gcc/testsuite/gcc.dg/vect/bb-slp-layout-9.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-fno-tree-loop-vectorize" } */
   3
   4 int a[4], b[400], c[400], d[40000];
   5
   6 void f1()
   7 {
   8   int a0 = a[0];
   9   int a1 = a[1];
  10   int a2 = a[2];
  11   int a3 = a[3];
  12   for (int i = 0; i < 100; ++i)
  13     {
  14       a0 ^= c[i * 4 + 0];
  15       a1 ^= c[i * 4 + 1];
  16       a2 ^= c[i * 4 + 2];
  17       a3 ^= c[i * 4 + 3];
  18       for (int j = 0; j < 100; ++j)
  19         {
  20           a0 += d[i * 400 + j * 4 + 1];
  21           a1 += d[i * 400 + j * 4 + 0];
  22           a2 += d[i * 400 + j * 4 + 3];
  23           a3 += d[i * 400 + j * 4 + 2];
  24         }
  25       b[i * 4 + 0] = a0;
  26       b[i * 4 + 1] = a1;
  27       b[i * 4 + 2] = a2;
  28       b[i * 4 + 3] = a3;
  29     }
  30   a[0] = a0;
  31   a[1] = a1;
  32   a[2] = a2;
  33   a[3] = a3;
  34 }
  35
  36 /* { dg-final { scan-tree-dump-times "add new stmt: \[^\\n\\r\]* = VEC_PERM_EXPR" 2 "slp1" { target { vect_int && vect_perm } } } } */