------- Additional Comments From rth at redhat dot com 2004-01-23 08:24 -------
Subject: Re: PR 13722 candidate fix
On Thu, Jan 22, 2004 at 11:43:40PM -0800, Zack Weinberg wrote:
> + out[0] = adjust_automodify_address
> + (in, DImode, gen_rtx_POST_INC (Pmode, base), 0);
> +
> + if (GET_CODE (XEXP (offset, 1)) == REG)
> + {
> + rtx reg = XEXP (offset, 1);
> + /* Tweak the index register, then emit the first move as
> + a POST_INC and the second as the original POST_MODIFY. */
> + emit_insn (GEN_FCN (add_optab->handlers[GET_MODE
> (reg)].insn_code)
> + (reg, reg, GEN_INT (-8)));
You can't modify the POST_MODIFY operand.
You need to modify the address register a third time, ie.
ld8 x = [a], 8
ld8 y = [a], -8
add a = r, a
or
ld8 x = [a], 8
ld8 y = [a], r
adds a = -8, a
r~
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13722
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