This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug middle-end/32004] [4.3 regression] : gcc.target/i386/pr21291.c
- From: "matz at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 May 2007 08:03:23 -0000
- Subject: [Bug middle-end/32004] [4.3 regression] : gcc.target/i386/pr21291.c
- References: <bug-32004-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from matz at gcc dot gnu dot org 2007-05-21 09:03 -------
Exactly. If during expansion or at some other time before reload, doesn't
matter that much. Of course there's a remote possibility that some RTL
passes between expand and reload would do the copy propagation to counter
that transformation. As inout_2 would have two writes this would require
some data flow analysis in the RTL phase to determine that this copy-prop
is valid. There's hope that this isn't done, so that nobody would destroy
that work-around again :)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32004