[turbofan] New operator for loads of DYNAMIC_[GLOBAL,LOCAL].

[turbofan] New operator for loads of DYNAMIC_[GLOBAL,LOCAL].

This introduces two new operators for loads of variables bound to
Variable::LOOKUP locations. Currently they all still lower to runtime
calls, but will allow optimization during typed lowering.

R=bmeurer@chromium.org

Committed: https://crrev.com/861c427420f22a66890c6a64c1488d8a6c8cf42a
Cr-Commit-Position: refs/heads/master@{#28713}

[Benedikt Meurer, 2015-06-01 04:04:40]

LGTM with comment

https://codereview.chromium.org/1155103004/diff/1/src/compiler/control-builde...
File src/compiler/control-builders.h (right):

https://codereview.chromium.org/1155103004/diff/1/src/compiler/control-builde...
src/compiler/control-builders.h:135: void BreakUnless(Node* condition,
BranchHint hint = BranchHint::kNone);
This seems to be unused now?

[Michael Starzinger, 2015-06-01 07:12:47]

https://codereview.chromium.org/1155103004/diff/1/src/compiler/control-builde...
File src/compiler/control-builders.h (right):

https://codereview.chromium.org/1155103004/diff/1/src/compiler/control-builde...
src/compiler/control-builders.h:135: void BreakUnless(Node* condition,
BranchHint hint = BranchHint::kNone);
On 2015/06/01 04:04:40, Benedikt Meurer wrote:
> This seems to be unused now?

Done. Yep, leftover from my previous CL. Removed.

[Michael Starzinger, 2015-06-01 07:25:56]

The CQ bit was checked by mstarzinger@chromium.org

[Michael Starzinger, 2015-06-01 07:25:56]

The patchset sent to the CQ was uploaded after l-g-t-m from bmeurer@chromium.org
Link to the patchset: https://codereview.chromium.org/1155103004/#ps20001
(title: "Addressed comments.")

[commit-bot: I haz the power, 2015-06-01 07:26:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1155103004/20001

[commit-bot: I haz the power, 2015-06-01 07:35:10]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-01 07:35:21]

Patchset 2 (id:??) landed as
https://crrev.com/861c427420f22a66890c6a64c1488d8a6c8cf42a
Cr-Commit-Position: refs/heads/master@{#28713}