gcc/testsuite/gcc.dg/vect/bb-slp-layout-19.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-fno-tree-loop-vectorize" } */
   3
   4 extern int a[][4], b[][4], c[][4], d[4], e[4];
   5 void f()
   6 {
   7   int t0 = a[0][3];
   8   int t1 = a[1][3];
   9   int t2 = a[2][3];
  10   int t3 = a[3][3];
  11   int a0 = 0, a1 = 0, a2 = 0, a3 = 0, b0 = 0, b1 = 0, b2 = 0, b3 = 0;
  12   for (int j = 0; j < 100; ++j)
  13     for (int i = 0; i < 400; i += 4)
  14       {
  15         a0 += b[i][3] * t0;
  16         a1 += b[i][2] * t1;
  17         a2 += b[i][1] * t2;
  18         a3 += b[i][0] * t3;
  19         b0 += c[i][3] * t0;
  20         b1 += c[i][2] * t1;
  21         b2 += c[i][1] * t2;
  22         b3 += c[i][0] * t3;
  23       }
  24   d[0] = a0;
  25   d[1] = a1;
  26   d[2] = a2;
  27   d[3] = a3;
  28   e[0] = b0;
  29   e[1] = b1;
  30   e[2] = b2;
  31   e[3] = b3;
  32 }
  33
  34 /* On older powerpc hardware (POWER7 and earlier), the default flag
  35    -mno-allow-movmisalign prevents vectorization.  On POWER8 and later,
  36    when vect_hw_misalign is true, vectorization occurs.  For other
  37    targets, ! vect_no_align is a sufficient test.  */
  38
  39 /* { dg-final { scan-tree-dump-times "add new stmt: \[^\\n\\r\]* = VEC_PERM_EXPR" 3 "slp1" { target { { vect_int_mult && vect_perm } && { { ! powerpc*-*-* } || { vect_hw_misalign } } } } } } */