clang/test/CodeGenCXX/reference-init.cpp

   1 // RUN: %clang_cc1 -triple %itanium_abi_triple -verify %s
   2 // RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm %s -o - -std=c++98 | FileCheck %s --check-prefix=CHECK-CXX98
   3 // RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm %s -o - -std=c++11 | FileCheck %s --check-prefix=CHECK-CXX11
   4 // expected-no-diagnostics
   5
   6 #if __cplusplus >= 201103L
   7 // CHECK-CXX11: @_ZZ15InitRefWithListvE1r = internal constant ptr @_ZGRZ15InitRefWithListvE1r_
   8 // CHECK-CXX11: @_ZGRZ15InitRefWithListvE1r_ = internal constant i32 123
   9 int InitRefWithList() { static const int &r = {123}; return r; }
  10 #endif
  11
  12 struct XPTParamDescriptor {};
  13 struct nsXPTParamInfo {
  14   nsXPTParamInfo(const XPTParamDescriptor& desc);
  15 };
  16 void a(XPTParamDescriptor *params) {
  17   const nsXPTParamInfo& paramInfo = params[0];
  18 }
  19
  20 // CodeGen of reference initialized const arrays.
  21 namespace PR5911 {
  22   template <typename T, int N> int f(const T (&a)[N]) { return N; }
  23   int iarr[] = { 1 };
  24   int test() { return f(iarr); }
  25 }
  26
  27 struct Foo { int foo; };
  28 Foo& ignoreSetMutex = *(new Foo);
  29
  30 // Binding to a bit-field that requires a temporary.
  31 struct { int bitfield : 3; } s = { 3 };
  32 const int &s2 = s.bitfield;
  33
  34 // In C++98, this forms a reference to itself. In C++11 onwards, this performs
  35 // copy-construction.
  36 struct SelfReference { SelfReference &r; };
  37 extern SelfReference self_reference_1;
  38 SelfReference self_reference_2 = {self_reference_1};
  39 // CHECK-CXX98: @self_reference_2 = {{.*}}global %[[SELF_REF:.*]] { ptr @self_reference_1 }
  40 // CHECK-CXX11: @self_reference_2 = {{(dso_local )?}}global %[[SELF_REF:.*]] zeroinitializer
  41 // CHECK-CXX11: call {{.*}}memcpy{{.*}} @self_reference_2, {{.*}} @self_reference_1