test/Sema/shift.c

   1 // RUN: %clang -Wall -ffreestanding -fsyntax-only -Xclang -verify %s
   2
   3 #include <limits.h>
   4
   5 enum {
   6   X = 1 << 0,
   7   Y = 1 << 1,
   8   Z = 1 << 2
   9 };
  10
  11 void test() {
  12   char c;
  13
  14   c = 0 << 0;
  15   c = 0 << 1;
  16   c = 1 << 0;
  17   c = 1 << -0;
  18   c = 1 >> -0;
  19   c = 1 << -1; // expected-warning {{shift count is negative}}
  20   c = 1 >> -1; // expected-warning {{shift count is negative}}
  21   c = 1 << c;
  22   c <<= 0;
  23   c >>= 0;
  24   c <<= 1;
  25   c >>= 1;
  26   c <<= -1; // expected-warning {{shift count is negative}}
  27   c >>= -1; // expected-warning {{shift count is negative}}
  28   c <<= 999999; // expected-warning {{shift count >= width of type}}
  29   c >>= 999999; // expected-warning {{shift count >= width of type}}
  30   c <<= CHAR_BIT; // expected-warning {{shift count >= width of type}}
  31   c >>= CHAR_BIT; // expected-warning {{shift count >= width of type}}
  32   c <<= CHAR_BIT+1; // expected-warning {{shift count >= width of type}}
  33   c >>= CHAR_BIT+1; // expected-warning {{shift count >= width of type}}
  34   (void)((long)c << CHAR_BIT);
  35 }
  36
  37 #define a 0
  38 #define ashift 8
  39 enum { b = (a << ashift) };
  40