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[Bug target/7282] unrecognizable insn
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Sep 2008 22:13:17 -0000
- Subject: [Bug target/7282] unrecognizable insn
- References: <bug-7282-1057@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #9 from pinskia at gcc dot gnu dot org 2008-09-15 22:13 -------
I wonder if this changed really with:
/* Subregs involving floating point modes are not allowed to
change size. Therefore (subreg:DI (reg:DF) 0) is fine, but
(subreg:SI (reg:DF) 0) isn't. */
In validate_subreg.
Or even:
/* For hard registers, we already have most of these rules collected in
subreg_offset_representable_p. */
Which uses CANNOT_CHANGE_MODE_CLASS.
So this subreg can never show up any more.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7282