Re: [PATCH, i386] Disable HImode fild insn for TARGET_PARTIAL_REG_STALL

[Uros Bizjak]

Eric Botcazou wrote:

> > For -march=i686, we are expanding function prologue (.c.00.expand) to:
> >
> > ...
> > (insn 7 8 9 0 (set (reg/v:SI 59 [ x ])
> >        (sign_extend:SI (subreg:HI (reg:SI 60) 0))) -1 (nil)
> >    (nil))
> >
> > (note 9 7 10 0 NOTE_INSN_FUNCTION_BEG)
> > ...
> >
> > Note the sign_extend, that is not present for -march=pentium4, where reg
> > 59 is in HImode.
> >    
>
> config/i386/i386.c:549
> const int x86_himode_math = ~(m_PPRO);
>  
Yes, -march=pentium4 is OK, the problem is HImode 'push ax' in PPro case.

Uros.