gcc/testsuite/gcc.dg/compare1.c

   1 /* Test for a bogus warning on comparison between signed and unsigned.
   2    This was inspired by code in gcc.  This testcase is identical to
   3    compare9.c except that we use -fno-short-enums here and expect a
   4    warning from case 4.  */
   5
   6 /* { dg-do compile } */
   7 /* { dg-options "-fno-short-enums -Wsign-compare" } */
   8
   9 int tf = 1;
  10
  11 /* This enumeration has an explicit negative value and is therefore signed.  */
  12 enum mm1
  13 {
  14   VOID, SI, DI, MAX = -1
  15 };
  16
  17 /* This enumeration fits entirely in a signed int, but is unsigned anyway.  */
  18 enum mm2
  19 {
  20   VOID2, SI2, DI2, MAX2
  21 };
  22
  23 int f(enum mm1 x)
  24 {
  25   return x == (tf?DI:SI); /* { dg-bogus "signed and unsigned" "case 1" } */
  26 }
  27
  28 int g(enum mm1 x)
  29 {
  30   return x == (tf?DI:-1); /* { dg-bogus "signed and unsigned" "case 2" } */
  31 }
  32
  33 int h(enum mm2 x)
  34 {
  35   return x == (tf?DI2:SI2); /* { dg-bogus "signed and unsigned" "case 3" } */
  36 }
  37
  38 int i(enum mm2 x)
  39 {
  40   return x == (tf?DI2:-1); /* { dg-warning "signed and unsigned" "case 4" } */
  41 }