1*14ba782aSKees Cook // RUN: %clang_cc1 -triple i386-unknown-unknown -x c++ -emit-llvm -o - %s | FileCheck %s 2*14ba782aSKees Cook 3*14ba782aSKees Cook union _u { char a[]; } u = {}; 4*14ba782aSKees Cook union _u0 { char a[]; } u0 = {0}; 5*14ba782aSKees Cook 6*14ba782aSKees Cook // CHECK: %union._u = type { [0 x i8] } 7*14ba782aSKees Cook 8*14ba782aSKees Cook // CHECK: @u = global %union._u zeroinitializer, align 1 9*14ba782aSKees Cook // CHECK: @u0 = global { [1 x i8] } zeroinitializer, align 1 10*14ba782aSKees Cook 11*14ba782aSKees Cook union { char a[]; } z = {}; 12*14ba782aSKees Cook // CHECK: @z = internal global %union.{{.*}} zeroinitializer, align 1 13*14ba782aSKees Cook union { char a[]; } z0 = {0}; 14*14ba782aSKees Cook // CHECK: @z0 = internal global { [1 x i8] } zeroinitializer, align 1 15*14ba782aSKees Cook 16*14ba782aSKees Cook /* C++ requires global anonymous unions have static storage, so we have to 17*14ba782aSKees Cook reference them to keep them in the IR output. */ keep(int pick)18*14ba782aSKees Cookchar keep(int pick) 19*14ba782aSKees Cook { 20*14ba782aSKees Cook if (pick) 21*14ba782aSKees Cook return z.a[0]; 22*14ba782aSKees Cook else 23*14ba782aSKees Cook return z0.a[0]; 24*14ba782aSKees Cook } 25