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Diffstat (limited to 'test/SemaCXX/warn-bitwise-compare.cpp')
| -rw-r--r-- | test/SemaCXX/warn-bitwise-compare.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/SemaCXX/warn-bitwise-compare.cpp b/test/SemaCXX/warn-bitwise-compare.cpp new file mode 100644 index 0000000000..894d4c581e --- /dev/null +++ b/test/SemaCXX/warn-bitwise-compare.cpp @@ -0,0 +1,12 @@ +// RUN: %clang_cc1 -fsyntax-only -verify -Wtautological-bitwise-compare %s + +void test(int x) { + bool b1 = (8 & x) == 3; + // expected-warning@-1 {{bitwise comparison always evaluates to false}} + bool b2 = x | 5; + // expected-warning@-1 {{bitwise or with non-zero value always evaluates to true}} + bool b3 = (x | 5); + // expected-warning@-1 {{bitwise or with non-zero value always evaluates to true}} + bool b4 = !!(x | 5); + // expected-warning@-1 {{bitwise or with non-zero value always evaluates to true}} +} |