- Fine grain locking of free list when sweeping concurrently.

Review URL: https://codereview.chromium.org//649743002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41049 260f80e4-7a28-3924-810f-c04153c831b5
Implement bigint absAdd, absSub, mulAdd, sqrAdd, estQuotientDigit intrinsics,
and Montgomery mulMod intrinsics on x64.
Add support for mul, div, shld, adc, sbb instructions on x64.
Add assembler tests.

R=zra@google.com

Review URL: https://codereview.chromium.org//648613006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41050 260f80e4-7a28-3924-810f-c04153c831b5
Remove more multi-thread support. Sorry about how hard it is to review this; diff doesn't handle this kind of change very well.

The assumption is that tasks cannot be interrupted in the single-threaded world of Dart so we no longer need to guard against the case where the state of analysis has changed while executing a task. Please think carefully about the assumption and also check carefully that I have not made any mistakes while making this change (the tests all run, but I'm not sure how well tested this portion of the code base is).

R=scheglov@google.com

Review URL: https://codereview.chromium.org//647033002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41051 260f80e4-7a28-3924-810f-c04153c831b5
Mark analyzer "resolver_test" as slow.

This file contains 1713 unit tests and should be split up into smaller
files.

TBR=scheglov@google.com

Review URL: https://codereview.chromium.org//643303002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41052 260f80e4-7a28-3924-810f-c04153c831b5
Fix x64 build (RBX is callee-saved, use R8 instead).

Review URL: https://codereview.chromium.org//643293002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41053 260f80e4-7a28-3924-810f-c04153c831b5