X87: Unify "runtime-style" IC functions with Runtime intrinsics

X87: Unify "runtime-style" IC functions with Runtime intrinsics

port bc8041dc2b4c8431c5c2476496acd3b7b8b3f61e (r29811).

original commit message:

    Previous to this CL, ICs used a slightly different code idiom
    to get to C++ code from generated code than runtime intrinsics,
    using an IC_Utility class that in essence provided exactly
    the same functionality as Runtime::FunctionForId, but in its
    own quirky way.

    This CL unifies the two mechanisms, folding IC_Utility
    away by making all IC entry points in C++ code, e.g. IC
    miss handlers, full-fledged runtime intrinsics. This makes
    it possible to eliminate a bunch of ad-hoc declarations and
    adapters that the IC system had to needlessly re-invent.

    As a bonus and the original reason for this yak-shave:
    IC-related C++ runtime functions are now callable from
    TurboFan.

BUG=

Committed: https://crrev.com/2571c69dcb8bbb3eeb2bce86ef46cbe83c562227
Cr-Commit-Position: refs/heads/master@{#29837}

[chunyang.dai, 2015-07-24 09:27:16]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-07-24 09:27:17]

PTAL

[Weiliang, 2015-07-24 09:32:07]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-07-24 09:32:08]

lgtm

[commit-bot: I haz the power, 2015-07-24 09:32:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1252903002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1252903002/1

[commit-bot: I haz the power, 2015-07-24 09:58:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-24 09:59:15]

Patchset 1 (id:??) landed as
https://crrev.com/2571c69dcb8bbb3eeb2bce86ef46cbe83c562227
Cr-Commit-Position: refs/heads/master@{#29837}