gcc/testsuite/gcc.dg/pr47917.c

   1 /* PR middle-end/47917 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fdump-tree-optimized" } */
   4
   5 extern int snprintf (char *, __SIZE_TYPE__, const char *, ...);
   6 extern int memcmp (const void *, const void *, __SIZE_TYPE__);
   7 extern void abort (void);
   8
   9 char buf1[6], buf2[6], buf3[4], buf4[4];
  10 int i;
  11
  12 int
  13 foo (void)
  14 {
  15   int ret = snprintf (buf1, sizeof buf1, "abcde");
  16   ret += snprintf (buf2, sizeof buf2, "abcdef") * 16;
  17   ret += snprintf (buf3, sizeof buf3, "%s", i++ < 6 ? "abc" : "def") * 256;
  18   ret += snprintf (buf4, sizeof buf4, "%s", i++ > 10 ? "abcde" : "defgh") * 4096;
  19   return ret;
  20 }
  21
  22 int
  23 main (void)
  24 {
  25   if (foo () != 5 + 6 * 16 + 3 * 256 + 5 * 4096)
  26     abort ();
  27   if (memcmp (buf1, "abcde", 6) != 0
  28       || memcmp (buf2, "abcde", 6) != 0
  29       || memcmp (buf3, "abc", 4) != 0
  30       || memcmp (buf4, "def", 4) != 0
  31       || i != 2)
  32     abort ();
  33   return 0;
  34 }
  35
  36 /* { dg-final { scan-tree-dump-times "snprintf" 2 "optimized" } } */
  37 /* { dg-final { scan-tree-dump-times "sprintf" 0 "optimized" } } */