forked from OSchip/llvm-project
46 lines
1.9 KiB
C++
46 lines
1.9 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wall -Wuninitialized -verify %s
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int foo(int x);
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int bar(int* x);
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int boo(int& x);
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int far(const int& x);
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// Test self-references within initializers which are guaranteed to be
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// uninitialized.
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int a = a; // no-warning: used to signal intended lack of initialization.
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int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
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int c = (c + c); // expected-warning 2 {{variable 'c' is uninitialized when used within its own initialization}}
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void test() {
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int d = ({ d + d ;}); // expected-warning {{variable 'd' is uninitialized when used within its own initialization}}
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}
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int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
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int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
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// Thes don't warn as they don't require the value.
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int g = sizeof(g);
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void* ptr = &ptr;
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int h = bar(&h);
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int i = boo(i);
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int j = far(j);
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int k = __alignof__(k);
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// Also test similar constructs in a field's initializer.
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struct S {
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int x;
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void *ptr;
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S(bool (*)[1]) : x(x) {} // expected-warning {{field is uninitialized when used here}}
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S(bool (*)[2]) : x(x + 1) {} // expected-warning {{field is uninitialized when used here}}
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S(bool (*)[3]) : x(x + x) {} // expected-warning {{field is uninitialized when used here}}
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S(bool (*)[4]) : x(static_cast<long>(x) + 1) {} // expected-warning {{field is uninitialized when used here}}
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S(bool (*)[5]) : x(foo(x)) {} // FIXME: This should warn!
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// These don't actually require the value of x and so shouldn't warn.
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S(char (*)[1]) : x(sizeof(x)) {} // rdar://8610363
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S(char (*)[2]) : ptr(&ptr) {}
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S(char (*)[3]) : x(__alignof__(x)) {}
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S(char (*)[4]) : x(bar(&x)) {}
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S(char (*)[5]) : x(boo(x)) {}
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S(char (*)[6]) : x(far(x)) {}
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};
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