MIPS: Correctify instanceof and make it optimizable.

MIPS: Correctify instanceof and make it optimizable.

The previous hack with HInstanceOfKnownGlobal was not only slower,
but also very brittle and required a lot of weird hacks to support it. And
what's even more important it wasn't even correct (because a map check
on the lhs is never enough for instanceof).

The new implementation provides a sane runtime implementation
for InstanceOf plus a fast case in the InstanceOfStub, combined with
a proper specialization in the case of a known global in CrankShaft,
which does only the prototype chain walk (coupled with a code
dependency on the known global).

As a drive-by-fix: Also fix the incorrect Object.prototype.isPrototypeOf
implementation.

BUG=v8:4376
LOG=y

[paul.l..., 2015-08-25 01:10:07]

paul.lind@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com

[paul.l..., 2015-08-25 01:10:08]

l-g-t-m except for one typo. I will also delete a couple (now) unused functions
from the macro-assemblers.

https://codereview.chromium.org/1316543002/diff/1/src/objects.h
File src/objects.h (right):

https://codereview.chromium.org/1316543002/diff/1/src/objects.h#newcode6729
src/objects.h:6729: ((kBound + kCompilerHintsSmiTagSize) / kBitsPerByte);
Typo: this must be kBoundFunction

[paul.l..., 2015-08-25 01:29:38]

paul.lind@imgtec.com changed reviewers:
+ bmeurer@chromium.org, yangguo@chromium.org

[paul.l..., 2015-08-25 01:29:38]

The ports were done by Balázs & Ákos, I've re-uploaded this to fix a tiny issue.

Benedikt, this is ready for inclusion in your
https://codereview.chromium.org/1304633002/

[Benedikt Meurer, 2015-08-25 04:22:07]

Thanks a lot, Balázs & Ákos & Paul, I've included the patch.