[turbofan] Gracefully handle missing info()->context() in CodeGenerator::IsMaterializableFromFrame()

[turbofan] Gracefully handle missing info()->context() in CodeGenerator::IsMaterializableFromFrame()

R=mstarzinger@chromium.org
BUG=

Committed: https://crrev.com/a38a573ade0b306a961b32be8065fb0db9898cee
Cr-Commit-Position: refs/heads/master@{#30176}

[Michael Starzinger, 2015-08-14 11:52:38]

https://codereview.chromium.org/1292233004/diff/1/src/compiler/code-generator.cc
File src/compiler/code-generator.cc (right):

https://codereview.chromium.org/1292233004/diff/1/src/compiler/code-generator...
src/compiler/code-generator.cc:535: if (!info()->parse_info()) return;  //
TODO(titzer): that was unfortunate.
nit: Can we use has_shared_info() here instead? We shouldn't need to care about
the ParseInfo vs. CompilationInfo madness here.

Also is it really safe to just bailout here without building a translation?

[titzer, 2015-08-14 12:32:23]

On 2015/08/14 11:52:38, Michael Starzinger wrote:
>
https://codereview.chromium.org/1292233004/diff/1/src/compiler/code-generator.cc
> File src/compiler/code-generator.cc (right):
> 
>
https://codereview.chromium.org/1292233004/diff/1/src/compiler/code-generator...
> src/compiler/code-generator.cc:535: if (!info()->parse_info()) return;  //
> TODO(titzer): that was unfortunate.
> nit: Can we use has_shared_info() here instead? We shouldn't need to care
about
> the ParseInfo vs. CompilationInfo madness here.
>

Done.
 
> Also is it really safe to just bailout here without building a translation?

As discussed with jarin@, in this case it's a compilation of a STUB, which
aren't patched for lazy deopts.

[Michael Starzinger, 2015-08-14 12:35:34]

LGTM if Jaro concurs.

[titzer, 2015-08-14 12:42:34]

The CQ bit was checked by titzer@chromium.org

[commit-bot: I haz the power, 2015-08-14 12:42:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1292233004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1292233004/20001

[commit-bot: I haz the power, 2015-08-14 13:07:34]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-08-14 13:07:52]

Patchset 2 (id:??) landed as
https://crrev.com/a38a573ade0b306a961b32be8065fb0db9898cee
Cr-Commit-Position: refs/heads/master@{#30176}