Your change to emit_group_{load,store}

[Aldy Hernandez]

Regarding Pinski's PR: 18163

The problem lies in that the old code was working for the following 
parallel:

(parallel:TF [
        (expr_list:REG_DEP_TRUE (reg:DF 45 f13 [ g ])
            (const_int 0 [0x0]))

Now...can someone tell me what in the world that means?

No, it didn't get corrupted.  For that matter, the PPC back end created
it that way:

	  /* Describe where this piece goes in the fprs.  */
	  r = gen_rtx_REG (fmode, cum->fregno);
	  rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, const0_rtx);

Before I even venture a fix, I'd like to know what the above RTL is
supposed to mean.  Geoff?  David?

Aldy