gcc/testsuite/gcc.dg/vect/vect-early-break_125-pr114403.c

   1 /* { dg-add-options vect_early_break } */
   2 /* { dg-require-effective-target vect_early_break_hw } */
   3 /* { dg-require-effective-target vect_long_long } */
   4
   5 /* { dg-final { scan-tree-dump "LOOP VECTORIZED" "vect" } } */
   6
   7 #include "tree-vect.h"
   8
   9 long x[9];
  10 long a[20];
  11 struct { long x; long b[40]; } b;
  12 int __attribute__((noipa))
  13 foo (int n)
  14 {
  15   int i = 0;
  16   int k = 0;
  17   do
  18     {
  19       if (x[k++])  // early exit, loop upper bound is 8 because of this
  20         break;
  21       a[i] = b.b[2*i]; // the misaligned 2*i access causes peeling for gaps
  22     }
  23   while (++i < n);
  24   return i;
  25 }
  26
  27 int main()
  28 {
  29   check_vect ();
  30
  31   x[8] = 1;
  32   if (foo (20) != 8)
  33     __builtin_abort ();
  34   return 0;
  35 }
  36