[Bug fortran/36214] Wrong simplification of BOZ constants

[kargl at gcc dot gnu dot org]

------- Comment #5 from kargl at gcc dot gnu dot org  2008-09-10 15:42 -------
Daniel, 

I looked at this briefly last week.  Here's another test case that might be
easier to trace.  

   implicit none
   real(4) r
   real(8) rd
   complex(8) z
   rd = 
dble(b'0000000000000000000000000000000001000000001010010101001111111101')
   z  =
cmplx(b'0000000000000000000000000000000001000000001010010101001111111101',0,8)
   r = 0.
   if (z /= rd) call abort
   end

Of course, bugzilla has wrapped the long lines.

-fdump-parse-tree gives
      ASSIGN MAIN__:rd 5.31837115e-315_8
      ASSIGN MAIN__:z (complex 5.3183711317956924e-315_8 0_8)
      ASSIGN MAIN__:r 0
      IF (/= MAIN__:z __convert_r8_c8[[((MAIN__:rd))]])
        CALL _gfortran_abort ()
      ENDIF

I suspect that the conversion of the boz to the rd value is 
done with a kind=4 conversion rather than kind=8, but I haven't
been able to substantial my suspicions.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36214