[Bug tree-optimization/49715] Could do more efficient unsigned-to-float to conversions based on range information

[sgunderson at bigfoot dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49715

--- Comment #3 from sgunderson at bigfoot dot com 2011-07-12 15:19:51 UTC ---
Wow, answer in record time :-)

I don't know anything about GCC internals, so I can't comment much on the
patch; my only worry here is what would happen if you had a very narrow mask,
e.g. (x & 0xf) and you try to coerce it into the minimum possible type (a
char); wouldn't you end up doing some sort of expansion with movzbl again?