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TheRock/compiler/amd-llvm/clang/test/SemaObjC/objc-precise-lifetime-unused-variable.m
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23 lines
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Objective-C

// RUN: %clang_cc1 -triple x86_64-apple-macos11 -fsyntax-only -fobjc-arc -fblocks -verify -Wunused-but-set-variable -Wno-objc-root-class %s
id getFoo(void);
void test() {
// no diagnostics for objects with precise lifetime semantics.
__attribute__((objc_precise_lifetime)) id x;
x = getFoo();
id x2; // expected-warning {{variable 'x2' set but not used}}
x2 = getFoo();
do {
__attribute__((objc_precise_lifetime)) id y;
y = getFoo();
id y2; // expected-warning {{variable 'y2' set but not used}}
y2 = getFoo();
} while(0);
x = ((void *)0);
}