DFR appears not to be working

Bugzilla Link	983
Created on	Jun 19, 2012 19:08
Resolution	FIXED
Resolved on	Sep 29, 2017 15:02
Version	svn
OS	Linux
Architecture	PC

Extended Description

One of the CF unit tests now crashes in the -NOCF mode:
sac2c -V
sac2c v1.00-beta (Haggis And Apple)
 developer rev 17951:MODIFIED linux-gnu_x86_64
 (Tue Jun 19 13:34:21 EDT 2012 by sac)
cd ~/sac/testsuite/optimizations/constantfolding
sac2c SCSprf_toi.sac -v0   -maxwlur 1 -doawlf -v4 -noewlcf -nocf 
gets a segfault from running out of memory. What seems to be happening
is that the code volume grows on each iteration (also slowing things down
a whole lot), and we end up with many copies of dead Loop() functions.
The code is fairly simple:   cat SCSprf_toi.sac 
/* Unit test for SCSprf_toi() */
/* RESULT:  _toi_S_ 1 0  -maxwlur 1  */
/* FILTER: no-no */
int main ()
{
  x = 0;
   for (ib=0; _le_SxS_( ib, 3); ib = _add_SxS_( ib, 1)){
      x = with { ([0] <= [ix] <= [8])
           /* CF should make this toi go away */ 
           : _toi_S_( _mul_SxS_( 2, _div_SxS_( ix, 2))); }  
           : genarray([9], 0);
  }
  z = _sel_VxA_([7], x);
  z = _sub_SxS_(z, 6);
  return(z);
}