Handle all kind of arguments in the ToBooleanStub. While this is not very

Handle all kind of arguments in the ToBooleanStub. While this is not very thrilling in itself, it is one of several steps to add type recording to this stub. Removed a duplicate check for null in the ARM stub and made a tiny simplification, removing a sub instruction.

As a side note, this change has some positive impact on the performace, e.g. imaging-darkroom is 8.3% faster and ws-ieee754conv is even 19.9% faster. No idea why the speedup is so big in some cases, but never look a gift horse in the mouth... ;-)

[Kevin Millikin (Chromium), 2011-05-18 10:31:57]

LGTM.

It's strange that we specialize the stub for argument register on ARM but not
the other platforms (it's mostly a legacy from the classic code generator).  It
would be interesting to investigate whether that helps optimized code or not
enough to make it worth the bother.