This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: subreg_get_info vs mode restrictions in registers?
On Wed, Jan 24, 2007 at 08:39:47PM -0500, DJ Delorie wrote:
>
> Here's an example of bad assumptions. The current code calculates the
> subreg location BEFORE checking to see if such a subreg is legal.
> This patch moved the legality check before the location calculations.
See also <URL:http://gcc.gnu.org/ml/gcc-patches/2006-12/msg00241.html>.
You probably need to be prepared, whatever that means, for
HARD_REGNO_NREGS() to be called with parameters for which
HARD_REGNO_MODE_OK() returns 0. As you've found out, subreg_get_info() might
do that.
--
Rask Ingemann Lambertsen