Viewing file:  memset-1.c (1.89 KB) -rw-r--r--
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/* Copyright (C) 2002, 2005 Free Software Foundation.
Test -minline-all-stringops memset with various combinations of pointer
alignments and lengths to make sure builtin optimizations are correct.
PR target/6456.
Written by Michael Meissner, March 9, 2002.
Target by Roger Sayle, April 25, 2002. */
/* { dg-do run } */
/* { dg-options "-O2 -minline-all-stringops" } */
extern void *memset (void *, int, __SIZE_TYPE__);
extern void abort (void);
extern void exit (int);
#ifndef MAX_OFFSET
#define MAX_OFFSET (sizeof (long long))
#endif
#ifndef MAX_COPY
#define MAX_COPY (8 * sizeof (long long))
#endif
#ifndef MAX_EXTRA
#define MAX_EXTRA (sizeof (long long))
#endif
#define MAX_LENGTH (MAX_OFFSET + MAX_COPY + MAX_EXTRA)
static union {
char buf[MAX_LENGTH];
long long align_int;
long double align_fp;
} u;
char A = 'A';
int
main ()
{
int off, len, i;
char *p, *q;
for (off = 0; off < MAX_OFFSET; off++)
for (len = 1; len < MAX_COPY; len++)
{
for (i = 0; i < MAX_LENGTH; i++)
u.buf[i] = 'a';
p = memset (u.buf + off, '\0', len);
if (p != u.buf + off)
abort ();
q = u.buf;
for (i = 0; i < off; i++, q++)
if (*q != 'a')
abort ();
for (i = 0; i < len; i++, q++)
if (*q != '\0')
abort ();
for (i = 0; i < MAX_EXTRA; i++, q++)
if (*q != 'a')
abort ();
p = memset (u.buf + off, A, len);
if (p != u.buf + off)
abort ();
q = u.buf;
for (i = 0; i < off; i++, q++)
if (*q != 'a')
abort ();
for (i = 0; i < len; i++, q++)
if (*q != 'A')
abort ();
for (i = 0; i < MAX_EXTRA; i++, q++)
if (*q != 'a')
abort ();
p = memset (u.buf + off, 'B', len);
if (p != u.buf + off)
abort ();
q = u.buf;
for (i = 0; i < off; i++, q++)
if (*q != 'a')
abort ();
for (i = 0; i < len; i++, q++)
if (*q != 'B')
abort ();
for (i = 0; i < MAX_EXTRA; i++, q++)
if (*q != 'a')
abort ();
}
exit(0);
}
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