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[Bug target/41311] [4.5 regression] m68k - FFmpeg crashes when converting mpg to avi
- From: "ami_stuff at o2 dot pl" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Jan 2010 00:41:57 -0000
- Subject: [Bug target/41311] [4.5 regression] m68k - FFmpeg crashes when converting mpg to avi
- References: <bug-41311-17839@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from ami_stuff at o2 dot pl 2010-01-02 00:41 -------
The problematic function is as was said "ff_rate_estimate_qscale".
I found out which optimizations causes the problem:
-m68020 -m68881 -O1 -fno-tree-ccp -fno-tree-dominator-opts (works ok).
-m68020 -m68881 -O1 ("Abort trap")
I attache output files from GCC 4.5 20091224. Maybe someone will try to create
a simpler testcase for thie bug in the future. GCC 4.4 and all older versions
of GCC works correctly, so bug was introduced in the GCC 4.5 branch (only for
-m68020/30 -m68881, -m68040 & -m68060 seems to be OK).
--
ami_stuff at o2 dot pl changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.5 regression] FFmpeg |[4.5 regression] m68k -
|crashes when converting mpg |FFmpeg crashes when
|to avi |converting mpg to avi
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41311