The inlining does not seem to actually improve performance, and hence outlining makes the code a bit more readable.

Performance + binary size appear to be at least as good as with inlining. On gcc I get several 10kBs savings in binary size, but only ~100B on clang. In no case have I observed a performance regression.

R=marja@chromium.org
BUG=v8:3437

Review-Url: https://codereview.chromium.org/2611993002
Cr-Commit-Position: refs/heads/master@{#42276}