s390: TF Codegen Optimization

s390: TF Codegen Optimization

List of items:
  1. Avoid zero-extending for subsequent 32-bit operations if current operation does not change upper 32-bit or does zero-extending.
  2. Match complex address mode for binary operation where possible (eg. use Add R,MEM).
  3. Detect instruction forms in selector. Eg. kAllowRRR, kAllowRM
  4. Optimize sequence for Int32MulWithOverflow, Int32Div, etc.
  5. Remove Not32/Not64 which is the same as XOR

R=bjaideep@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2649113007
Cr-Commit-Position: refs/heads/master@{#42669}
Committed: https://chromium.googlesource.com/v8/v8/+/f7a3ede0820ee6c30ac6e5199536a0c60f69d331

[john.yan, 2017-01-25 18:52:23]

ptal

[JaideepBajwa, 2017-01-25 20:25:09]

lgtm

[john.yan, 2017-01-25 20:31:18]

The CQ bit was checked by jyan@ca.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2017-01-25 20:31:26]

Dry run: 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, 2017-01-25 21:03:02]

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

[commit-bot: I haz the power, 2017-01-25 21:03:03]

Dry run: This issue passed the CQ dry run.

[john.yan, 2017-01-25 21:51:29]

The CQ bit was unchecked by jyan@ca.ibm.com

[john.yan, 2017-01-25 23:10:06]

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

[john.yan, 2017-01-25 23:10:06]

The patchset sent to the CQ was uploaded after l-g-t-m from bjaideep@ca.ibm.com
Link to the patchset: https://codereview.chromium.org/2649113007/#ps20001
(title: "remove 2 unnecessary unreachables")

[commit-bot: I haz the power, 2017-01-25 23:10:13]

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, 2017-01-25 23:42:15]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1485385806136460,
"parent_rev": "c8691efb38242c5481428d63bc16fddee73879ac", "commit_rev":
"f7a3ede0820ee6c30ac6e5199536a0c60f69d331"}

[commit-bot: I haz the power, 2017-01-25 23:42:19]

Description was changed from

==========
s390: TF Codegen Optimization

List of items:
  1. Avoid zero-extending for subsequent 32-bit operations if current operation
does not change upper 32-bit or does zero-extending.
  2. Match complex address mode for binary operation where possible (eg. use Add
R,MEM).
  3. Detect instruction forms in selector. Eg. kAllowRRR, kAllowRM
  4. Optimize sequence for Int32MulWithOverflow, Int32Div, etc.
  5. Remove Not32/Not64 which is the same as XOR

R=bjaideep@ca.ibm.com, joransiu@ca.ibm.com
BUG=
==========

to

==========
s390: TF Codegen Optimization

List of items:
  1. Avoid zero-extending for subsequent 32-bit operations if current operation
does not change upper 32-bit or does zero-extending.
  2. Match complex address mode for binary operation where possible (eg. use Add
R,MEM).
  3. Detect instruction forms in selector. Eg. kAllowRRR, kAllowRM
  4. Optimize sequence for Int32MulWithOverflow, Int32Div, etc.
  5. Remove Not32/Not64 which is the same as XOR

R=bjaideep@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2649113007
Cr-Commit-Position: refs/heads/master@{#42669}
Committed:
https://chromium.googlesource.com/v8/v8/+/f7a3ede0820ee6c30ac6e5199536a0c60f6...
==========

[commit-bot: I haz the power, 2017-01-25 23:42:20]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/f7a3ede0820ee6c30ac6e5199536a0c60f6...