RTL generation patterns

[Jan Hubicka]

> Just to check myself:
> Isn't 
> 
> 	mem/f:SI (plus:SI (reg:SI 28)
>                  (const_int -16 [0xfffffff0])) 0)
> 
> just a simple 'indexed' location like :
> 	insn -16(Rn), Rm
> ('insn' content of memory pointed by Rn-16 to Rm) ?

It is.
> 
> I think, if legitimate_address_p returns true for operands which satisfy:
> 	GET_CODE(x)==PLUS && REG_P(XEXP(x,0)) && GET_CODE(XEXP(x,1)) == CONST_INT
> this is.

Yes, but I guess it goes other way around - it sees operand (const_int 1)
and decides to load that one into register first. See beggining of emit_move_insn
and force_reg calls. It does so to help optimizations.

Honza
> Am I wrong?
> 
> ~d
> 
> > Honza
> > > 
> > > regards,
> > > danish
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