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[Bug c/60103] Spurious -Wsequence-point warning with -O1
- From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 10 Feb 2014 22:25:36 +0000
- Subject: [Bug c/60103] Spurious -Wsequence-point warning with -O1
- Auto-submitted: auto-generated
- References: <bug-60103-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60103
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-02-10
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I think the warning isn't spurious and should be output even with -O0. But the
fact that we output the warning with -O is IMHO pure coincidence, we do it only
because we fold away the useless || 0. So the bug is probably in
verify_sequence_points.
Note that C11 still has the notion of sequence point; it's C++11 where it was
renamed to sequenced after/before.