Don't gvn HForeignCode without source text

Don't gvn HForeignCode without source text

There are a few synthetic templates that are generated from trees instead of source text. I don't think any are marked for GVN, but this is a hazard so best fix it.

TBR=sigmund@google.com

BUG=

Committed: https://github.com/dart-lang/sdk/commit/3b5c1541386a71ea1c3715298710a82dab1ce4d9

[sra1, 2016-10-19 21:29:51]

Description was changed from

==========
Don't gvn HForeignCode without source text

There are a few synthetic templates. I don't think any are marked for GVN, but
this is a hazard so best fix it.

TBR=sigmund@google.com

BUG=
==========

to

==========
Don't gvn HForeignCode without source text

There are a few synthetic templates that are generated from trees instead of
source text. I don't think any are marked for GVN, but this is a hazard so best
fix it.

TBR=sigmund@google.com

BUG=
==========

[sra1, 2016-10-19 21:47:05]

Description was changed from

==========
Don't gvn HForeignCode without source text

There are a few synthetic templates that are generated from trees instead of
source text. I don't think any are marked for GVN, but this is a hazard so best
fix it.

TBR=sigmund@google.com

BUG=
==========

to

==========
Don't gvn HForeignCode without source text

There are a few synthetic templates that are generated from trees instead of
source text. I don't think any are marked for GVN, but this is a hazard so best
fix it.

TBR=sigmund@google.com

BUG=

Committed:
https://github.com/dart-lang/sdk/commit/3b5c1541386a71ea1c3715298710a82dab1ce4d9
==========

[sra1, 2016-10-19 21:47:06]

Committed patchset #1 (id:1) manually as
3b5c1541386a71ea1c3715298710a82dab1ce4d9 (presubmit successful).

[Siggi Cherem (dart-lang), 2016-10-19 22:11:35]

lgtm