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Re: [patch] Performance patch for MIPS conditional move in expr.c
On Wed, 2012-11-14 at 12:00 -0800, Andrew Pinski wrote:
> I know exactly where this code comes from; I have looked at the
> benchmark as one of the reason why I add expand_cond_expr_using_cmove
> in the first place. Anyways you should look into removing
> TARGET_PROMOTE_PROTOTYPES because I found that also fixes the problem
> mentioned here.
>
> Thanks,
> Andrew Pinski
Removing TARGET_PROMOTE_PROTOTYPES looks interesting but I don't know if
it is possible for compatibility reasons. I am still looking at my
example though, I see GCC doing:
andi $5,$5,0x1
xori $5,$5,0x1
movz $2,$4,$5
When it should just do:
andi $5,$5,0x1
movn $2,$4,$5
Steve Ellcey
sellcey@mips.com