[Bug rtl-optimization/34011] Memory load is not eliminated from tight vectorized loop

[ubizjak at gmail dot com]

------- Comment #2 from ubizjak at gmail dot com  2009-09-12 19:25 -------
The testcase does not verctorize anymore, even in the modified form:

--cut here--
const int srcshift;

void good (int *restrict srcdata, int *restrict dstdata)
{
  int i;

  for (i = 0; i < 256; i++)
    dstdata[i] = srcdata[i] << srcshift;
}


void bad (int *restrict srcdata, int *restrict dstdata)
{
  int i;

  for (i = 0; i < 256; i++)
    {
      dstdata[i] |= srcdata[i] << srcshift;
    }
}
--cut here--


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34011