Instead of overwriting non-live transitions with NULL_DESCRIPTORs, we remove them from the array by compacting the array (shifting live values to the left) and in-place trimming the array. If the final descriptor array contains no live values (only contained transitions which are now all cleared), we move bit_field3 back from the descriptor array to the map. The descriptor array itself will be collected in the next GC.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10575032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11922 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10579041

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11921 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10656018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11920 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10668019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11917 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert r11835 'Unify promotion and allocation limit computation' due to V8 Splay performance regression on Mac.

R=mstarzinger@chromium.org
BUG=134183

Review URL: https://chromiumcodereview.appspot.com/10664013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11916 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10665021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11915 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10637003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This makes sure the literal boilerplates array is correctly shared
together with optimized code when caching of optimized code is enabled.
It also enabled said caching by default again.

R=ulan@chromium.org
BUG=v8:2193
TEST=mjsunit/regress/regress-2193

Review URL: https://chromiumcodereview.appspot.com/10649008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11911 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10633027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11908 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=134055

TEST=mjsunit/regress/regress-crbug-134055

Review URL: https://chromiumcodereview.appspot.com/10630027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11907 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10642019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11906 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org
BUG=v8:2193
TEST=

Review URL: https://chromiumcodereview.appspot.com/10626015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11905 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is a temporary fix to prevent excessive expansion of old-space
caused by inaccuracies in lazy sweeper advancing. We actually don't
intend to sweep any pages eagerly, but that requires further changes
to lazy sweeping.

R=ulan@chromium.org,erik.corry@gmail.com
BUG=v8:2194

Review URL: https://chromiumcodereview.appspot.com/10640002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11904 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10640018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11903 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ulan@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10627015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This adapts the heuristics that detect fragmented pages to reduce memory
footprint for spaces with over reserved memory. This minimizes external
fragmentation caused by pages that cannot be released to the OS because
of just a few live objects on them.

R=erik.corry@gmail.com
TEST=cctest/test-heap/ReleaseOverReservedPages

Review URL: https://chromiumcodereview.appspot.com/10629004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11901 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Adjust idle notification handler to do full GC at the end of idle round in order to compact code space.

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10639002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11900 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

- Ensure that IsFound() is only used when not in combination with other
  checks. To do so, the default type is NONEXISTENT rather than NORMAL;
  and NotFound() also resets the type to NONEXISTENT.
- Use test methods rather than .type() == A_PROPERTY_TYPE.

Review URL: https://chromiumcodereview.appspot.com/10626004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11899 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org
TEST=cctest/test-decls/ExistsInHiddenPrototype

Review URL: https://chromiumcodereview.appspot.com/10628002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11896 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10634002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11893 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org
BUG=v8:2166

Review URL: https://chromiumcodereview.appspot.com/10630003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11892 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The assertion failure I ran into is in Regress1516, where collector falls back to SCAVENGER, during x64.debug.check run.

Zheng Liu
zheng.z.liu@intel.com

Review URL: https://chromiumcodereview.appspot.com/10536199
Patch from Zheng Liu <zheng.z.liu@intel.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11889 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10578039

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11888 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Only handles when x is int32 and y is int32 constant.

BUG=v8:2038

Currently implemented by imul (not fpmul).
x86 and x64 algorithm differs a bit.
x86 implementation is kind of cumbersome, but I couldn't think of better ways.

Review URL: https://chromiumcodereview.appspot.com/10382033
Patch from Zheng Liu <zheng.z.liu@intel.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11887 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10559083

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11886 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10559082

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11885 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10577032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11884 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10584027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11881 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Unbreak bleeding_edge by getting the Parser to work with a CompilationInfo instead of a Handle<Script> and a Zone.  This should have been fixed in the initial patch itself but escaped my attention.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10583031

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11878 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The CompilationInfo record now saves a Zone, and the compiler pipeline
allocates memory from the Zone in the CompilationInfo.  Before
compiling a function, we create a Zone on the stack and save a pointer
to that Zone to the CompilationInfo; which then gets picked up and
allocated from.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10534139

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11877 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10559078

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11874 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Quicksort: Choose pivot with recursive sort of pivot candidates on large arrays to avoid patholgical cases.
Review URL: http://codereview.chromium.org/10532193

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11873 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: http://codereview.chromium.org/10592003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

with more JS code that is loaded into the VM before writing the snapshot.  Get
rid of the hard coded limit on the partial snapshot cache size.  This change
disables most of the serializer tests for the snapshot build of the VM: It's
getting too complicated to support both booting from a snapshot and then
creating a new snapshot from the same VM or loading more code with another
snapshot in the same VM.
Review URL: http://codereview.chromium.org/10574013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11871 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org
BUG=chromium:132741,chromium:132742
TEST=mjsunit/harmony/collections

Review URL: https://chromiumcodereview.appspot.com/10573011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11869 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This changes the compiler to be more aggressive about lazy compilation
of closures with non-trivial outer context. Compilation can only be
triggered with a valid outer context now. One exception is the debugger,
which can request compilation of arbitrary shared code, but it ensures
to trigger compilation only at points where no context is needed.

This relands r11782, r11783, r11790 and a minor fix.

R=ulan@chromium.org
TEST=mjsunit/debug-script-breakpoints-nested

Review URL: https://chromiumcodereview.appspot.com/10543141

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11866 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10573008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11865 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/10536202

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11862 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

(Thanks for diagnosing this.)

R=vegorov@chromium.org
BUG=115100
TEST=

Review URL: https://chromiumcodereview.appspot.com/10576013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11861 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=133211
TEST=test/mjsunit/regress/regress-133211b.js

Review URL: https://chromiumcodereview.appspot.com/10575018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11860 ce2b1a6d-e550-0410-aec6-3dcde31c8c00