gcc/testsuite/gfortran.dg/g77/980519-2.f

   1 c { dg-do compile }
   2 * Date: Fri, 17 Apr 1998 14:12:51 +0200
   3 * From: Jean-Paul Jeannot <jeannot@gx-tech.fr>
   4 * Organization: GX Technology France
   5 * To: egcs-bugs@cygnus.com
   6 * Subject: identified bug in g77 on Alpha
   7 *
   8 * Dear Sir,
   9 *
  10 * You will find below the assembly code of a simple Fortran routine which
  11 * crashes with segmentation fault when storing the first element
  12 *       in( jT_f-hd_T     ) = Xsp
  13 * whereas everything is fine when commenting this line.
  14 *
  15 * The assembly code (generated with
  16 * -ffast-math -fexpensive-optimizations -fomit-frame-pointer -fno-inline
  17 * or with -O5)
  18 * uses a zapnot instruction to copy an address.
  19 * BUT the zapnot parameter is 15 (copuing 4 bytes) instead of 255 (to copy
  20 * 8 bytes).
  21 *
  22 * I guess this is typically a 64 bit issue. As, from my understanding,
  23 * zapnots are used a lot to copy registers, this may create problems
  24 * elsewhere.
  25 *
  26 * Thanks for your help
  27 *
  28 * Jean-Paul Jeannot
  29 *
  30       subroutine simul_trace( in, Xsp, Ysp, Xrcv, Yrcv )
  31
  32 c   Next declaration added on transfer to gfortran testsuite
  33       integer hd_S, hd_Z, hd_T
  34
  35       common /Idim/ jT_f, jT_l, nT, nT_dim
  36       common /Idim/ jZ_f, jZ_l, nZ, nZ_dim
  37       common /Idim/ jZ2_f, jZ2_l, nZ2, nZ2_dim
  38       common /Idim/ jzs_f, jzs_l, nzs, nzs_dim, l_amp
  39       common /Idim/ hd_S, hd_Z, hd_T
  40       common /Idim/ nlay, nlayz
  41       common /Idim/ n_work
  42       common /Idim/ nb_calls
  43
  44       real Xsp, Ysp, Xrcv, Yrcv
  45       real in( jT_f-hd_T : jT_l )
  46
  47       in( jT_f-hd_T     ) = Xsp
  48       in( jT_f-hd_T + 1 ) = Ysp
  49       in( jT_f-hd_T + 2 ) = Xrcv
  50       in( jT_f-hd_T + 3 ) = Yrcv
  51       end