Viewing file:  reduc-2.c (1.17 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 2558400
int b[N];
int c[N];
/* Reduction of signed-int. */
__attribute__ ((noinline))
void main1 (int x, int max_result, int min_result)
{
int i;
int diff = 0;
int max = x;
int min = x;
for (i = 0; i < N; i++) {
diff += (b[i] - c[i]);
}
for (i = 0; i < N; i++) {
max = max < c[i] ? c[i] : max;
}
for (i = 0; i < N; i++) {
min = min > c[i] ? c[i] : min;
}
/* check results: */
if (diff != DIFF)
abort ();
if (max != max_result)
abort ();
if (min != min_result)
abort ();
}
__attribute__((noinline))
void init_arrays ()
{
int i;
b[0] = 1;
c[0] = 1;
for (i=1; i<N; i++)
{
b[i] = i * 3;
c[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" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 4 "parloops2" { xfail *-*-* } } } */
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