gcc/testsuite/c-c++-common/Wsign-compare-1.c

   1 /* PR c/81417 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wsign-compare" } */
   4
   5 int
   6 fn1 (signed int a, unsigned int b)
   7 {
   8   return a < b; /* { dg-warning "comparison of integer expressions of different signedness: 'int' and 'unsigned int'" } */
   9 }
  10
  11 int
  12 fn2 (signed int a, unsigned int b)
  13 {
  14   return b < a; /* { dg-warning "comparison of integer expressions of different signedness: 'unsigned int' and 'int'" } */
  15 }
  16
  17 int
  18 fn3 (signed long int a, unsigned long int b)
  19 {
  20   return b < a; /* { dg-warning "comparison of integer expressions of different signedness: 'long unsigned int' and 'long int'" } */
  21 }
  22
  23 int
  24 fn4 (signed short int a, unsigned int b)
  25 {
  26   return b < a; /* { dg-warning "comparison of integer expressions of different signedness: 'unsigned int' and 'short int'" } */
  27 }
  28
  29 int
  30 fn5 (unsigned int a, signed int b)
  31 {
  32   return a < b; /* { dg-warning "comparison of integer expressions of different signedness: 'unsigned int' and 'int'" } */
  33 }