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Date: Wed, 07 Nov 2007 17:54:00 -0000
Subject: [Bug tree-optimization/34017]  New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear
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Test 445.gobmk in SPEC CPU2006 fails to build on powerpc64-linux with "-m64 -O2
-ftree-loop-linear" due to an ICE in lambda_loopnest_to_gcc_loopnest, at
lambda-code.c:1840.  This test case demonstrates the problem:

extern int size;
struct data2 { };
struct data1 { int origin; };
static void
print (struct data1 *d1, struct data2 *d2)
{
  int m, n;
  int mini, maxi;
  int minj, maxj;
  int origin = d1[0].origin;
  minj = size;
  for (m = 0; m < size; m++)
    for (n = 0; n < size; n++)
      {
        if (d1[21 + m * 20 + n].origin != origin)
          continue;
        if (m > maxi)
          maxi = m;
        if (n < minj)
          minj = n;
      }
  for (m = mini; m <= maxi; m++)
    {
      for (n = minj; n <= maxj; n++)
        {
        }
    }
}
void
compute (struct data1 *d1, struct data2 d2[400])
{
  print (d1, d2);
}

The failure begins with:

    http://gcc.gnu.org/viewcvs?view=rev&rev=114205
    r114205 | spop | 2006-05-29 16:01:16 +0000 (Mon, 29 May 2006)


-- 
           Summary: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-
                    loop-linear
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017