This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug optimization/13653] [3.3 regression] -O2 -funroll-loop miscompiles POOMA testcase
- From: "gdr at integrable-solutions dot net" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 1 Feb 2004 23:31:56 -0000
- Subject: [Bug optimization/13653] [3.3 regression] -O2 -funroll-loop miscompiles POOMA testcase
- References: <20040112101346.13653.rguenth@tat.physik.uni-tuebingen.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From gdr at integrable-solutions dot net 2004-02-01 23:31 -------
Subject: Re: [3.3 regression] -O2 -funroll-loop miscompiles POOMA testcase
"rguenth at tat dot physik dot uni-tuebingen dot de" <gcc-bugzilla@gcc.gnu.org> writes:
| Ok, I identified gcc (GCC) 3.2.3 as point to which this is a regression by
| running uninclude over the (original array_test1.ii and array_test1_reduced.ii)
| testcases and fixing the contained __builtin_va_* uses (which gcc 3.2 doesn't have).
|
| I also checked the 3.3 and 3.3.2 releases which both contain the bug.
|
| Maybe the regression hunting script can search for a patch between 3.2.3 and 3.3
| on the reduced testcase? I asked Janis to do this.
Woaw, this detective work is quite impressive! Many thanks.
Alas, I cannot hold the release on this bug since it already appeared
in a previous release -- that does not mean it is unimportant (quite
the contrary). We should investigate ways to fix it for 3.3.4 though.
Thanks,
-- Gaby
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13653