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A variable declared with __attribute__((cleanup)) cannot be unused, as its address is passed to the clean up function. Do not emit -Wunused-variable for variables declared with the cleanup attribute, which matches GCC's behavior: https://godbolt.org/z/dz5YfTsan Reviewed By: erichkeane, nickdesaulniers Differential Revision: https://reviews.llvm.org/D152180
38 lines
792 B
C
38 lines
792 B
C
// RUN: %clang_cc1 -fsyntax-only -Wunused-variable -fblocks -verify %s
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struct s0 {
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unsigned int i;
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};
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int proto(int a, int b);
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void f0(void) {
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int a __attribute__((unused)),
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b; // expected-warning{{unused}}
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return;
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}
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void f1(void) {
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int i;
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(void)sizeof(i);
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return;
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}
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// PR5933
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int f2(void) {
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int X = 4; // Shouldn't have a bogus 'unused variable X' warning.
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return Y + X; // expected-error {{use of undeclared identifier 'Y'}}
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}
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int f3(void) {
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int X1 = 4;
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(void)(Y1 + X1); // expected-error {{use of undeclared identifier 'Y1'}}
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(void)(^() { int X = 4; }); // expected-warning{{unused}}
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(void)(^() { int X = 4; return Y + X; }); // expected-error {{use of undeclared identifier 'Y'}}
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}
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void c1(int *);
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void f4(void) {
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int __attribute__((cleanup(c1))) X1 = 4;
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}
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