dart2js: split getInterceptor calls out of HIs and HTypeGuard

[rakudrama]

Some type test instructions are directly generating calls to getInterceptor.
These calls should be broken out of type tests as separate HInterceptor instruction to enable all the interceptor optimizations.

This means that many type tests will now have control flow.

[kasperl]

Added this to the Later milestone.

[rakudrama]

Marked this as blocking #9971.

[kasperl]

Added TriageForM5 label.

[kasperl]

Removed TriageForM5 label.

[rakudrama]

Marked this as blocking #13955.

[kasperl]

Nicolas, do you have any cycles to try to help address this? I'm mostly worried about this issue blocking issue #13955. I'll assign issue #9726 to you too so you can take a look at the overall issue.

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Set owner to ngeoffray@google.com.
Removed this from the Later milestone.
Added this to the M8 milestone.
Removed Priority-Medium label.
Added Priority-High label.

[DartBot]

This comment was originally written by ngeoffray@google.com

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This was fixed for a long time. What is not implemented is an optimization to pass the interceptor to cast and checked mode helpers. I filed https://code.google.com/p/dart/issues/detail?id=14630 for that.

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Added Fixed label.

[DartBot]

This comment was originally written by ngeoffray@google.com

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Unmarked this as blocking #13955.