gcc 4.2 branch and gcc 4.3 SVN snapshot seems to miscompile MPlayer's mp_msg.c
resulting in a crash. gcc 3.4.6 is ok. During compilation no warning is issued.
Gcc tested is :
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/cartman/gcc_4.2
--enable-clocale=gnu --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-languages=c,c++ --disable-nls
Thread model: posix
gcc version 4.2.0 20061217 (prerelease)
I will attach two files:
mp_msg_compiled_with_O1_crashes.i produced with :
cc -O1 -Wdeclaration-after-statement -march=pentium-m -mtune=pentium-m -pipe
-ffast-math -fomit-frame-pointer -D_REENTRANT -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -I/usr/include -I/usr/include/
-I/usr/include/SDL -D_REENTRANT -I/usr/include -I/usr/include/dvdnav
-I/usr/include/freetype2 -I. -I./libavutil -I./libavcodec -c -save-temps
mp_msg.c
mp_msg_compiled_with_O0_works.i produced with:
cc -O0 -Wdeclaration-after-statement -march=pentium-m -mtune=pentium-m -pipe
-ffast-math -fomit-frame-pointer -D_REENTRANT -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -I/usr/include -I/usr/include/
-I/usr/include/SDL -D_REENTRANT -I/usr/include -I/usr/include/dvdnav
-I/usr/include/freetype2 -I. -I./libavutil -I./libavcodec -c -save-temps
mp_msg.c
--
Summary: [4.2/4.3] Gcc miscompiles MPlayer when any optimization
is used
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ismail at pardus dot org dot tr
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30247
