Florian Schneider 5daa5646ef VM: Fix issue with optimizing compiler's range analysis.
Narrowing of ranges should only occur if the new range is actually
narrower than the old range. It can happen that a symbolic range
is worse than the already computed one. Ignore the new range in this
case.

BUG=dartbug.com/23693
R=vegorov@google.com

Review URL: https://codereview.chromium.org//1219623004.
2015-06-29 16:14:06 +02:00
2015-05-18 19:33:16 +02:00
2015-06-24 16:11:49 -07:00
2015-05-18 21:23:19 -07:00

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