http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51315
--- Comment #1 from Jurij Smakov <jurij at wooyd dot org> 2011-11-28 23:45:19
UTC ---
Debian gcc maintainers suggested that I try to build the test case with various
gcc versions available in Debian and post the results here. Here's a summary:
Debian's gcc-4.4 is not affected:
jurij@debian:~/ftree-sra$ gcc-4.4 -v
Using built-in specs.
Target: sparc-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.4.6-11'
--with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.4 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.4
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-targets=all --with-long-double-128
--enable-checking=release --build=sparc-linux-gnu --host=sparc-linux-gnu
--target=sparc-linux-gnu
Thread model: posix
gcc version 4.4.6 (Debian 4.4.6-11)
jurij@debian:~/ftree-sra$
jurij@debian:~/ftree-sra$ gcc-4.4 -g -O2 -ftree-sra pack.c -o pack
jurij@debian:~/ftree-sra$ ./pack
do_something called with item=-32767
do_something called with item=-123456
jurij@debian:~/ftree-sra$
Debian's gcc-4.5 is not affected:
jurij@debian:~/ftree-sra$ gcc-4.5 -v
Using built-in specs.
COLLECT_GCC=gcc-4.5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/sparc-linux-gnu/4.5.3/lto-wrapper
Target: sparc-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.5.3-9'
--with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.5 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.5
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default
--with-plugin-ld=ld.gold --enable-objc-gc --enable-targets=all
--with-long-double-128 --enable-checking=release --build=sparc-linux-gnu
--host=sparc-linux-gnu --target=sparc-linux-gnu
Thread model: posix
gcc version 4.5.3 (Debian 4.5.3-9)
jurij@debian:~/ftree-sra$
jurij@debian:~/ftree-sra$ gcc-4.5 -g -O2 -ftree-sra pack.c -o pack
jurij@debian:~/ftree-sra$ ./pack
do_something called with item=-32767
do_something called with item=-123456
jurij@debian:~/ftree-sra$
Debian's gcc-snapshot is affected:
jurij@debian:~/ftree-sra$ export PATH=/usr/lib/gcc-snapshot/bin:${PATH}
jurij@debian:~/ftree-sra$ which gcc
/usr/lib/gcc-snapshot/bin/gcc
jurij@debian:~/ftree-sra$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/sparc-linux-gnu/4.7.0/lto-wrapper
Target: sparc-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 20111103-1'
--with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,java,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --enable-shared --enable-linker-build-id
--with-system-zlib --disable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --disable-browser-plugin
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.7-snap/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.7-snap
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.7-snap
--with-arch-directory=sparc --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-targets=all --with-long-double-128 --disable-werror
--enable-checking=yes --build=sparc-linux-gnu --host=sparc-linux-gnu
--target=sparc-linux-gnu
Thread model: posix
gcc version 4.7.0 20111103 (experimental) [trunk revision 180824] (Debian
20111103-1)
jurij@debian:~/ftree-sra$ gcc -g -O2 -ftree-sra pack.c -o pack
jurij@debian:~/ftree-sra$ ./pack
do_something called with item=-32767
Bus error
jurij@debian:~/ftree-sra$ gcc -g -O2 -fno-tree-sra pack.c -o pack
jurij@debian:~/ftree-sra$ ./pack
do_something called with item=-32767
do_something called with item=-123456
jurij@debian:~/ftree-sra$
