http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35877
Janne Blomqvist <jb at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #6 from Janne Blomqvist <jb at gcc dot gnu.org> 2010-11-02 11:44:22 UTC --- The testcase from #2 with gfortran 4.6 shows No opt: cmplx_test (inf+iNan)*(2/3+i0) ( NaN, NaN) cmplx_test (inf+iNan)*(2/3) ( NaN, NaN) -O3: cmplx_test (inf+iNan)*(2/3+i0) ( NaN, NaN) cmplx_test (inf+iNan)*(2/3) ( NaN, NaN) -O3 -ffast-math: cmplx_test (inf+iNan)*(2/3+i0) ( +Infinity, 0.66666666666666663 ) cmplx_test (inf+iNan)*(2/3) ( +Infinity, 0.66666666666666663 ) Which seems to resolve the issue. Closing.