Enable ThinLTO cache.

Enable ThinLTO cache.

This allows to reuse some codegen work when
linking multiple targets with the intersecting set of
object files, resulting in a reduce of overall build time.

This creates a thinlto-cache directory inside src/out/<gn-config-name>/ and keeping a lot of llvmcache* files there.

BUG=672158
Review-Url: https://codereview.chromium.org/2761893002
Cr-Commit-Position: refs/heads/master@{#458418}
Committed: https://chromium.googlesource.com/chromium/src/+/33d8074e449407ac84ad0e6f3ea7ab3dbda19f28

[krasin1, 2017-03-20 18:11:19]

Description was changed from

==========
Enable ThinLTO cache.

This allows to reuse some codegen work when
linking multiple targets with the intersecting set of
object files, resulting in a reduce of overall build time.

BUG=672158
==========

to

==========
Enable ThinLTO cache.

This allows to reuse some codegen work when
linking multiple targets with the intersecting set of
object files, resulting in a reduce of overall build time.

This creates a thinlto-cache directory inside src/out/<gn-config-name>/ and
keeping a lot of llvmcache* files there.

BUG=672158
==========

[krasin1, 2017-03-20 18:12:47]

krasin@chromium.org changed reviewers:
+ dpranke@chromium.org

[krasin1, 2017-03-20 18:12:48]

Hi Dirk,

this is the first time I try to use rebase_path. While it works for me locally
and creates thinlto-cache directory under src/out/gn/, I am not sure if that's
the way to use it. Please, review it carefully.

[krasin1, 2017-03-20 18:13:01]

The CQ bit was checked by krasin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-20 18:13:55]

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, 2017-03-20 19:22:16]

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

[commit-bot: I haz the power, 2017-03-20 19:22:16]

Dry run: Try jobs failed on following builders:
  android_clang_dbg_recipe on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_clan...)

[krasin1, 2017-03-20 19:58:56]

The CQ bit was checked by krasin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-20 19:59:37]

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, 2017-03-20 20:40:54]

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

[commit-bot: I haz the power, 2017-03-20 20:40:55]

Dry run: This issue passed the CQ dry run.

[Dirk Pranke, 2017-03-20 23:35:02]

Yes, I think that's right.

lgtm.

[krasin1, 2017-03-21 15:11:33]

The CQ bit was checked by krasin@chromium.org

[krasin1, 2017-03-21 15:11:44]

On 2017/03/20 23:35:02, Dirk Pranke wrote:
> Yes, I think that's right.
> 
> lgtm.

Thank you, Dirk!

[commit-bot: I haz the power, 2017-03-21 15:11:53]

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, 2017-03-21 15:18:28]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490109093619900, "parent_rev":
"dae8443e7b2e3185f5330ea9a9cc3bbdde0b86aa", "commit_rev":
"33d8074e449407ac84ad0e6f3ea7ab3dbda19f28"}

[commit-bot: I haz the power, 2017-03-21 15:19:13]

Description was changed from

==========
Enable ThinLTO cache.

This allows to reuse some codegen work when
linking multiple targets with the intersecting set of
object files, resulting in a reduce of overall build time.

This creates a thinlto-cache directory inside src/out/<gn-config-name>/ and
keeping a lot of llvmcache* files there.

BUG=672158
==========

to

==========
Enable ThinLTO cache.

This allows to reuse some codegen work when
linking multiple targets with the intersecting set of
object files, resulting in a reduce of overall build time.

This creates a thinlto-cache directory inside src/out/<gn-config-name>/ and
keeping a lot of llvmcache* files there.

BUG=672158

Review-Url: https://codereview.chromium.org/2761893002
Cr-Commit-Position: refs/heads/master@{#458418}
Committed:
https://chromium.googlesource.com/chromium/src/+/33d8074e449407ac84ad0e6f3ea7...
==========

[commit-bot: I haz the power, 2017-03-21 15:19:14]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/33d8074e449407ac84ad0e6f3ea7...

[krasin1, 2017-03-22 16:04:22]

Patchset #2 (id:20001) has been deleted