LIR misses out on arrays

Bugzilla Link	1189
Created on	Mar 07, 2017 20:20
Version	svn
OS	Linux
Architecture	PC
Attachments	bug2.sac

Extended Description

Created an attachment (id=1059)
source code to reproduce failure
In my local Build:  sac2c -V
sac2c 1.2-beta-BlackForest-400-g48da-dirty
build-type: DEBUG
built-by: "sac" at 2017-03-06T17:21:34
I observed the following, compiling with default options:
bool[20] _MAIN::_dup_863_main__Loop_0( bool[20] _dup_3532_Zrow { ,NN } , int colx { ,NN } )
/*
 *  _dup_863_main__Loop_0 ::  ---
 */
{
  int _al_868 { , NN } ;
  int _pinl_547__flat_32 { , NN } ;
  bool _pinl_548__flat_67 { , NN } ;
  bool[20] Crow__SSA0_3 { , NN } ;
  bool[20] Crow__SSA0_2 { , NN } ;
  _pinl_547__flat_32 = _add_SxS_( 1, colx);
  _al_868 = _add_SxS_( -19, colx);
  _pinl_548__flat_67 = _lt_SxS_( _al_868, 0);
  if (_pinl_548__flat_67)
  {
    Crow__SSA0_2 = _MAIN::_dup_863_main__Loop_0( _dup_3532_Zrow, _pinl_547__flat_32) ;
  }
  else
  {
  }
  Crow__SSA0_3 = ( _pinl_548__flat_67 ? Crow__SSA0_2 : _dup_3532_Zrow );
  return( Crow__SSA0_3);
}
Note that _dup_3532_Zrow is loop-invariant, yet it does not get lifted
out of the loop.
I am looking into this now.