diff options
Diffstat (limited to 'clang/test/Sema/unary-minus-integer-impcast.c')
| -rw-r--r-- | clang/test/Sema/unary-minus-integer-impcast.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/clang/test/Sema/unary-minus-integer-impcast.c b/clang/test/Sema/unary-minus-integer-impcast.c new file mode 100644 index 00000000000..0eb44017588 --- /dev/null +++ b/clang/test/Sema/unary-minus-integer-impcast.c @@ -0,0 +1,20 @@ +// RUN: %clang_cc1 %s -verify -Wconversion -fsyntax-only -triple x86_64-pc-linux-gnu +// RUN: %clang_cc1 %s -verify -Wconversion -fsyntax-only -triple i386-pc-linux-gnu + +void test(void) { + unsigned int a = 1; + + unsigned long long b = -a; // expected-warning {{higher order bits are zeroes after implicit conversion}} + long long c = -a; // expected-warning {{the resulting value is always non-negative after implicit conversion}} + + unsigned long b2 = -a; +#ifdef __x86_64__ +// expected-warning@-2 {{higher order bits are zeroes after implicit conversion}} +#endif + long c2 = -a; +#ifdef __x86_64__ +// expected-warning@-2 {{the resulting value is always non-negative after implicit conversion}} +#else +// expected-warning@-4 {{implicit conversion changes signedness: 'unsigned int' to 'long'}} +#endif +} |