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// RUN: %clang_cc1 -fsyntax-only -Wself-assign -verify %s
void f() {
int a = 42, b = 42;
a = a; // expected-warning{{explicitly assigning}}
b = b; // expected-warning{{explicitly assigning}}
a = b;
b = a = b;
a = a = a; // expected-warning{{explicitly assigning}}
a = b = b = a;
a &= a; // expected-warning{{explicitly assigning}}
a |= a; // expected-warning{{explicitly assigning}}
a ^= a;
}
// Dummy type.
struct S {};
void false_positives() {
#define OP =
#define LHS a
#define RHS a
int a = 42;
// These shouldn't warn due to the use of the preprocessor.
a OP a;
LHS = a;
a = RHS;
LHS OP RHS;
#undef OP
#undef LHS
#undef RHS
S s;
s = s; // Not a builtin assignment operator, no warning.
// Volatile stores aren't side-effect free.
volatile int vol_a;
vol_a = vol_a;
volatile int &vol_a_ref = vol_a;
vol_a_ref = vol_a_ref;
}
template <typename T> void g() {
T a;
a = a; // May or may not be a builtin assignment operator, no warning.
}
void instantiate() {
g<int>();
g<S>();
}
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