simpler backend for non-toplevel code.

Review URL: http://codereview.chromium.org/549158

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Review URL: http://codereview.chromium.org/487017

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when an existing accessor is redefined (a configurable accessor can
potentially be redefined as a non-configurable (i.e., DONT_DELETE)).


Review URL: http://codereview.chromium.org/556040

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Review URL: http://codereview.chromium.org/556041

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For now, this is a direct port from ia32, so there is probably still
stuff that can be improved here.
Review URL: http://codereview.chromium.org/555131

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generator.

Review URL: http://codereview.chromium.org/553116

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Review URL: http://codereview.chromium.org/556020

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Review URL: http://codereview.chromium.org/552184

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objects in the startup heap from a partial snapshot.  This happens
through the partial snapshot cache.  A startup snapshot and a
partial snapshot are created together so that the startup snapshot
contains the partial snapshot cache entries needed.
Review URL: http://codereview.chromium.org/548149

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on ia32.

1. Operate on the values in edx,eax when possible (all operations
except DIV and MOD).  This saves moving them on entry and when falling
out to the non-smi code.

2. Do not perform ADD and SUB before the smi check of their inputs.
This saves undoing the operation in the case that we fall through to
the non-smi case due to non-smi inputs (probably common?), and we can
avoid emitting the smi check code twice (code size reduction).

3. Don't perform OR twice (once to smi check the inputs and once to
smi check the result).

Review URL: http://codereview.chromium.org/556019

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Review URL: http://codereview.chromium.org/555099

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This test have been timing out on ARM hardware from time to time.
Review URL: http://codereview.chromium.org/543206

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As the start index is already passed it is easy to calculate the "at start" boolean in generated code. Also as direct entry has been implemented this needs to be done in generated code anyway, and therefore might as well be moved to the generated code for RegExp. The "at start" value is now calcualted as a local variable on the native RegExp frame based on the value of the start index argument.

The x64 version have been tested on both Linux and 64-bit Windows Vista.

For ARM I have tested cctest/test-regexp on ARM hardware, but the rest of the tests have only been run on the ARM simulator.
Review URL: http://codereview.chromium.org/554078

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1. MUL and DIV on SMIs.
2. When calling GenericBinaryOpStub from a virtual frame.
3. When generating code for a loop counter.
Overall performance gain is about 0.6%.
Review URL: http://codereview.chromium.org/555098

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Review URL: http://codereview.chromium.org/556018

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Review URL: http://codereview.chromium.org/549147

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Review URL: http://codereview.chromium.org/546147

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This reduces chances of improper usage, see http://code.google.com/p/v8/issues/detail?id=586
for more details.

BUG=586

Review URL: http://codereview.chromium.org/555072

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See Kevin's comments for http://codereview.chromium.org/554062.
Review URL: http://codereview.chromium.org/543193

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Also fixing some formatting issues.
Review URL: http://codereview.chromium.org/556002

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Review URL: http://codereview.chromium.org/545125


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Currently arguments are never passed on registers (due to the way ArgsInRegistersSupported is written) and
if they were, the stub would break in several places because registers are not preserved properly in the
course of execution. This CL makes use of registers more often (than never) and makes sure that registers are
handler properly.
A peformance gain is small (0.2-0.3%) but stable.
This CL was extracted from the one sent out earlier (http://codereview.chromium.org/551093).

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Review URL: http://codereview.chromium.org/543187

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See Chromium bug 32637.

Review URL: http://codereview.chromium.org/553067

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Patch by Erich Ocean and Ryan Dahl.

Review URL: http://codereview.chromium.org/545125

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Review URL: http://codereview.chromium.org/545155

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Review URL: http://codereview.chromium.org/555049

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2.1.0. This means that the next version pushed to trunk will
be the first version in the 2.1.x series. 
Review URL: http://codereview.chromium.org/551139

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We now test for a smi before calling ToNumber and inline
the smi increment/decrement for ++ and --. There only a small
increase in code size but loops in top-level code are
becoming much faster as a result.

Review URL: http://codereview.chromium.org/553056

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BUG=589,27967.

Review URL: http://codereview.chromium.org/555048

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As an afterthought, I realized that I put function objects moves
reporting into a method that deals with only code object moves.  I've
looked up that function objects are allocated in old pointer space and
new space, so I moved logging to the corresponding VM methods.

BUG=553

Review URL: http://codereview.chromium.org/552089

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The stub for calling RegExp directly now also handles two byte strings.

Support for flat cons strings added for both ascii and two byte.

Some code code simplifications and added a few constants.
Review URL: http://codereview.chromium.org/545151

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Review URL: http://codereview.chromium.org/543154

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Review URL: http://codereview.chromium.org/552068

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Review URL: http://codereview.chromium.org/552043

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The problem appeared due to a fact that stubs doesn't create a stack
frame, reusing the stack frame of the caller function. When building
stack traces, the current function is retrieved from PC, and its
callees are retrieved by traversing the stack backwards. Thus, for
stubs, the stub itself was discovered via PC, and then stub's caller's
caller was retrieved from stack.

To fix this problem, a pointer to JSFunction object is now captured
from the topmost stack frame, and is saved into stack trace log
record. Then a simple heuristics is applied whether a referred
function should be added to decoded stack, or not, to avoid reporting
the same function twice (from PC and from the pointer.)

BUG=553
TEST=added to mjsunit/tools/tickprocessor

Review URL: http://codereview.chromium.org/546089

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Always invoke HeapObjectIterator::has_next() before invoking HeapObjectIterator::next().
This is necessary as ::has_next() has an important side-effect of going to the next
page when current page is exhausted.

And to find if pointers are encodable use more precise data---top of map space, not a number
of pages, as pages might stay in map space due to chunking.

Review URL: http://codereview.chromium.org/552066

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Review URL: http://codereview.chromium.org/545153

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Backport optimizations from x64 version to ia32.

Review URL: http://codereview.chromium.org/546087

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compiler for all code.

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