[strong] Fix weird work-around for magic truncating int conversions.

[strong] Fix weird work-around for magic truncating int conversions.

Bitwise operations in strong mode must not magically truncate
oddballs to integers, but must throw in this case.  This basically
disable the whole truncate-to-int32 optimization for strong mode
bitwise operations, but is still better than having to do oddball
checks for every strong bitwise operation (which esp. includes the
BinaryOpIC stubs for that).

R=rossberg@chromium.org

[Benedikt Meurer, 2015-08-13 09:39:30]

Hey Andreas,

This is the fix we worked on offline.
Please take a look.

Thanks,
Benedikt

[rossberg, 2015-08-13 09:43:09]

lgtm

[Benedikt Meurer, 2015-08-13 09:43:30]

Conrad: FYI

[Benedikt Meurer, 2015-08-13 09:43:35]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-08-13 09:43:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1288313003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1288313003/1

[commit-bot: I haz the power, 2015-08-13 09:51:37]

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

[commit-bot: I haz the power, 2015-08-13 09:51:37]

Try jobs failed on following builders:
  v8_linux_arm64_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm64_rel/builds/8516)