libgomp/testsuite/libgomp.c/pr46032.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -ftree-vectorize -std=c99 -fipa-pta" } */
   3
   4
   5 extern void abort (void);
   6
   7 #define nEvents 1000
   8
   9 static void __attribute__((noinline, noclone, optimize("-fno-tree-vectorize")))
  10 init (unsigned *results, unsigned *pData)
  11 {
  12   unsigned int i;
  13   for (i = 0; i < nEvents; ++i)
  14     pData[i] = i % 3;
  15 }
  16
  17 static void __attribute__((noinline, noclone, optimize("-fno-tree-vectorize")))
  18 check (unsigned *results)
  19 {
  20   unsigned sum = 0;
  21   for (int idx = 0; idx < (int)nEvents; idx++)
  22     sum += results[idx];
  23
  24   if (sum != 1998)
  25     abort ();
  26 }
  27
  28 int
  29 main (void)
  30 {
  31   unsigned results[nEvents];
  32   unsigned pData[nEvents];
  33   unsigned coeff = 2;
  34
  35   init (&results[0], &pData[0]);
  36
  37 #pragma omp parallel for
  38   for (int idx = 0; idx < (int)nEvents; idx++)
  39     results[idx] = coeff * pData[idx];
  40
  41   check (&results[0]);
  42
  43   return 0;
  44 }