MIPS: Adapt hydrogen-based Array constructor to also support InternalArray and function call versions.

Port r14948 (1c2f28c)

BUG=

Review URL: https://codereview.chromium.org/16407004
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14958 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Fix LStoreKeyed error when tracing instruction.

Port r14951 (01dbfe2)

Original commit message:
LStoreKeyed can have a NULL value(), when we recognize we are storing a constant
hole value.

BUG=

Review URL: https://codereview.chromium.org/16171019
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14959 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Don't force representations in the loop builder.
Additionally, infer None-typed CompareIDAndBranch to Smi+actual input.

R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/16365004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14960 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Add LoadIC_Slow builtin and use it for loading properties from primitive values.

Port r14950 (12748bb)

Original commit message:
This fixes recent performance regressions on Dromaeo.

BUG=chromium:242512

Review URL: https://codereview.chromium.org/16452011
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14961 ce2b1a6d-e550-0410-aec6-3dcde31c8c00