PPC: [compiler] Add relocatable pointer constants for wasm memory references.

PPC: [compiler] Add relocatable pointer constants for wasm memory references.

Port eb5fe0df64ec0add423b2a1f6fb62d5a33dce2a5

Original commit message:
    Add relocatable pointers for wasm memory references that need to
    be updated when wasm GrowMemory is used. Code generator changes to
    accept relocatable constants as immediates.

R=gdeepti@google.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/ba053c4620c3b91ddc540f733f8b4dd9a792bb13
Cr-Commit-Position: refs/heads/master@{#35203}

[MTBrandyberry, 2016-04-01 02:52:20]

PTAL

[MTBrandyberry, 2016-04-01 02:52:25]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-04-01 02:52:36]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1851543004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1851543004/1

[JoranSiu, 2016-04-01 03:02:31]

On 2016/04/01 02:52:36, commit-bot: I haz the power wrote:
> Dry run: CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1851543004/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1851543004/1

lgtm

[commit-bot: I haz the power, 2016-04-01 06:08:56]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-04-01 06:08:57]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2016-04-01 13:11:57]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2016-04-01 13:12:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1851543004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1851543004/1

[commit-bot: I haz the power, 2016-04-01 13:14:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-01 13:14:40]

Description was changed from

==========
PPC: [compiler] Add relocatable pointer constants for wasm memory references.

Port eb5fe0df64ec0add423b2a1f6fb62d5a33dce2a5

Original commit message:
    Add relocatable pointers for wasm memory references that need to
    be updated when wasm GrowMemory is used. Code generator changes to
    accept relocatable constants as immediates.

R=gdeepti@google.com, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
==========

to

==========
PPC: [compiler] Add relocatable pointer constants for wasm memory references.

Port eb5fe0df64ec0add423b2a1f6fb62d5a33dce2a5

Original commit message:
    Add relocatable pointers for wasm memory references that need to
    be updated when wasm GrowMemory is used. Code generator changes to
    accept relocatable constants as immediates.

R=gdeepti@google.com, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/ba053c4620c3b91ddc540f733f8b4dd9a792bb13
Cr-Commit-Position: refs/heads/master@{#35203}
==========

[commit-bot: I haz the power, 2016-04-01 13:14:40]

Patchset 1 (id:??) landed as
https://crrev.com/ba053c4620c3b91ddc540f733f8b4dd9a792bb13
Cr-Commit-Position: refs/heads/master@{#35203}

[MTBrandyberry, 2016-04-01 15:29:29]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1851823002/ by mbrandy@us.ibm.com.

The reason for reverting is: Original commit reverted..