[Bug middle-end/58981] [4.9 Regression] FAIL: gcc.target/i386/memset-1.c execution test

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58981

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
A testcase for memcpy:

[hjl@gnu-32 gcc]$ cat /tmp/memcpy-2.c 
/* { dg-do run } */
/* { dg-options "-O2 -minline-all-stringops" } */

extern void abort (void);
extern void exit (int);

#define MAX_OFFSET (sizeof (long long))
#define MAX_COPY (8 * sizeof (long long))
#define MAX_EXTRA (sizeof (long long))

#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[MAX_LENGTH];

main ()
{
  int off, len, i;
  char *p, *q;

  for (i = 0; i < MAX_LENGTH; i++)
    A[i] = 'A';

  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 = __builtin_memcpy (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 ();
      }

  exit(0);
}

[hjl@gnu-32 gcc]$ ./xgcc -B./ -O2 -mx32 /tmp/memcpy-2.c -minline-all-stringops
[hjl@gnu-32 gcc]$ ./a.out 
Segmentation fault
[hjl@gnu-32 gcc]$