91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
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// RUN: %clang_cc1 -fsyntax-only -verify -Wunused-value -Wunused-label %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wunused %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wall %s
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int i = 0;
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int j = 0;
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void foo();
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// PR4806
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void pr4806() {
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1,foo(); // expected-warning {{expression result unused}}
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// other
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foo();
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i; // expected-warning {{expression result unused}}
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i,foo(); // expected-warning {{expression result unused}}
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foo(),i; // expected-warning {{expression result unused}}
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i,j,foo(); // expected-warning {{expression result unused}} expected-warning {{expression result unused}}
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i,foo(),j; // expected-warning {{expression result unused}} expected-warning {{expression result unused}}
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foo(),i,j; // expected-warning {{expression result unused}} expected-warning {{expression result unused}}
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i++;
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i++,foo();
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foo(),i++;
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i++,j,foo(); // expected-warning {{expression result unused}}
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i++,foo(),j; // expected-warning {{expression result unused}}
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foo(),i++,j; // expected-warning {{expression result unused}}
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i,j++,foo(); // expected-warning {{expression result unused}}
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i,foo(),j++; // expected-warning {{expression result unused}}
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foo(),i,j++; // expected-warning {{expression result unused}}
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i++,j++,foo();
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i++,foo(),j++;
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foo(),i++,j++;
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{};
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({});
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({}),foo();
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foo(),({});
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(int)1U; // expected-warning {{expression result unused}}
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(void)1U;
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// pointer to volatile has side effect (thus no warning)
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int* pi = &i;
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volatile int* pj = &j;
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*pi; // expected-warning {{expression result unused}}
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*pj;
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foo_label: // expected-warning {{unused label}}
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i; // expected-warning {{expression result unused}}
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}
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// Don't warn about unused '||', '&&' expressions that contain assignments.
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int test_logical_foo1();
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int test_logical_foo2();
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int test_logical_foo3();
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int test_logical_bar() {
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int x = 0;
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(x = test_logical_foo1()) || // no-warning
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(x = test_logical_foo2()) || // no-warning
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(x = test_logical_foo3()); // no-warning
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x || test_logical_foo1(); // no-warning
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return x;
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}
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// PR8282
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void conditional_for_control_flow(int cond, int x, int y)
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{
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cond? y++ : x; // no-warning
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cond? y : ++x; // no-warning
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cond? (x |= y) : ++x; // no-warning
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cond? y : x; // expected-warning {{expression result unused}}
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}
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struct s0 { int f0; };
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void f0(int a);
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void f1(struct s0 *a) {
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// rdar://8139785
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f0((int)(a->f0 + 1, 10)); // expected-warning {{expression result unused}}
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}
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