Viewing file:  reduc-2char.c (1.49 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 121
signed char b[N] = {1,2,3,6,8,10,12,14,16,18,20,22,24,26,28,30};
signed char c[N] = {1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
__attribute__ ((noinline))
void main1 (signed char x, signed char max_result, signed char min_result)
{
int i;
signed char diff = 2;
signed char max = x;
signed char min = x;
for (i = 0; i < N; i++) {
diff += (signed char)(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 ();
}
void __attribute__((noinline))
__attribute__((optimize ("-ftree-parallelize-loops=0")))
init_arrays ()
{
int i;
for (i=16; i<N; i++)
{
b[i] = 1;
c[i] = 1;
}
}
int main (void)
{
init_arrays();
main1 (100, 100, 1);
main1 (0, 15, 0);
return 0;
}
/* { dg-final { scan-tree-dump-times "Detected reduction" 2 "parloops2" } } */
/* { dg-final { scan-tree-dump-times "Detected reduction" 3 "parloops2" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 2 "parloops2" } } */
/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 3 "parloops2" { xfail *-*-* } } } */
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