Removed bailout-only 'implementations' of intrinsics in Crankshaft.

Removed bailout-only 'implementations' of intrinsics in Crankshaft.

Doing a runtime call should always be better than totally giving up
(unless we have fullcode-only intrinsics, which we'll probably never
have).

BUG=v8:3947
LOG=n

Committed: https://crrev.com/db2d31ab3b8a51eeab1cd2c44dc9bb5151e9af97
Cr-Commit-Position: refs/heads/master@{#27110}

[Sven Panne, 2015-03-10 13:46:14]

svenpanne@chromium.org changed reviewers:
+ mstarzinger@chromium.org

[Michael Starzinger, 2015-03-10 13:52:16]

LGTM (if it doesn't tank anything due to Crankshaft becoming "slower" than
full-codegen on construed corner-cases).

https://codereview.chromium.org/997543002/diff/1/src/hydrogen.cc
File src/hydrogen.cc (left):

https://codereview.chromium.org/997543002/diff/1/src/hydrogen.cc#oldcode12703
src/hydrogen.cc:12703: void
HOptimizedGraphBuilder::GenerateGeneratorNext(CallRuntime* call) {
For posterity: These two might cause troubles, as not even the C++ fallback
implementation if implemented. If they do, we might need to bring back bailouts
for %GeneratorNext and %GeneratorThrow.

[Sven Panne, 2015-03-10 14:58:48]

The CQ bit was checked by svenpanne@chromium.org

[commit-bot: I haz the power, 2015-03-10 14:59:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/997543002/1

[commit-bot: I haz the power, 2015-03-10 15:00:14]

Committed patchset #1 (id:1)

[Sven Panne, 2015-03-10 15:00:29]

On 2015/03/10 13:52:16, Michael Starzinger wrote:
> For posterity: These two might cause troubles, as not even the C++ fallback
> implementation if implemented. If they do, we might need to bring back
bailouts
> for %GeneratorNext and %GeneratorThrow.

As discussed offline: Unless there are some hidden obscure problems in
compiler.cc, this CL should be fine. If this assumption turns out to be wrong,
we can easily revert this CL and have learned something valuable. :-}

[commit-bot: I haz the power, 2015-03-10 15:00:30]

Patchset 1 (id:??) landed as
https://crrev.com/db2d31ab3b8a51eeab1cd2c44dc9bb5151e9af97
Cr-Commit-Position: refs/heads/master@{#27110}