MIPS: Generate the TransitionElementsStub using Crankshaft

MIPS: Generate the TransitionElementsStub using Crankshaft

Port r13585 (4174b9d2)

Original commit message:
This includes:
* Adding support for saving callee-clobbered double registers in Crankshaft code.
* Adding a new "HTrapAllocationMemento" hydrogen instruction to handle AllocationSiteInfo data in crankshafted stubs.
* Adding a new "HAllocate" hydrogen instruction that can allocate raw memory from the GC in crankshafted code.
* Support for manipulation of the hole in HChange instructions for Crankshafted stubs.
* Utility routines to manually build loops and if statements containing hydrogen code.

BUG=
TEST=

Committed: https://code.google.com/p/v8/source/detail?r=13655

[danno, 2013-02-11 15:26:41]

https://chromiumcodereview.appspot.com/12212080/diff/1/src/mips/lithium-codeg...
File src/mips/lithium-codegen-mips.h (right):

https://chromiumcodereview.appspot.com/12212080/diff/1/src/mips/lithium-codeg...
src/mips/lithium-codegen-mips.h:62: support_aligned_spilled_doubles_(false),
Do you need this boolean flag anywhere? It appears to be unused on MIPS...

[palfia, 2013-02-11 19:18:23]

Added a new patchset, which removes the unused flag.

https://codereview.chromium.org/12212080/diff/1/src/mips/lithium-codegen-mips.h
File src/mips/lithium-codegen-mips.h (right):

https://codereview.chromium.org/12212080/diff/1/src/mips/lithium-codegen-mips...
src/mips/lithium-codegen-mips.h:62: support_aligned_spilled_doubles_(false),
On 2013/02/11 15:26:41, danno wrote:
> Do you need this boolean flag anywhere? It appears to be unused on MIPS...

Yes, indeed. It seems that this flag is also unused on ARM, should I also remove
this on ARM (maybe in another CL)?

[danno, 2013-02-13 12:23:53]

lgtm

It would be great if you did remove it on ARM, too, in a separate CL. :-)

[palfia, 2013-02-13 15:31:21]

On 2013/02/13 12:23:53, danno wrote:
> lgtm
> 
> It would be great if you did remove it on ARM, too, in a separate CL. :-)

Submitted the new CL for ARM :-)

https://codereview.chromium.org/12258013/