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[Bug middle-end/26528] [4.2 regression] gcc miscompiles FFTW 3.1
- 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: 2 Mar 2006 13:40:51 -0000
- Subject: [Bug middle-end/26528] [4.2 regression] gcc miscompiles FFTW 3.1
- References: <bug-26528-2736@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #5 from pinskia at gcc dot gnu dot org 2006-03-02 13:40 -------
(In reply to comment #4)
> "-O1 -ftree-vrp -finline-functions".
> More to come...
Can you try "-O3 -fwrapv"? It might be the source have undefined code in it
for signed overflow and changes to VRP exposed it.
Also do you know which file is being miscompiled? If so can you attach the
dump generated by doing -O3 -fdump-tree-vrp-details?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26528