Make it inline; add fast checks for ascii letters
and digits; add fallback function that uses the
fastcall calling convention.
On ia32, this change makes isLetterOrNumber ~120x
faster for ascii letters and digits, ~150x faster
for non-letter/digit ascii characters, and ~1.3x
faster for non-ascii characters.
Note that this change is NOT binary compatible.
Also add an autotest with expected results from
before the optimization, to ensure that the
behavior is the same.
Change-Id: Ia4e13692f4dd79f6aa0b96da29449e0487971b0e
Reviewed-on: http://codereview.qt-project.org/4904
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
08d1ca1053