modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/builtins/strlen-2.c (about)

     1  /* Copyright (C) 2003  Free Software Foundation.
     2  
     3     Test strlen optimizations on conditional expressions.
     4        
     5     Written by Jakub Jelinek, June 23, 2003.  */
     6  
     7  typedef __SIZE_TYPE__ size_t;
     8  extern size_t strlen (const char *);
     9  extern char *strcpy (char *, const char *);
    10  extern int memcmp (const void *, const void *, size_t);
    11  extern void abort (void);
    12  extern int inside_main;
    13  
    14  size_t g, h, i, j, k, l;
    15  
    16  size_t
    17  foo (void)
    18  {
    19    if (l)
    20      abort ();
    21    return ++l;
    22  }
    23  
    24  void
    25  main_test (void)
    26  {
    27    if (strlen (i ? "foo" + 1 : j ? "bar" + 1 : "baz" + 1) != 2)
    28      abort ();
    29    if (strlen (g++ ? "foo" : "bar") != 3 || g != 1)
    30      abort ();
    31    if (strlen (h++ ? "xfoo" + 1 : "bar") != 3 || h != 1)
    32      abort ();
    33    if (strlen ((i++, "baz")) != 3 || i != 1)
    34      abort ();
    35    /* The following calls might not optimize strlen call away.  */
    36    inside_main = 0;
    37    if (strlen (j ? "foo" + k++ : "bar" + k++) != 3 || k != 1)
    38      abort ();
    39    if (strlen (foo () ? "foo" : "bar") != 3 || l != 1)
    40      abort ();
    41  }