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[Bug tree-optimization/37449] [4.4 Regression] calculix gets wrong answer for -O1 -ffast-math
- From: "janis at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 9 Sep 2008 23:40:44 -0000
- Subject: [Bug tree-optimization/37449] [4.4 Regression] calculix gets wrong answer for -O1 -ffast-math
- References: <bug-37449-4503@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from janis at gcc dot gnu dot org 2008-09-09 23:40 -------
There's a Heisenbug involved here. A reghunt for failures with "-O1 -ftree-fre
-funsafe-math-optimizations" came up with a nonsensical result, and I can
sometimes get it to fail with only "-O1 -funsafe-math-optimizations".
--
janis at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.4 Regression] calculix |[4.4 Regression] calculix
|gets wrong answer for -O1 - |gets wrong answer for -O1 -
|ftree-pre -ffast-math |ffast-math
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37449