25 lines · cpp
1// RUN: %clang_cc1 -triple i386-unknown-unknown -x c++ -emit-llvm -o - %s | FileCheck %s2 3union _u { char a[]; } u = {};4union _u0 { char a[]; } u0 = {0};5 6// CHECK: %union._u = type { [0 x i8] }7 8// CHECK: @u = global %union._u zeroinitializer, align 19// CHECK: @u0 = global { [1 x i8] } zeroinitializer, align 110 11union { char a[]; } z = {};12// CHECK: @z = internal global %union.{{.*}} zeroinitializer, align 113union { char a[]; } z0 = {0};14// CHECK: @z0 = internal global { [1 x i8] } zeroinitializer, align 115 16/* C++ requires global anonymous unions have static storage, so we have to17 reference them to keep them in the IR output. */18char keep(int pick)19{20 if (pick)21 return z.a[0];22 else23 return z0.a[0];24}25