PPC/s390: [crankshaft] Fix Smi overflow in {HMaybeGrowElements}.

PPC/s390: [crankshaft] Fix Smi overflow in {HMaybeGrowElements}.

Port 6c12d57eada07ab019f84b2882faee6e2815a7ff

Original Commit Message:

    This fixes the case where the index passed to {HMaybeGrowElements} used
    to derive the new capacity for the elements backing store does not fit
    into Smi range. Such an overflow would fail the capacity check and cause
    growing to be skipped. Subsequent keyed stores would potentially go out
    of bounds.

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=chromium:686427
LOG=N

Review-Url: https://codereview.chromium.org/2697473004
Cr-Commit-Position: refs/heads/master@{#43167}
Committed: https://chromium.googlesource.com/v8/v8/+/673bbcbb9d555ee2492b860301c026caed112585

[JaideepBajwa, 2017-02-13 18:49:03]

ptal

[john.yan, 2017-02-13 18:50:10]

lgtm

[JaideepBajwa, 2017-02-13 18:50:29]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2017-02-13 18:50:38]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-13 19:18:30]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487011829388900, "parent_rev":
"2dab40ccda08c6382ae69e5d51bbc1c5c4f3a7aa", "commit_rev":
"673bbcbb9d555ee2492b860301c026caed112585"}

[commit-bot: I haz the power, 2017-02-13 19:18:35]

Description was changed from

==========
PPC/s390: [crankshaft] Fix Smi overflow in {HMaybeGrowElements}.

Port 6c12d57eada07ab019f84b2882faee6e2815a7ff

Original Commit Message:

    This fixes the case where the index passed to {HMaybeGrowElements} used
    to derive the new capacity for the elements backing store does not fit
    into Smi range. Such an overflow would fail the capacity check and cause
    growing to be skipped. Subsequent keyed stores would potentially go out
    of bounds.

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=chromium:686427
LOG=N
==========

to

==========
PPC/s390: [crankshaft] Fix Smi overflow in {HMaybeGrowElements}.

Port 6c12d57eada07ab019f84b2882faee6e2815a7ff

Original Commit Message:

    This fixes the case where the index passed to {HMaybeGrowElements} used
    to derive the new capacity for the elements backing store does not fit
    into Smi range. Such an overflow would fail the capacity check and cause
    growing to be skipped. Subsequent keyed stores would potentially go out
    of bounds.

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=chromium:686427
LOG=N

Review-Url: https://codereview.chromium.org/2697473004
Cr-Commit-Position: refs/heads/master@{#43167}
Committed:
https://chromium.googlesource.com/v8/v8/+/673bbcbb9d555ee2492b860301c026caed1...
==========

[commit-bot: I haz the power, 2017-02-13 19:18:36]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/673bbcbb9d555ee2492b860301c026caed1...