Speed up AOT compilation of is-tests.

Speed up AOT compilation of is-tests.

* In subtype-tests in the compiler, allocate temporary objects in new-space.
* Add local StackZone to avoid accumulating zone memory.
* Exlude "Function" type from this optimization.

Fixes #28318.

R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/df2ef7fd4b0e34c45d17a592d1120341cd53f14a

[Florian Schneider, 2017-01-11 18:58:22]

fschneider@google.com changed reviewers:
+ rmacnak@google.com

[rmacnak, 2017-01-11 19:09:01]

lgtm

https://codereview.chromium.org/2622283004/diff/1/runtime/vm/precompiler.cc
File runtime/vm/precompiler.cc (right):

https://codereview.chromium.org/2622283004/diff/1/runtime/vm/precompiler.cc#n...
runtime/vm/precompiler.cc:275: StackZone stack_zone(thread_);
Add a note that we might allocate a lot of handles in one iteration if there is
a deep class hierarchy.

[Florian Schneider, 2017-01-11 19:11:14]

https://codereview.chromium.org/2622283004/diff/1/runtime/vm/precompiler.cc
File runtime/vm/precompiler.cc (right):

https://codereview.chromium.org/2622283004/diff/1/runtime/vm/precompiler.cc#n...
runtime/vm/precompiler.cc:275: StackZone stack_zone(thread_);
On 2017/01/11 19:09:01, rmacnak wrote:
> Add a note that we might allocate a lot of handles in one iteration if there
is
> a deep class hierarchy.

Done.

[Florian Schneider, 2017-01-11 19:13:23]

Description was changed from

==========
Speed up AOT compilation of is-tests.

* In subtype-tests in the compiler, allocate temporary objects in new-space.
* Add local StackZone to avoid accumulating zone memory.
* Exlude "Function" type from this optimization.

Fixes #28318.
==========

to

==========
Speed up AOT compilation of is-tests.

* In subtype-tests in the compiler, allocate temporary objects in new-space.
* Add local StackZone to avoid accumulating zone memory.
* Exlude "Function" type from this optimization.

Fixes #28318.

R=rmacnak@google.com

Committed:
https://github.com/dart-lang/sdk/commit/df2ef7fd4b0e34c45d17a592d1120341cd53f14a
==========

[Florian Schneider, 2017-01-11 19:13:24]

Committed patchset #2 (id:20001) manually as
df2ef7fd4b0e34c45d17a592d1120341cd53f14a (presubmit successful).