gcc/testsuite/gcc.dg/vect/bb-slp-layout-11.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-fno-tree-loop-vectorize" } */
   3
   4 int a[4], b[4], c[400], d[400];
   5
   6 void f1()
   7 {
   8   int a0 = a[0] - b[0];
   9   int a1 = a[1] + b[1];
  10   int a2 = a[2] - b[2];
  11   int a3 = a[3] + b[3];
  12   int b0 = a0;
  13   int b1 = a1;
  14   int b2 = a2;
  15   int b3 = a3;
  16   for (int i = 0; i < 100; ++i)
  17     {
  18       a0 += c[i * 4 + 1];
  19       a1 += c[i * 4 + 0];
  20       a2 += c[i * 4 + 3];
  21       a3 += c[i * 4 + 2];
  22       b0 ^= d[i * 4 + 3];
  23       b1 ^= d[i * 4 + 2];
  24       b2 ^= d[i * 4 + 1];
  25       b3 ^= d[i * 4 + 0];
  26     }
  27   a[0] = a0 ^ b0;
  28   a[1] = a1 ^ b1;
  29   a[2] = a2 ^ b2;
  30   a[3] = a3 ^ b3;
  31 }
  32
  33 /* { dg-final { scan-tree-dump-times "add new stmt: \[^\\n\\r\]* = VEC_PERM_EXPR" 4 "slp1" { target { vect_int && vect_perm } } } } */
  34 /* { dg-final { scan-tree-dump "duplicating permutation node" "slp1" { target { vect_int && vect_perm } } } } */