PPC: [builtins] Sanitize the machinery around Construct calls.

PPC: [builtins] Sanitize the machinery around Construct calls.

Port 374b6ea210f0ce669cdec3bafd4a72dbba5fe2ad

Original commit message:
    There's no point in collecting feedback for super constructor calls,
    because in all (interesting) cases we can gather (better) feedback from
    other sources (i.e. via inlining or via using a LOAD_IC to get to the
    [[Prototype]] of the target).  So CallConstructStub is now only used
    for new Foo(...args) sites where we want to collect feedback in the
    baseline compiler.  The optimizing compilers, Reflect.construct and
    super constructor calls use the Construct builtin directly, which allows
    us to remove some weird code from the CallConstructStub (and opens the
    possibility for more code sharing with the CallICStub, maybe even going
    for a ConstructICStub).

    Also remove the 100% redundant HCallNew instruction, which is just a
    wrapper for the Construct builtin anyway (indirectly via the
    CallConstructStub).

    Drive-by-fix: Drop unused has_function_cache bit on Code objects.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4413, v8:4430
LOG=n

Committed: https://crrev.com/fe14ba45d656904e50d275a5d0b88342bf721eaf
Cr-Commit-Position: refs/heads/master@{#32186}

[michael_dawson, 2015-11-23 18:48:35]

On 2015/11/23 17:51:15, mtbrandyberry wrote:

lgtm

[JoranSiu, 2015-11-23 18:49:40]

On 2015/11/23 17:51:15, mtbrandyberry wrote:

lgtm

[MTBrandyberry, 2015-11-23 19:41:41]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2015-11-23 19:41:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1471623005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1471623005/1

[commit-bot: I haz the power, 2015-11-23 20:04:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-23 20:05:38]

Patchset 1 (id:??) landed as
https://crrev.com/fe14ba45d656904e50d275a5d0b88342bf721eaf
Cr-Commit-Position: refs/heads/master@{#32186}