Fix HConstant(double, ...) constructor

Fix HConstant(double, ...) constructor

It must always populate int32_value_, even if that's lossy, because other code (specifically, constant folding for truncating operations) relies on it.

BUG=v8:3865
LOG=y

Committed: https://crrev.com/bfe7f4af141da71aefd3af5b0733d1cb27281cf6
Cr-Commit-Position: refs/heads/master@{#26453}

[Jakob Kummerow, 2015-02-05 10:01:42]

Patchset #1 (id:1) has been deleted

[Jakob Kummerow, 2015-02-05 10:03:22]

jkummerow@chromium.org changed reviewers:
+ bmeurer@chromium.org

[Jakob Kummerow, 2015-02-05 10:03:23]

From class HConstant in hydrogen-instructions.h:

  int32_t NumberValueAsInteger32() const {
    DCHECK(HasNumberValue());
    // Irrespective of whether a numeric HConstant can be safely
    // represented as an int32, we store the (in some cases lossy)
    // representation of the number in int32_value_.
    return int32_value_;
  }


PTAL, and CQ it if you like it.

[Benedikt Meurer, 2015-02-05 10:05:22]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2015-02-05 10:05:23]

lgtm

[commit-bot: I haz the power, 2015-02-05 10:05:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/897263002/20001

[commit-bot: I haz the power, 2015-02-05 10:28:11]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-02-05 10:28:20]

Patchset 1 (id:??) landed as
https://crrev.com/bfe7f4af141da71aefd3af5b0733d1cb27281cf6
Cr-Commit-Position: refs/heads/master@{#26453}