PPC/s390: [wasm] Use builtins wrappers for traps

PPC/s390: [wasm] Use builtins wrappers for traps

Port 73d45c9630f4e7561d5c6155cae97bb43dffaa54

Original Commit Message:

    With this CL the out-of-line code of TrapIf will call a builtin instead
    of doing a direct runtime call, which is cheaper. In the best case, the
    out-of-line code now consists of a single call instruction. The builtin
    will load the trapID and then call the runtime to throw a trap.

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

Review-Url: https://codereview.chromium.org/2713433003
Cr-Commit-Position: refs/heads/master@{#43382}
Committed: https://chromium.googlesource.com/v8/v8/+/f8158cdbdb58dfbf095581af386ceac7f7314af7

[JaideepBajwa, 2017-02-22 15:48:07]

ptal

[john.yan, 2017-02-22 16:03:03]

lgtm

[JaideepBajwa, 2017-02-22 16:05:24]

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

[commit-bot: I haz the power, 2017-02-22 16:05:26]

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, 2017-02-22 16:24:40]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487779524751250, "parent_rev":
"d1160fb14f767f230f4d276b4bef49f846bb7a94", "commit_rev":
"f8158cdbdb58dfbf095581af386ceac7f7314af7"}

[commit-bot: I haz the power, 2017-02-22 16:24:44]

Description was changed from

==========
PPC/s390: [wasm] Use builtins wrappers for traps

Port 73d45c9630f4e7561d5c6155cae97bb43dffaa54

Original Commit Message:

    With this CL the out-of-line code of TrapIf will call a builtin instead
    of doing a direct runtime call, which is cheaper. In the best case, the
    out-of-line code now consists of a single call instruction. The builtin
    will load the trapID and then call the runtime to throw a trap.

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

to

==========
PPC/s390: [wasm] Use builtins wrappers for traps

Port 73d45c9630f4e7561d5c6155cae97bb43dffaa54

Original Commit Message:

    With this CL the out-of-line code of TrapIf will call a builtin instead
    of doing a direct runtime call, which is cheaper. In the best case, the
    out-of-line code now consists of a single call instruction. The builtin
    will load the trapID and then call the runtime to throw a trap.

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

Review-Url: https://codereview.chromium.org/2713433003
Cr-Commit-Position: refs/heads/master@{#43382}
Committed:
https://chromium.googlesource.com/v8/v8/+/f8158cdbdb58dfbf095581af386ceac7f73...
==========

[commit-bot: I haz the power, 2017-02-22 16:24:45]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/f8158cdbdb58dfbf095581af386ceac7f73...