Reviewers: Michael Starzinger,
Message:
PTAL.
Description:
In-place shrinking of descriptor arrays with non-live transitions.
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=
Please review this at https://chromiumcodereview.appspot.com/10575032/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/ast.cc
M src/bootstrapper.cc
M src/factory.cc
M src/ic.cc
M src/mark-compact.cc
M src/objects-debug.cc
M src/objects-inl.h
M src/objects-printer.cc
M src/objects.h
M src/objects.cc
M src/profile-generator.cc
M src/property-details.h
M src/property.h
M src/property.cc
M src/runtime.cc
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