clang/test/Sema/switch-1.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-apple-darwin10 %s
   2 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify -triple x86_64-apple-darwin10 %s
   3 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify -triple x86_64-apple-darwin10 -std=c++98 %s
   4 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify -triple x86_64-apple-darwin10 -std=c++11 %s
   5
   6 int f(int i) {
   7   switch (i) {
   8     case 2147483647 + 2:
   9 #if (__cplusplus <= 199711L) // C or C++03 or earlier modes
  10     // expected-warning@-2 {{overflow in expression; result is -2147483647 with type 'int'}}
  11 #else
  12     // expected-error@-4 {{case value is not a constant expression}} \
  13     // expected-note@-4 {{value 2147483649 is outside the range of representable values of type 'int'}}
  14 #endif
  15       return 1;
  16     case 9223372036854775807L * 4:
  17 #if (__cplusplus <= 199711L)
  18     // expected-warning@-2 {{overflow in expression; result is -4 with type 'long'}}
  19 #else
  20     // expected-error@-4 {{case value is not a constant expression}} \
  21     // expected-note@-4 {{value 36893488147419103228 is outside the range of representable values of type 'long'}}
  22 #endif
  23       return 2;
  24     case (123456 *789012) + 1:
  25 #if (__cplusplus <= 199711L)
  26     // expected-warning@-2 {{overflow in expression; result is -1375982336 with type 'int'}}
  27 #else
  28     // expected-error@-4 {{case value is not a constant expression}} \
  29     // expected-note@-4 {{value 97408265472 is outside the range of representable values of type 'int'}}
  30 #endif
  31       return 3;
  32     case (2147483647*4)/4:
  33 #if (__cplusplus <= 199711L)
  34     // expected-warning@-2 {{overflow in expression; result is -4 with type 'int'}}
  35 #else
  36     // expected-error@-4 {{case value is not a constant expression}} \
  37     // expected-note@-4 {{value 8589934588 is outside the range of representable values of type 'int'}}
  38 #endif
  39     case (2147483647*4)%4:
  40 #if (__cplusplus <= 199711L)
  41     // expected-warning@-2 {{overflow in expression; result is -4 with type 'int'}}
  42 #else
  43     // expected-error@-4 {{case value is not a constant expression}} \
  44     // expected-note@-4 {{value 8589934588 is outside the range of representable values of type 'int'}}
  45 #endif
  46       return 4;
  47     case 2147483647:
  48       return 0;
  49   }
  50   return (i, 65537) * 65537; // expected-warning {{overflow in expression; result is 131073 with type 'int'}} \
  51                              // expected-warning {{left operand of comma operator has no effect}}
  52 }
  53
  54 unsigned long long l = 65536 * 65536; // expected-warning {{overflow in expression; result is 0 with type 'int'}}
  55 unsigned long long l2 = 65536 * (unsigned)65536;
  56 unsigned long long l3 = 65536 * 65536ULL;