gcc/testsuite/gcc.dg/vect/bb-slp-pr98854.c

   1 /* { dg-do compile } */
   2
   3 double a[1024];
   4
   5 int bar();
   6 void foo (int n)
   7 {
   8   double x = 0, y = 0;
   9   int i = 1023;
  10   do
  11     {
  12       x += a[i] + a[i+1];
  13       y += a[i] / a[i+1];
  14       if (bar ())
  15         break;
  16     }
  17   while (--i);
  18   /* We want to avoid vectorizing the LC PHI and insert vector CTORs
  19      inside of the loop where it is only needed here.  */
  20   a[0] = x;
  21   a[1] = y;
  22 }
  23
  24 /* { dg-final { scan-tree-dump-not "vectorizing SLP node starting from: ._\[0-9\]+ = PHI" "slp1" } } */