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Subject: [Bug target/56087] [m68k] gcc miscompiles pari (multiplication)
Date: Wed, 23 Jan 2013 20:04:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D56087

Thorsten Glaser <tg at mirbsd dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Target|                            |m68k-linux-gnu
      Known to work|                            |4.7.2
               Host|                            |x86_64-linux-gnu or
                   |                            |m68k-linux-gnu
      Known to fail|                            |4.6.3
              Build|                            |x86_64-linux-gnu or
                   |                            |m68k-linux-gnu

--- Comment #1 from Thorsten Glaser <tg at mirbsd dot org> 2013-01-23 20:03=
:57 UTC ---
There it works:

root@aranym:~ # gcc-4.7 -c -g -O3 -funroll-loops -S -o testcase.S testcase.=
i &&
fgrep muls testcase.S
        muls.l #954437177,%d2:%d5
root@aranym:~ # gcc-4.7 -v
Using built-in specs.
COLLECT_GCC=3Dgcc-4.7
COLLECT_LTO_WRAPPER=3D/usr/lib/gcc/m68k-linux-gnu/4.7/lto-wrapper
Target: m68k-linux-gnu
Configured with: ../src/configure -v --with-pkgversion=3D'Debian 4.7.2-5'
--with-bugurl=3Dfile:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=3Dc,c++,fortran,objc,obj-c++ --prefix=3D/usr
--program-suffix=3D-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=3D/usr/lib --without-included-gettext
--enable-threads=3Dposix --with-gxx-include-dir=3D/usr/include/c++/4.7
--libdir=3D/usr/lib --enable-nls --with-sysroot=3D/ --enable-clocale=3Dgnu
--enable-libstdcxx-debug --enable-libstdcxx-time=3Dyes --enable-gnu-unique-=
object
--disable-libssp --disable-libitm --enable-plugin --enable-objc-gc
--disable-werror --disable-multilib --enable-checking=3Drelease
--build=3Dm68k-linux-gnu --host=3Dm68k-linux-gnu --target=3Dm68k-linux-gnu
Thread model: posix
gcc version 4.7.2 (Debian 4.7.2-5)

Would still be nice to get a patch for 4.6 which is currently the =E2=80=9C=
workhorse=E2=80=9D
compiler for m68k (lots of use, patches, Ada works, fixes and ports to MiNT=
).