If a function contains more than a certain number of locals (IA32: 9, X64: 6, ARM: 4) 
a loop for initializing the locals with 'undefined' is more compact. 
For less locals we unroll that loop by emitting a sequence of push instructions.

Review URL: http://codereview.chromium.org/515012

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- Replaced the or instruction with lea. 

Review URL: http://codereview.chromium.org/521003

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non-large objects that cannot contain non-map-word pointers to other
heap objects into the old data space.

Review URL: http://codereview.chromium.org/502100

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3519 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=fschneider@chromium.org
Review URL: http://codereview.chromium.org/507069

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that attempt to run with a small heap.  Additionally, it can
potentially keep a lot of string data alive and it is never flushed.
Can we make it grow dynamically if used so that we can still start the
VM with a small heap size?
Review URL: http://codereview.chromium.org/503081

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the code generator.

The runtime function checks if it needs to create a boilerplate
object or if it can clone from an existing boilerplate.

This is already done in the top-level compiler. 

Review URL: http://codereview.chromium.org/507036

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- Change the instruction order for inlined allocation.

Review URL: http://codereview.chromium.org/501170

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3514 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/503079

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int32 for bitops.  undefined converts to zero in ToInt32 conversions.

Review URL: http://codereview.chromium.org/508020

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Review URL: http://codereview.chromium.org/508006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3509 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

the comparison it uses in the code generator.  Use Math.floor for
date operations.
Review URL: http://codereview.chromium.org/509007

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us much.
Review URL: http://codereview.chromium.org/509006

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operation can throw an exception.

Review URL: http://codereview.chromium.org/504073

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fixed contexts slots. Take this into account when using
the new, fast context creation path to avoid allocating
too many slots (wasteful).
Review URL: http://codereview.chromium.org/501148

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input so we don't have to check the exception flags afterwards.
Review URL: http://codereview.chromium.org/509001

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MacroAssembler::PopHandleScope emits a runtime call (through a stub),
which should not be allowed to perform a GC but return a failure
instead.

BUG=30790
TEST=none

Review URL: http://codereview.chromium.org/504071

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Review URL: http://codereview.chromium.org/491079


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Recommit r3494 after fixing stupid mistake where the deferred code stub didn't know it was reversed.

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Still no support for lookup-variables, so we bailout if using the catch variable.

Review URL: http://codereview.chromium.org/501076


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Force mark sweep instead of compcation if size of map space is too big to allow forward pointers encoding.

Review URL: http://codereview.chromium.org/507025

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is a constant by avoiding a few checks.
Review URL: http://codereview.chromium.org/504057

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Review URL: http://codereview.chromium.org/501113

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to floating point and then converting back we convert directly to a
32 bit integer.  In addition the bit twiddling implementation of float-
to-integer conversion has been ported from ARM.  Testing has shown that
this runs faster than the x87 or SSE3 rounding instructions.  This change
is IA32 only.  There may be a smaller benefit from doing the same on x64.
Review URL: http://codereview.chromium.org/506052

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Review URL: http://codereview.chromium.org/504056

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-Inlined double variant of compare iff one of the sides is a constant smi and it is not a for loop condition.

Review URL: http://codereview.chromium.org/507040

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  for DeferredInlineBinaryOperations.

Review URL: http://codereview.chromium.org/502067

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arrays and argument objects on IA-32.
Review URL: http://codereview.chromium.org/503042

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property name in a register rather than on the stack below the
receiver and arguments.

Implemented only for IA32, passing the name in the ecx register to
match the calling convention of the load ICs.

Review URL: http://codereview.chromium.org/502028

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if logging producers is turned off.
Review URL: http://codereview.chromium.org/500092

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Review URL: http://codereview.chromium.org/507035

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On 32-bit the maps are now aligned on a 32-byte boundary in order to encode more maps during compacting GC. The actual size of a map on 32-bit is 28 bytes making this change waste 4 bytes per map.

On 64-bit the encoding for compacting GC is now using more than 32-bits and the maps here are still pointer size aligned. The actual size of a map on 64-bit is 48 bytes and this change does not intruduce any waste.

My choice of 16 bits for kMapPageIndexBits for 64-bit should give the same maximum number of pages (8K) for map space. As maps on 64-bit are larger than on 32-bit the total number of maps on 64-bit will be smaller than on 32-bit. We could consider raising this to 17 or 18.

I moved the kPageSizeBits to globals.h as the calculation of the encoding really depended on this.

There are still an #ifdef/#endif in objects.h and this constant could be moved to globaks.h as well, but I kept it together with the related constants.

All the tests run in debug mode with additional options --gc-global --always-compact as well (except for a few tests on which also fails before this change when run with --gc-global --always-compact).

BUG=http://code.google.com/p/v8/issues/detail?id=524
BUG=http://crbug.com/29428
TEST=test/mjsunit/regress/regress-524.js

Review URL: http://codereview.chromium.org/504026

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TBR=ager@chromium.org
Review URL: http://codereview.chromium.org/500090

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3480 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/500089

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3479 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/506050

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functions by allocating them in new space without
entering the runtime system.
Review URL: http://codereview.chromium.org/506037

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Review URL: http://codereview.chromium.org/502031

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