clang/test/CodeGen/union-init2.c

   1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple i686-pc-linux-gnu | FileCheck %s
   2 // RUN: %clang_cc1 -x c++ %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s --check-prefixes=CHECK-CXX
   3
   4 // Make sure we generate something sane instead of a ptrtoint
   5 // CHECK: @r, [4 x i8] zeroinitializer
   6 union x {long long b;union x* a;} r = {.a = &r};
   7
   8
   9 // CHECK: global { [3 x i8], [5 x i8] } zeroinitializer
  10 union z {
  11   char a[3];
  12   long long b;
  13 };
  14 union z y = {};
  15
  16 // CHECK: @foo = {{.*}}global %union.Foo undef, align 1
  17 // CHECK-CXX: @foo = {{.*}}global %union.Foo undef, align 1
  18 union Foo {
  19   struct Empty {} val;
  20 };
  21 union Foo foo = {};