ipbdAKD.sac peformance problems w/ AWLF, extrema

Bugzilla Link	710
Created on	May 14, 2010 14:11
Version	svn
OS	Linux
Architecture	PC
Attachments	crud.sac, xcrud.sac, crud.ecclir.gz

Extended Description

Created an attachment (id=712)
source code to reproduce fault
Recent code changes on rattler, either due to my AWLF/extrema work, the WLBSC
changes of yesterday, other repository changes, or some combination thereof,
have clobbered the performance of some APEX benchmarks. The Boolean-double
matrix product ipbdAKD is typical of these. 
The Loop_1 function contains this unpleasantness:
  _ivesplit_16330 = 0;
  _ivesplit_16331 = 1;
  _ = with {
        ([ 0 ] <= _pinl_9242_iv=[_eat_11993] (IDXS:_wlidx_16309__pinl_9233__icc_4507) < [ _uprf_12172 ])
        {
          _pinl_9243_new_idx = _cat_VxV_( row, _pinl_9242_iv);
          _uprf_12161 = _idx_sel_( _ivesplit_16330, _pinl_9243_new_idx);
          _uprf_12166 = _idx_sel_( _ivesplit_16331, _pinl_9243_new_idx);
          _ivesplit_16332 = _idxs2offset_( _isaa_12791_x, _uprf_12161, _uprf_12166);
          _pinl_9232__icc_4505 = _idx_sel_( _ivesplit_16332, x);
        } : _pinl_9232__icc_4505 ;
 } :
      genarray( [ _uprf_12172 ], _pinl_9241__flat_68, IDX(_wlidx_16309__pinl_9233__icc_4507));
  _ivesplit_16333 = colx;
  _pinl_9276__icc_3294 = _idx_sel_( _ivesplit_16333, _pinl_9233__icc_4507);
Note that:
1. _pinl_9233__icc_4507 is copying a row from x.
2. The following reference to that result selects a single element from
   that row.
I'll try to come up a short example of this, but the code base
exists only on rattler at this juncture, so you won't easily be able to
try it.