MIPS: CallIC customization stubs must accept that a vector slot is cleared.

MIPS: CallIC customization stubs must accept that a vector slot is cleared.

Port r22668 (7be1212)

Original commit message:
The CallIC Array custom IC stub read from the type vector, expecting
to get an AllocationSite. But there are paths in the system where a
type vector can be re-created with default values, even though we
currently grant an exception to clearing of vector slots with
AllocationSites in them at gc time.

BUG=392114
LOG=N
R=paul.lind@imgtec.com

Committed: https://code.google.com/p/v8/source/detail?r=22683

[paul.l..., 2014-07-29 19:25:56]

LGTM, but please fix the nit when landing.

https://codereview.chromium.org/420793003/diff/1/src/mips64/code-stubs-mips64.cc
File src/mips64/code-stubs-mips64.cc (right):

https://codereview.chromium.org/420793003/diff/1/src/mips64/code-stubs-mips64...
src/mips64/code-stubs-mips64.cc:3176: // Verify that r4 contains an
AllocationSite
nit: register name a4

[balazs.kilvady, 2014-07-29 19:35:28]

https://codereview.chromium.org/420793003/diff/1/src/mips64/code-stubs-mips64.cc
File src/mips64/code-stubs-mips64.cc (right):

https://codereview.chromium.org/420793003/diff/1/src/mips64/code-stubs-mips64...
src/mips64/code-stubs-mips64.cc:3176: // Verify that r4 contains an
AllocationSite
On 2014/07/29 19:25:56, paul.l... wrote:
> nit: register name a4

Done.

[balazs.kilvady, 2014-07-29 19:36:47]

Committed patchset #2 manually as r22683 (presubmit successful).