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1// RUN: %clang_cc1 -triple x86_64-apple-macos11 -fsyntax-only -fobjc-arc -fblocks -verify -Wunused-but-set-variable -Wno-objc-root-class %s2 3id getFoo(void);4 5void test() {6 // no diagnostics for objects with precise lifetime semantics.7 __attribute__((objc_precise_lifetime)) id x;8 x = getFoo();9 10 id x2; // expected-warning {{variable 'x2' set but not used}}11 x2 = getFoo();12 13 do {14 __attribute__((objc_precise_lifetime)) id y;15 y = getFoo();16 17 id y2; // expected-warning {{variable 'y2' set but not used}}18 y2 = getFoo();19 } while(0);20 21 x = ((void *)0);22}23