1  /* Verify that constants in memory, referenced only by dead code,
       2     are not emitted to the object file.
       3     FIXME: Not presently possible to apply -pedantic to code with
       4     complex constants in it.  The __extension__ should shut up the
       5     warning but doesn't.  (Hard to fix -- the lexer is not aware of
       6     the parser's state.)  */
       7  
       8  /* { dg-do compile } */
       9  /* { dg-options "-O2 -std=c99" } */
      10  /* { dg-final { scan-assembler-not "L\\\$?C\[^A-Z\]" } } */
      11  
      12  #define I (__extension__ 1.0iF)
      13  
      14  struct S { int a; double b[2]; void *c; };
      15  
      16  extern void use_str(const char *);
      17  extern void use_S(const struct S *);
      18  extern void use_cplx(__complex__ double);
      19  
      20  static inline int
      21  returns_23(void) { return 23; }
      22  
      23  void
      24  test1(void)
      25  {
      26  	if (returns_23() == 23)
      27  		return;
      28  
      29  	use_str("waltz, nymph, for quick jigs vex bud");
      30  	use_S(&(const struct S){12, {3.1415, 2.1828}, 0 });
      31  	use_cplx(3.1415 + 2.1828*I);
      32  }
      33  
      34  void
      35  test2(void)
      36  {
      37  	const char *str = "pack my box with five dozen liquor jugs";
      38  	const struct S S = { 23, { 1.414, 1.618 }, 0 };
      39  	const __complex__ double cplx = 1.414 + 1.618*I;
      40  
      41  	if (returns_23() == 23)
      42  		return;
      43  
      44  	use_str(str);
      45  	use_S(&S);
      46  	use_cplx(cplx);
      47  }
      48