------- Additional Comments From swanson at ukfsn dot org  2008-10-12 13:25 
-------
Sorry but how can PROCESSOR_UNKNOWN mean it can run any instructions? It's
unknown! Therefore we must use lowest common denominator to expect it to work on
all CPUs.

Tune means scheduling.
Arch means instructions.

Test case. Pass -march=i486 and -mtune=i686 and it'll use alt_long_patt which
won't work on i486. Fail.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6957

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