereview.chromium.org/2762008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4894 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Use direct reading and writing of integers from Smi fields.
Change RecordWrite with 0 offset to take untagged index instead of
smi tagged index.

Review URL: http://codereview.chromium.org/2872005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4893 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2846012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/2824007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4890 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

be in a register anymore. Code also updated to use the bitfield
instructions when available.  This is a commit of
http://codereview.chromium.org/2845003/show for Rodolph Perfetta.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4889 ce2b1a6d-e550-0410-aec6-3dcde31c8c00