[turbofan] Raise max virtual registers and call parameter limit.

[turbofan] Raise max virtual registers and call parameter limit.

Change InstructionOperand to use a 64-bit field for encoding the operand
information instead of the 32-bit field that was used before. Ideally we
wouldn't use the Zone-allocated bit field at all, and use an integer
instead of the pointer; but that requires fixing the register allocator
first, which will take some time.

TEST=mjsunit/compiler/regress-3786
BUG=v8:3786
LOG=y

Committed: https://crrev.com/b5e8dd0e1228972eb579fd155442c1eb846b286b
Cr-Commit-Position: refs/heads/master@{#25941}

[Benedikt Meurer, 2014-12-24 17:58:20]

bmeurer@chromium.org changed reviewers:
+ dcarney@chromium.org, ishell@chromium.org, machenbach@chromium.org

[Benedikt Meurer, 2014-12-24 17:58:21]

Not the ideal final solution, but way better than the current behavior. Doesn't
increase memory usage on 64-bit since minimum allocation unit for zone is 8 byte
anyway. On 32-bit we have a slight increase in memory usage, but not relevant in
practice.

Would like to land this soonish. PTAL

[dcarney, 2014-12-24 19:51:41]

lgtm

[Benedikt Meurer, 2014-12-25 17:50:00]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2014-12-25 17:50:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/826673002/1

[commit-bot: I haz the power, 2014-12-25 18:17:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-25 18:18:17]

Patchset 1 (id:??) landed as
https://crrev.com/b5e8dd0e1228972eb579fd155442c1eb846b286b
Cr-Commit-Position: refs/heads/master@{#25941}