[Bug c/49820] Explicit check for integer negative after abs optimized away

[sch...@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49820

--- Comment #3 from Andreas Schwab <sch...@linux-m68k.org> 2011-07-23 17:30:21 
UTC ---
Unsigned integers never overflow.