libgomp/testsuite/libgomp.c/parloops-exit-first-loop-alt-7.c

   1 /* { dg-do run } */
   2 /* { dg-additional-options "-ftree-parallelize-loops=2" } */
   3
   4 /* Variable bound, vector addition, signed loop counter, signed bound.  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #define N 1000
  10
  11 unsigned int a[N];
  12 unsigned int b[N];
  13 unsigned int c[N];
  14
  15 void __attribute__((noclone,noinline))
  16 f (int n, unsigned int *__restrict__ a, unsigned int *__restrict__ b,
  17    unsigned int *__restrict__ c)
  18 {
  19   int i;
  20
  21   for (i = 0; i < n; ++i)
  22     c[i] = a[i] + b[i];
  23 }
  24
  25 static void __attribute__((noclone,noinline))
  26 init (void)
  27 {
  28   int i, j;
  29
  30   /* Complexify loop to inhibit parloops.  */
  31   for (j = 0; j < 100; ++j)
  32     for (i = 0; i < 10; i++)
  33       {
  34         int k = i + (10 * j);
  35         a[k] = k;
  36         b[k] = (k * 3) % 7;
  37         c[k] = k * 2;
  38       }
  39 }
  40
  41 int
  42 main (void)
  43 {
  44   int i;
  45
  46   init ();
  47
  48   f (N, a, b, c);
  49
  50   for (i = 0; i < N; i++)
  51     {
  52       unsigned int actual = c[i];
  53       unsigned int expected = i + ((i * 3) % 7);
  54       if (actual != expected)
  55         abort ();
  56     }
  57
  58   /* Test low iteration count case.  */
  59
  60   init ();
  61
  62   f (10, a, b, c);
  63
  64   for (i = 0; i < N; i++)
  65     {
  66       unsigned int actual = c[i];
  67       unsigned int expected = (i < 10
  68                                ? i + ((i * 3) % 7)
  69                                : i * 2);
  70       if (actual != expected)
  71         abort ();
  72     }
  73
  74   return 0;
  75 }