adding movz to machine description

["Petar Bajic" <petar.bajic@xxxxxxxxxxxxxxx>]

> ----- Original Message ----- 
> From: "Ian Lance Taylor" <iant@xxxxxxxxxx>
>
> > What do you mean when you say that the instruction is not generated?
> > Your code looks OK.  Look at the .expand debugging dump (use -da to
> > generate all the RTL debugging dump files); do you see the instruction
> > there?  If so, trace it forward to see what happens to it.
> >
> > Ian
>
> It's not generated, like it's not in the asm code. Instead, movsi_insn is
> used and bad asm code is generated.
>
> for c code :
> if (in1 == 0)
>    out = in2;
> return out;
>
> I expect asm to look like this
> lw r2,4(r30)  ; in2
> lw r16,(r30)  ; in1
> movz r1, r2, r16
>
> instead, code looks like this
>
> lw r2,4(r30)
> lw r16,(r30)
> movz r1,r2,r16
> movn r1,r16,r16
>
> expand debug file is in attach, I don't see that movsicc_expand is used...
> (although this is my first time to look at expand files)
> movsicc_insn first appears in short.c.11.ce1
>
> can you see why pattern is not matched with expand?

Attachment: short.c.00.expand
Description: Binary data

Attachment: short.c.11.ce1
Description: Binary data