------- Comment #2 from hjl dot tools at gmail dot com  2008-09-04 16:13 -------
(In reply to comment #1)
> "-O2 -march=core2 -fno-ira -fno-regmove" generates
> 
>         movq    x(%rip), %mm0
>         paddd   y(%rip), %mm0
>         movq    %mm0, -8(%rsp)
>         movq    -8(%rsp), %rax
> 
> It seems that regmove isn't effective for IRA.
> 

regmove is turned off for IRA. Revert the regmove.c change in
revision 139590

        * regmove.c (regmove_optimize): Don't do replacement of output for
        IRA.

fixes this regression. Vladimir, IRA should either deal with replacement
of output or let regmove handle it.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37364

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