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[Bug target/31801] [dataflow] undefined reference to `gen_blockage'
- 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: 3 May 2007 21:00:18 -0000
- Subject: [Bug target/31801] [dataflow] undefined reference to `gen_blockage'
- References: <bug-31801-14137@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from pinskia at gcc dot gnu dot org 2007-05-03 22:00 -------
(In reply to comment #2)
> there's no mention of "blockage" in the trunk documentation.
HUH?
@cindex @code{blockage} instruction pattern
@item @samp{blockage}
This pattern defines a pseudo insn that prevents the instruction
scheduler from moving instructions across the boundary defined by the
blockage insn. Normally an UNSPEC_VOLATILE pattern.
Which was added by:
http://gcc.gnu.org/ml/gcc-patches/2007-01/msg02304.html
See also: http://gcc.gnu.org/ml/gcc-patches/2007-02/msg00147.html
Which talks about this change.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31801