http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58174
Bug ID: 58174
Summary: gcc miscompiles code
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: galtgendo at o2 dot pl
Created attachment 30665
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30665&action=edit
preprocessed file that miscompiles
Using built-in specs.
COLLECT_GCC=gcc-4.8.1
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.8.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-4.8.1/work/gcc-4.8.1/configure
--prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.8.1
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.1/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.1
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.1/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.1/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.1/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--disable-fixed-point --with-cloog --disable-isl-version-check --enable-lto
--enable-nls --without-included-gettext --with-system-zlib --enable-obsolete
--disable-werror --enable-secureplt --enable-multilib
--with-multilib-list=m32,m64 --enable-libmudflap --disable-libssp
--enable-libgomp
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.8.1/python
--enable-checking=release --disable-libgcj --enable-libstdcxx-time
--enable-objc-gc --enable-languages=c,c++,objc,fortran --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-targets=all --with-bugurl=http://bugs.gentoo.org/
--with-pkgversion='Gentoo 4.8.1 p1.0, pie-0.5.6' --disable-libstdcxx-pch
Thread model: posix
gcc version 4.8.1 (Gentoo 4.8.1 p1.0, pie-0.5.6)
The command:
gc -DHAVE_INTTYPES=1 -O2 -Wall -Wextra -I/usr/include/SDL -I/usr/include/AL
-I/usr/include/libmodplug -o snd_flac.o -c snd_flac.cpp
Notes:
- even '-O' triggers the bug
- at '-O2', for whatever the reason, '-fno-guess-branch-probability' makes
things work
