24 lines
862 B
C
24 lines
862 B
C
// 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
|
|
|
|
unsigned m;
|
|
int n = -(m & 0xff); // no warning
|
|
}
|