Viewing file:  ivopts-lower_base.c (1.39 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-ivopts-details" } */
#include <string.h>
#include <stdlib.h>
#define MAX_NUM (256)
void
sort_pointers (size_t n, void **pointers, void **work)
{
typedef unsigned char digit_t;
unsigned int count[MAX_NUM];
int big_endian_p;
size_t i;
size_t j;
if ((sizeof (void *) / sizeof (digit_t)) % 2 != 0)
abort ();
for (i = 0, j = 0; i < sizeof (size_t); ++i)
{
j *= MAX_NUM;
j += i;
}
big_endian_p = (((char *)&j)[0] == 0);
for (i = 0; i < sizeof (void *) / sizeof (digit_t); ++i)
{
digit_t *digit;
digit_t *bias;
digit_t *top;
unsigned int *countp;
void **pointerp;
if (big_endian_p)
j = sizeof (void *) / sizeof (digit_t) - i;
else
j = i;
memset (count, 0, MAX_NUM * sizeof (unsigned int));
bias = ((digit_t *) pointers) + j;
top = ((digit_t *) (pointers + n)) + j;
for (digit = bias;
digit < top;
digit += sizeof (void *) / sizeof (digit_t))
++count[*digit];
for (countp = count + 1; countp < count + MAX_NUM; ++countp)
*countp += countp[-1];
for (pointerp = pointers + n - 1; pointerp >= pointers; --pointerp)
work[--count[((digit_t *) pointerp)[j]]] = *pointerp;
pointerp = pointers;
pointers = work;
work = pointerp;
}
}
/* { dg-final { scan-tree-dump-not "base \[^\\n\]*&MEM\\\[" "ivopts" } } */
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