MIPS: Collect type feedback on result of Math.[round|ceil|floor]

MIPS: Collect type feedback on result of Math.[round|ceil|floor]

Original commit message:
By recording invocations of these builtins that can return -0, we now learn to not emit Crankshaft code that only handles integer results, avoiding deopt loops.

BUG=

[paul.l..., 2015-05-04 16:12:24]

paul.lind@imgtec.com changed reviewers:
+ paul.lind@imgtec.com

[paul.l..., 2015-05-04 16:12:25]

mips32 part l-g-t-m

[paul.l..., 2015-05-04 18:22:38]

paul.lind@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, danno@chromium.org, dusan.milosavljevic@imgtec.com

[paul.l..., 2015-05-04 18:22:39]

One small optimization issue, then mips64 l-g-t-m also.

https://codereview.chromium.org/1127573004/diff/20001/src/mips64/code-stubs-m...
File src/mips64/code-stubs-mips64.cc (right):

https://codereview.chromium.org/1127573004/diff/20001/src/mips64/code-stubs-m...
src/mips64/code-stubs-mips64.cc:2966: __ dsll(temp1, temp1, kPointerSizeLog2);
Use SmiScale(temp1, slot, kPointerSizeLog2) here to save one instruction?
Also in next 2 functions...

[paul.l..., 2015-05-04 18:55:17]

Done. l-g-t-m.

[danno, 2015-05-05 06:39:41]

Thanks a lot for the patch! I'll integrate it into my patch for the other
platforms.