[Bug tree-optimization/44632] [4.4/4.5/4.6 regression] wrong code for complex division

["dave at hiauly1 dot hia dot nrc dot ca" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #16 from dave at hiauly1 dot hia dot nrc dot ca  2010-08-09 11:44 -------
Subject: Re:  [4.4/4.5/4.6 regression] wrong

> The following might be a regression:
> Executing on host: /home/dave/gnu/gcc/objdir/./gcc/g++ -shared-libgcc -B/ho=
> me/dave/gnu/gcc/objdir/./gcc -nostdinc++ -L/home/dave/gnu/gcc/objdir/hppa-l=
> inux/libstdc++-v3/src -L/home/dave/gnu/gcc/objdir/hppa-linux/libstdc++-v3/s=
> rc/.libs -B/home/dave/opt/gnu/gcc/gcc-4.6.0/hppa-linux/bin/ -B/home/dave/op=
> t/gnu/gcc/gcc-4.6.0/hppa-linux/lib/ -isystem /home/dave/opt/gnu/gcc/gcc-4.6=
> =2E0/hppa-linux/include -isystem /home/dave/opt/gnu/gcc/gcc-4.6.0/hppa-linu=
> x/sys-include -B/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.li=
> bs -g -O2 -D_GLIBCXX_ASSERT -fmessage-length=3D0 -ffunction-sections -fdata=
> -sections -g -O2 -D_GNU_SOURCE -g -O2 -D_GNU_SOURCE -DLOCALEDIR=3D"." -nost=
> dinc++ -I/home/dave/gnu/gcc/objdir/hppa-linux/libstdc++-v3/include/hppa-lin=
> ux -I/home/dave/gnu/gcc/objdir/hppa-linux/libstdc++-v3/include -I/home/dave=
> /gnu/gcc/gcc/libstdc++-v3/libsupc++ -I/home/dave/gnu/gcc/gcc/libstdc++-v3/i=
> nclude/backward -I/home/dave/gnu/gcc/gcc/libstdc++-v3/testsuite/util /home/=
> dave/gnu/gcc/gcc/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_=
> functions/01_assoc_laguerre/check_nan.cc    -include bits/stdc++.h ./libtes=
> tc++.a -Wl,--gc-sections  -lm   -o ./check_nan.exe    (timeout =3D 600)
> In file included from /home/dave/gnu/gcc/objdir/hppa-linux/libstdc++-v3/inc=
> lude/tr1/cmath:95:0,                 from /home/dave/gnu/gcc/gcc/libstdc++-=
> v3/testsuite/tr1/5_numerical_facilities/special_functions/01_assoc_laguerre=
> /check_nan.cc:25:/home/dave/gnu/gcc/objdir/hppa-linux/libstdc++-v3/include/=
> tr1/poly_laguerre.tcc: In function '_Tp std::tr1::__detail::__poly_laguerre=
> _large_n(unsigned int, _Tpa, _Tp) [with _Tpa =3D unsigned int, _Tp =3D floa=
> t]':/home/dave/gnu/gcc/objdir/hppa-linux/libstdc++-v3/include/tr1/poly_lagu=
> erre.tcc:106:5: internal compiler error: in simplify_subreg, at simplify-rt=
> x.c:5129

No, it is present without change.

Should the fix be backported?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44632