clang/test/Preprocessor/expr_liveness.c

   1 /* RUN: %clang_cc1 -E %s -DNO_ERRORS -Werror -Wundef
   2    RUN: not %clang_cc1 -E %s
   3  */
   4
   5 #ifdef NO_ERRORS
   6 /* None of these divisions by zero are in live parts of the expression, do not
   7    emit any diagnostics. */
   8
   9 #define MACRO_0 0
  10 #define MACRO_1 1
  11
  12 #if MACRO_0 && 10 / MACRO_0
  13 foo
  14 #endif
  15
  16 #if MACRO_1 || 10 / MACRO_0
  17 bar
  18 #endif
  19
  20 #if 0 ? 124/0 : 42
  21 #endif
  22
  23 // PR2279
  24 #if 0 ? 1/0: 2
  25 #else
  26 #error
  27 #endif
  28
  29 // PR2279
  30 #if 1 ? 2 ? 3 : 4 : 5
  31 #endif
  32
  33 // PR2284
  34 #if 1 ? 0: 1 ? 1/0: 1/0
  35 #endif
  36
  37 #else
  38
  39
  40 /* The 1/0 is live, it should error out. */
  41 #if 0 && 1 ? 4 : 1 / 0
  42 baz
  43 #endif
  44
  45
  46 #endif
  47
  48 // rdar://6505352
  49 // -Wundef should not warn about use of undefined identifier if not live.
  50 #if (!defined(XXX) || XXX > 42)
  51 #endif
  52