contrib/gcc/struct-equiv.c

593 	rtx x_inner, y_inner;
600 	y_inner = XEXP (y, 0);
601 	if (GET_MODE (x_inner) != GET_MODE (y_inner))
604 	if (code != GET_CODE (y_inner))
610 	    if (SUBREG_BYTE (x_inner) != SUBREG_BYTE (y_inner))
614 	    y_inner = SUBREG_REG (y_inner);
615 	    if (GET_MODE (x_inner) != GET_MODE (y_inner))
618 	    if (code != GET_CODE (y_inner))
624 	if (! rtx_equiv_p (&XEXP (x, 0), y_inner, rvalue, info))
626 	if (REGNO (x_inner) == REGNO (y_inner))
632 	  change = note_local_live (info, x_inner, y_inner, 1);