This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Modes with no registers
- From: Paolo Bonzini <bonzini at gnu dot org>
- To: GCC Development <gcc at gcc dot gnu dot org>
- Date: Sat, 17 Jul 2004 00:17:48 +0200
- Subject: Modes with no registers
How do I distinguish "fake" modes that are only used within a pattern,
from "real" modes that have registers? Is it good design to do this
test in tree.c and to use BLKmode if the mode is only an artifact of the
machine description?
(On x86 I got this problem is with vector modes: V8SI is only used to
describe high multiplication of V8HI operands).
Paolo