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      1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fobjc-gc -emit-llvm -o - %s | FileCheck %s
      2 
      3 void test0(void) {
      4   extern id test0_helper(void);
      5   __attribute__((objc_precise_lifetime)) id x = test0_helper();
      6   test0_helper();
      7   // CHECK: define void @test0()
      8   // CHECK:      [[T0:%.*]] = call i8* @test0_helper()
      9   // CHECK-NEXT: store i8* [[T0]], i8** [[X:%.*]], align 8
     10   // CHECK-NEXT: call i8* @test0_helper()
     11   // CHECK-NEXT: [[T0:%.*]] = load i8** [[X]], align 8
     12   // CHECK-NEXT: call void asm sideeffect "", "r"(i8* [[T0]]) [[NUW:#[0-9]+]]
     13   // CHECK-NEXT: ret void
     14 }
     15 
     16 // CHECK: attributes [[NUW]] = { nounwind }
     17