[Bug target/43052] Inline memcmp is *much* slower than glibc's

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052

--- Comment #15 from Jan Hubicka <hubicka at ucw dot cz> 2011-07-05 11:08:50 UTC ---
> 
> Do you think you could spin a script which also tests memcmp?
memcmp is different story.  Few years back I rewrote memcpy/memset codegen to
allow choosing
from several basic implementations based on size. The script I attached is
basically
testing the individual algorithm so you can set for each CPU target a table
choosing best
performing one for given size.

memcmp is still produced in very stupid way.  Sane inline implementations of
memcmp are harder than memcpy/memset.  I will try to look into it and how
current recommended codegens look for AMD/Intel chips.

Honza