gcc/testsuite/gcc.dg/graphite/run-id-5.c

   1 /* { dg-options "-O2 -ftree-vectorize -fno-vect-cost-model -fno-tree-scev-cprop -fgraphite-identity" } */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 /* gcc.dg/vect/no-scevccp-outer-22.c was miscompiled by Graphite.
   5    Adding it here to always test it with Graphite.  */
   6
   7 #include <stdarg.h>
   8
   9 extern void abort ();
  10 #define N 40
  11
  12 int a[N];
  13
  14 __attribute__ ((noinline)) int
  15 foo (int n){
  16   int i,j;
  17   int sum;
  18
  19   if (n<=0)
  20     return 0;
  21
  22   /* inner-loop index j used after the inner-loop */
  23   for (i = 0; i < N; i++) {
  24     sum = 0;
  25     for (j = 0; j < n; j+=2) {
  26       sum += j;
  27     }
  28     a[i] = sum + j;
  29   }
  30 }
  31
  32 int main (void)
  33 {
  34   int i,j;
  35   int sum;
  36
  37   for (i=0; i<N; i++)
  38     a[i] = i;
  39
  40   foo (N);
  41
  42   /* check results:  */
  43   for (i=0; i<N; i++)
  44     {
  45       sum = 0;
  46       for (j = 0; j < N; j+=2)
  47         sum += j;
  48       if (a[i] != sum + j)
  49         abort();
  50     }
  51
  52   return 0;
  53 }
  54