Viewing file:  pr65947-9.c (1.45 KB) -rw-r--r--
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/* { dg-require-effective-target vect_condition } */
#include "tree-vect.h"
extern void abort (void) __attribute__ ((noreturn));
#define N 255
/* Condition reduction with maximum possible loop size. Will fail to
vectorize because the vectorisation requires a slot for default values. */
signed char __attribute__((noinline,noclone))
condition_reduction (signed char *a, signed char min_v)
{
signed char last = -72;
for (int i = 0; i < N; i++)
if (a[i] < min_v)
last = a[i];
return last;
}
int
main ()
{
signed char a[N] = {
11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
31, 32
};
__builtin_memset (a+32, 43, N-32);
check_vect ();
signed char ret = condition_reduction (a, 16);
if (ret != 10)
abort ();
ret = condition_reduction (a, 1);
if (ret != -72)
abort ();
return 0;
}
/* { dg-final { scan-tree-dump-not "LOOP VECTORIZED" "vect" { target { ! vect_fold_extract_last } } } } */
/* { dg-final { scan-tree-dump-times "LOOP VECTORIZED" 1 "vect" { target vect_fold_extract_last } } } */
/* { dg-final { scan-tree-dump "loop size is greater than data size" "vect" { target { ! vect_fold_extract_last } } } } */
/* { dg-final { scan-tree-dump-times "optimizing condition reduction with FOLD_EXTRACT_LAST" 1 "vect" { target vect_fold_extract_last } } } */
/* { dg-final { scan-tree-dump-not "condition expression based on integer induction." "vect" } } */
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