diff options
Diffstat (limited to 'clang/test/Preprocessor/expr_liveness.c')
| -rw-r--r-- | clang/test/Preprocessor/expr_liveness.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/clang/test/Preprocessor/expr_liveness.c b/clang/test/Preprocessor/expr_liveness.c new file mode 100644 index 0000000..c3b6421 --- /dev/null +++ b/clang/test/Preprocessor/expr_liveness.c @@ -0,0 +1,52 @@ +/* RUN: %clang_cc1 -E %s -DNO_ERRORS -Werror -Wundef + RUN: not %clang_cc1 -E %s + */ + +#ifdef NO_ERRORS +/* None of these divisions by zero are in live parts of the expression, do not + emit any diagnostics. */ + +#define MACRO_0 0 +#define MACRO_1 1 + +#if MACRO_0 && 10 / MACRO_0 +foo +#endif + +#if MACRO_1 || 10 / MACRO_0 +bar +#endif + +#if 0 ? 124/0 : 42 +#endif + +// PR2279 +#if 0 ? 1/0: 2 +#else +#error +#endif + +// PR2279 +#if 1 ? 2 ? 3 : 4 : 5 +#endif + +// PR2284 +#if 1 ? 0: 1 ? 1/0: 1/0 +#endif + +#else + + +/* The 1/0 is live, it should error out. */ +#if 0 && 1 ? 4 : 1 / 0 +baz +#endif + + +#endif + +// rdar://6505352 +// -Wundef should not warn about use of undefined identifier if not live. +#if (!defined(XXX) || XXX > 42) +#endif + |