gcc/testsuite/gcc.dg/noreturn-1.c

   1 /* Check for various valid and erroneous "noreturn" cases. */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -Wmissing-noreturn" } */
   4
   5 extern void exit (int);
   6
   7 extern void foo1(void) __attribute__ ((__noreturn__));
   8 void
   9 foo1(void)
  10 {
  11 } /* { dg-warning "`noreturn' function does return" "detect falling off end of noreturn" } */
  12
  13 extern void foo2(void) __attribute__ ((__noreturn__));
  14 void
  15 foo2(void)
  16 {
  17   exit(0);
  18 } /* { dg-bogus "warning:" "this function should not get any warnings" } */
  19
  20 extern void foo3(void);
  21 void
  22 foo3(void)
  23 {
  24 } /* { dg-bogus "warning:" "this function should not get any warnings" } */
  25
  26 extern void foo4(void);
  27 void
  28 foo4(void)
  29 {
  30   exit(0);
  31 } /* { dg-warning "candidate for attribute `noreturn'" "detect noreturn candidate" } */
  32
  33 extern void foo5(void) __attribute__ ((__noreturn__));
  34 void
  35 foo5(void)
  36 {
  37   return; /* { dg-warning "`noreturn' has a `return' statement" "detect invalid return" } */
  38 } /* { dg-warning "`noreturn' function does return" "detect return from noreturn" } */
  39
  40 extern void foo6(void);
  41 void
  42 foo6(void)
  43 {
  44   return;
  45 } /* { dg-bogus "warning:" "this function should not get any warnings" } */
  46
  47 extern void foo7(void);
  48 void
  49 foo7(void)
  50 {
  51   foo6();
  52 } /* { dg-bogus "warning:" "this function should not get any warnings" } */
  53
  54 extern void foo8(void) __attribute__ ((__noreturn__));
  55 void
  56 foo8(void)
  57 {
  58   foo7();
  59 } /* { dg-warning "`noreturn' function does return" "detect return from tail call" } */