Re: store double-cvtd-to-int to memory

[Dale Johannesen <dalej at apple dot com>]

On Thursday, March 13, 2003, at 02:32  PM, Richard Henderson wrote:

> On Wed, Mar 12, 2003 at 05:45:36PM -0800, Dale Johannesen wrote:
> >   [(set (match_operand:SI 0 "memory_operand" "=m")
> >         (fix:SI (match_operand:DF 1 "gpc_reg_operand" "f")))
> >    (clobber (match_operand:DI 2 "gpc_reg_operand" "=f"))
> >    (clobber (match_operand:DI 3 "memory_operand" "=o"))]
> >
> > where op3 is a stack temp.
>
> Do you actually need the stack temp?  I understood you that
> you didn't need it, because you had an instruction for this
> directly.  If not, just leave it out.

Thanks.
For this case, where the result goes in memory, you don't need a stack 
temp.
For the case where it goes in a register, however, you do.  (It looks 
like
this is not so on Alpha?)  So removing op3 from the above pattern 
results
in another pattern that combine won't generate, because the original
fix_truncdfsi2 pattern does have the temp, and needs it.