[Bug tree-optimization/50693] Loop optimization restricted by GOTOs

[dje at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50693

--- Comment #17 from David Edelsohn <dje at gcc dot gnu.org> 2011-10-11 14:40:09 UTC ---
LLVM appears to be able to recognize memset of any value, not just zero.  And
apparently performs control flow simplification before attempting to recognize
the idiom, so it can expose the loop created by the convoluted GOTOs.