Reland "Use off-heap data for type feedback in PolymorphicInstanceCallInstr"

Reland "Use off-heap data for type feedback in PolymorphicInstanceCallInstr"

This is a reapplication of https://codereview.chromium.org/2809583002/
with a fix for the AOT case.

We have been using IC data for receiver type info in the
PolymorphicInstanceCallInstr. This is a data structure optimized for
access from hand-coded assembly stubs, and placed on the GC-ed heap,
which means it has to be accessed through handles. With this change we
move it to the zone memory, which means it can be freed without an
old-gen GC.  As a side-effect the zone arrays use exponential growth for
amortized constant space allocation instead of growing by 1 for
quadratic allocation when we add classes, further reducing memory
pressure.

R=vegorov@google.com
BUG=

Committed: https://github.com/dart-lang/sdk/commit/eeea4fd331dff41d2cf057bc9da6e49aa46d35a8

[Vyacheslav Egorov (Google), 2017-04-25 13:02:32]

lgtm

[erikcorry, 2017-04-25 13:27:24]

Description was changed from

==========
Reland "Use off-heap data for type feedback in PolymorphicInstanceCallInstr"

This is a reapplication of https://codereview.chromium.org/2809583002/
with a fix for the AOT case.

We have been using IC data for receiver type info in the
PolymorphicInstanceCallInstr. This is a data structure optimized for
access from hand-coded assembly stubs, and placed on the GC-ed heap,
which means it has to be accessed through handles. With this change we
move it to the zone memory, which means it can be freed without an
old-gen GC.  As a side-effect the zone arrays use exponential growth for
amortized constant space allocation instead of growing by 1 for
quadratic allocation when we add classes, further reducing memory
pressure.

R=vegorov@google.com
BUG=
==========

to

==========
Reland "Use off-heap data for type feedback in PolymorphicInstanceCallInstr"

This is a reapplication of https://codereview.chromium.org/2809583002/
with a fix for the AOT case.

We have been using IC data for receiver type info in the
PolymorphicInstanceCallInstr. This is a data structure optimized for
access from hand-coded assembly stubs, and placed on the GC-ed heap,
which means it has to be accessed through handles. With this change we
move it to the zone memory, which means it can be freed without an
old-gen GC.  As a side-effect the zone arrays use exponential growth for
amortized constant space allocation instead of growing by 1 for
quadratic allocation when we add classes, further reducing memory
pressure.

R=vegorov@google.com
BUG=

Committed:
https://github.com/dart-lang/sdk/commit/eeea4fd331dff41d2cf057bc9da6e49aa46d35a8
==========

[erikcorry, 2017-04-25 13:27:26]

Committed patchset #2 (id:20001) manually as
eeea4fd331dff41d2cf057bc9da6e49aa46d35a8 (presubmit successful).