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1 // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple %itanium_abi_triple %s -S -emit-llvm -o - | FileCheck %s
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2 // PR4262
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3
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4 // CHECK-NOT: _ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag
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5
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6 // The "basic_string" extern template instantiation declaration is supposed to
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7 // suppress the implicit instantiation of non-inline member functions. Make sure
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8 // that we suppress the implicit instantiation of non-inline member functions
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9 // defined out-of-line. That we aren't instantiating the basic_string
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10 // constructor when we shouldn't be. Such an instantiation forces the implicit
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11 // instantiation of _S_construct<const char*>. Since _S_construct is a member
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12 // template, it's instantiation is *not* suppressed (despite being in
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13 // basic_string<char>), so we would emit it as a weak definition.
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14
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15 #define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
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16 #define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__visibility__("hidden"), __always_inline__))
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17 #define _LIBCPP_VISIBLE __attribute__ ((__visibility__("default")))
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18 #if (__has_feature(cxx_noexcept))
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19 # define _NOEXCEPT noexcept
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20 # define _NOEXCEPT_(x) noexcept(x)
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21 #else
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22 # define _NOEXCEPT throw()
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23 # define _NOEXCEPT_(x)
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24 #endif
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25
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26 namespace std // purposefully not using versioning namespace
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27 {
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28
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29 template<class charT> struct char_traits;
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30 template<class T> class allocator;
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31 template <class _CharT,
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32 class _Traits = char_traits<_CharT>,
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33 class _Allocator = allocator<_CharT> >
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34 class _LIBCPP_VISIBLE basic_string;
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35 typedef basic_string<char, char_traits<char>, allocator<char> > string;
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36
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37 class _LIBCPP_EXCEPTION_ABI exception
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38 {
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39 public:
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40 _LIBCPP_INLINE_VISIBILITY exception() _NOEXCEPT {}
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41 virtual ~exception() _NOEXCEPT;
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42 virtual const char* what() const _NOEXCEPT;
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43 };
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44
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45 class _LIBCPP_EXCEPTION_ABI runtime_error
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46 : public exception
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47 {
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48 private:
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49 void* __imp_;
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50 public:
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51 explicit runtime_error(const string&);
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52 explicit runtime_error(const char*);
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53
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54 runtime_error(const runtime_error&) _NOEXCEPT;
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55 runtime_error& operator=(const runtime_error&) _NOEXCEPT;
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56
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57 virtual ~runtime_error() _NOEXCEPT;
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58
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59 virtual const char* what() const _NOEXCEPT;
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60 };
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61
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62 }
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63
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64 void dummysymbol() {
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65 throw(std::runtime_error("string"));
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66 }
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221
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67
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68 namespace not_weak_on_first {
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69 int func();
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70 // CHECK: {{.*}} extern_weak {{.*}} @_ZN17not_weak_on_first4funcEv(
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71 int func() __attribute__ ((weak));
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72
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73 typedef int (*FuncT)();
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74
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75 extern const FuncT table[] = {
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76 func,
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77 };
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78 }
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252
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79
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80 namespace constant_eval {
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81 [[gnu::weak]] extern int a;
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82 // CHECK-LABEL: define {{.*}} @__cxx_global_var_init
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83 // CHECK: store i8 zext (i1 icmp ne (ptr @_ZN13constant_eval1aE, ptr null) to i8), ptr @_ZN13constant_eval6has_a1E,
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84 bool has_a1 = &a;
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85 // CHECK-LABEL: define {{.*}} @__cxx_global_var_init
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86 // CHECK: store i8 zext (i1 icmp ne (ptr @_ZN13constant_eval1aE, ptr null) to i8), ptr @_ZN13constant_eval6has_a2E,
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87 bool has_a2 = &a != nullptr;
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88
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89 struct X {
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90 [[gnu::weak]] void f();
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91 };
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92 // CHECK-LABEL: define {{.*}} @__cxx_global_var_init
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93 // CHECK: store i8 zext (i1 icmp ne (i{{32|64}} ptrtoint (ptr @_ZN13constant_eval1X1fEv to i{{32|64}}), i{{32|64}} 0) to i8), ptr @_ZN13constant_eval6has_f1E,
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94 bool has_f1 = &X::f;
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95 // CHECK-LABEL: define {{.*}} @__cxx_global_var_init
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96 // CHECK: store i8 zext (i1 icmp ne (i{{32|64}} ptrtoint (ptr @_ZN13constant_eval1X1fEv to i{{32|64}}), i{{32|64}} 0) to i8), ptr @_ZN13constant_eval6has_f2E,
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97 bool has_f2 = &X::f != nullptr;
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98 }
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