gcc/testsuite/gcc.dg/cpp/Wsignprom.c

   1 /* { dg-do preprocess } */
   2 /* { dg-options "-Wall" } */
   3
   4 /* Test that -Wall emits the warnings about integer promotion changing
   5    the sign of an operand.  */
   6
   7 #if -1 > 0U  /* { dg-warning "changes sign when promoted" } */
   8 #endif
   9
  10 #if 0U + -1  /* { dg-warning "changes sign when promoted" } */
  11 #endif
  12
  13 #if 0U * -1  /* { dg-warning "changes sign when promoted" } */
  14 #endif
  15
  16 #if 1U / -2  /* { dg-warning "changes sign when promoted" } */
  17 #endif
  18
  19 #if -1 % 1U  /* { dg-warning "changes sign when promoted" } */
  20 #endif
  21
  22 #if 1 ? 0U : -1  /* { dg-warning "changes sign when promoted" } */
  23 #endif
  24
  25 #if 1 ? -1 : 0U  /* { dg-warning "changes sign when promoted" } */
  26 #endif