Reviewers: Jakob,
Message:
PTAL.
Reviewer guidance:
Main changes are: 1) the transitioned ElementsKind for the default Array()
are
cached in the global context and used in stubs in the Array constructor. 2)
Array construction in the runtime is bottlenecked through new common
routines in
heap.cc to make sure that the ElementsKind transition policy for new Arrays
is
handled consistently for all allocations.
Description:
Store transitioned JSArray maps in global context
BUG=
TEST=
Please review this at http://codereview.chromium.org/9073007/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/accessors.cc
M src/arm/builtins-arm.cc
M src/arm/macro-assembler-arm.h
M src/arm/macro-assembler-arm.cc
M src/bootstrapper.cc
M src/builtins.cc
M src/contexts.h
M src/factory.h
M src/factory.cc
M src/heap.h
M src/heap.cc
M src/ia32/builtins-ia32.cc
M src/ia32/macro-assembler-ia32.h
M src/ia32/macro-assembler-ia32.cc
M src/objects-inl.h
M src/objects.h
M src/objects.cc
M src/parser.cc
M src/runtime.cc
M src/x64/builtins-x64.cc
M src/x64/macro-assembler-x64.h
M src/x64/macro-assembler-x64.cc
M test/cctest/test-heap.cc
M test/mjsunit/array-construct-transition.js
M test/mjsunit/elements-kind.js
M test/mjsunit/elements-transition.js
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