Viewing file:  reduc-1.c (1.29 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops2-details -fdump-tree-optimized" } */
#include <stdarg.h>
#include <stdlib.h>
#define N 1600
#define DIFF 2558402
unsigned int ub[N];
unsigned int uc[N];
/* Reduction of unsigned-int. */
void main1 (unsigned int x, unsigned int max_result, unsigned int min_result)
{
int i;
unsigned int udiff = 2;
unsigned int umax = x;
unsigned int umin = x;
/* Summation. */
for (i = 0; i < N; i++) {
udiff += (ub[i] - uc[i]);
}
/* Maximum. */
for (i = 0; i < N; i++) {
umax = umax < uc[i] ? uc[i] : umax;
}
/* Minimum. */
for (i = 0; i < N; i++) {
umin = umin > uc[i] ? uc[i] : umin;
}
/* check results: */
if (udiff != DIFF)
abort ();
if (umax != max_result)
abort ();
if (umin != min_result)
abort ();
}
__attribute__((noinline))
void init_arrays ()
{
int i;
ub[0] = 1;
uc[0] = 1;
for (i=1; i<N; i++)
{
ub[i] = i * 3;
uc[i] = i;
}
}
int main (void)
{
init_arrays ();
main1 (2000, 2000, 1);
main1 (0, 1599, 0);
return 0;
}
/* { dg-final { scan-tree-dump-times "Detected reduction" 3 "parloops2" } } */
/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 4 "parloops2" } } */
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