clang/test/SemaCXX/attr-target-mv.cpp

   1 // RUN: %clang_cc1 -triple x86_64-linux-gnu  -fsyntax-only -verify -fexceptions -fcxx-exceptions %s -std=c++14
   2 void __attribute__((target("default"))) invalid_features(void);
   3 //expected-error@+2 {{function declaration is missing 'target' attribute in a multiversioned function}}
   4 //expected-warning@+1 {{unsupported 'hello_world' in the 'target' attribute string; 'target' attribute ignored}}
   5 void __attribute__((target("hello_world"))) invalid_features(void);
   6 //expected-error@+1 {{function multiversioning doesn't support feature 'no-sse4.2'}}
   7 void __attribute__((target("no-sse4.2"))) invalid_features(void);
   8
   9 void __attribute__((target("sse4.2"))) no_default(void);
  10 void __attribute__((target("arch=sandybridge")))  no_default(void);
  11
  12 void use1(void){
  13   // expected-error@+1 {{no matching function for call to 'no_default'}}
  14   no_default();
  15 }
  16 constexpr int __attribute__((target("sse4.2"))) foo(void) { return 0; }
  17 constexpr int __attribute__((target("arch=sandybridge"))) foo(void);
  18 //expected-error@+1 {{multiversioned function declaration has a different constexpr specification}}
  19 int __attribute__((target("arch=ivybridge"))) foo(void) {return 1;}
  20 constexpr int __attribute__((target("default"))) foo(void) { return 2; }
  21
  22 int __attribute__((target("sse4.2"))) foo2(void) { return 0; }
  23 //expected-error@+1 {{multiversioned function declaration has a different constexpr specification}}
  24 constexpr int __attribute__((target("arch=sandybridge"))) foo2(void);
  25 int __attribute__((target("arch=ivybridge"))) foo2(void) {return 1;}
  26 int __attribute__((target("default"))) foo2(void) { return 2; }
  27
  28 static int __attribute__((target("sse4.2"))) bar(void) { return 0; }
  29 static int __attribute__((target("arch=sandybridge"))) bar(void);
  30 //expected-error@+1 {{multiversioned function declaration has a different linkage}}
  31 int __attribute__((target("arch=ivybridge"))) bar(void) {return 1;}
  32 static int __attribute__((target("default"))) bar(void) { return 2; }
  33
  34 int __attribute__((target("sse4.2"))) bar2(void) { return 0; }
  35 //expected-error@+1 {{multiversioned function declaration has a different linkage}}
  36 static int __attribute__((target("arch=sandybridge"))) bar2(void);
  37 int __attribute__((target("arch=ivybridge"))) bar2(void) {return 1;}
  38 int __attribute__((target("default"))) bar2(void) { return 2; }
  39
  40
  41 // no diagnostic, since this doesn't change the linkage.
  42 int __attribute__((target("sse4.2"))) bar3(void) { return 0; }
  43 extern int __attribute__((target("arch=sandybridge"))) bar2(void);
  44
  45 namespace {
  46 int __attribute__((target("sse4.2"))) bar4(void) { return 0; }
  47 static int __attribute__((target("arch=sandybridge"))) bar4(void);
  48 }
  49
  50 inline int __attribute__((target("sse4.2"))) baz(void) { return 0; }
  51 inline int __attribute__((target("arch=sandybridge"))) baz(void);
  52 //expected-error@+1 {{multiversioned function declaration has a different inline specification}}
  53 int __attribute__((target("arch=ivybridge"))) baz(void) {return 1;}
  54 inline int __attribute__((target("default"))) baz(void) { return 2; }
  55
  56 int __attribute__((target("sse4.2"))) baz2(void) { return 0; }
  57 //expected-error@+1 {{multiversioned function declaration has a different inline specification}}
  58 inline int __attribute__((target("arch=sandybridge"))) baz2(void);
  59 int __attribute__((target("arch=ivybridge"))) baz2(void) {return 1;}
  60 int __attribute__((target("default"))) baz2(void) { return 2; }
  61
  62 float __attribute__((target("sse4.2"))) bock(void) { return 0; }
  63 //expected-error@+1 {{multiversioned function declaration has a different return type}}
  64 int __attribute__((target("arch=sandybridge"))) bock(void);
  65 //expected-error@+1 {{multiversioned function declaration has a different return type}}
  66 int __attribute__((target("arch=ivybridge"))) bock(void) {return 1;}
  67 //expected-error@+1 {{multiversioned function declaration has a different return type}}
  68 int __attribute__((target("default"))) bock(void) { return 2; }
  69
  70 int __attribute__((target("sse4.2"))) bock2(void) { return 0; }
  71 //expected-error@+1 {{multiversioned function declaration has a different return type}}
  72 float __attribute__((target("arch=sandybridge"))) bock2(void);
  73 int __attribute__((target("arch=ivybridge"))) bock2(void) {return 1;}
  74 int __attribute__((target("default"))) bock2(void) { return 2; }
  75
  76 auto __attribute__((target("sse4.2"))) bock3(void) -> int { return 0; }
  77 //expected-error@+1 {{multiversioned function declaration has a different return type}}
  78 auto __attribute__((target("arch=sandybridge"))) bock3(void) -> short { return (short)0;}
  79
  80 int __attribute__((target("sse4.2"))) bock4(void) noexcept(false) { return 0; }
  81 //expected-error@+2 {{exception specification in declaration does not match previous declaration}}
  82 //expected-note@-2 {{previous declaration is here}}
  83 int __attribute__((target("arch=sandybridge"))) bock4(void) noexcept(true) { return 1;}
  84
  85 // FIXME: Add support for templates and virtual functions!
  86 template<typename T>
  87 int __attribute__((target("sse4.2"))) foo(T) { return 0; }
  88 // expected-error@+2 {{multiversioned functions do not yet support function templates}}
  89 template<typename T>
  90 int __attribute__((target("arch=sandybridge"))) foo(T);
  91
  92 // expected-error@+2 {{multiversioned functions do not yet support function templates}}
  93 template<typename T>
  94 int __attribute__((target("default"))) foo(T) { return 2; }
  95
  96 struct S {
  97   template<typename T>
  98   int __attribute__((target("sse4.2"))) foo(T) { return 0; }
  99   // expected-error@+2 {{multiversioned functions do not yet support function templates}}
 100   template<typename T>
 101   int __attribute__((target("arch=sandybridge"))) foo(T);
 102
 103   // expected-error@+2 {{multiversioned functions do not yet support function templates}}
 104   template<typename T>
 105   int __attribute__((target("default"))) foo(T) { return 2; }
 106
 107   // expected-error@+1 {{multiversioned functions do not yet support virtual functions}}
 108   virtual void __attribute__((target("default"))) virt();
 109 };
 110
 111 extern "C" {
 112 int __attribute__((target("sse4.2"))) diff_mangle(void) { return 0; }
 113 }
 114 //expected-error@+1 {{multiversioned function declaration has a different language linkage}}
 115 int __attribute__((target("arch=sandybridge"))) diff_mangle(void) { return 0; }
 116
 117 // expected-error@+1 {{multiversioned functions do not yet support deduced return types}}
 118 auto __attribute__((target("default"))) deduced_return(void) { return 0; }
 119
 120 auto __attribute__((target("default"))) trailing_return(void)-> int { return 0; }
 121
 122 __attribute__((target("default"))) void DiffDecl();
 123 namespace N {
 124 using ::DiffDecl;
 125 // expected-error@+3 {{declaration conflicts with target of using declaration already in scope}}
 126 // expected-note@-4 {{target of using declaration}}
 127 // expected-note@-3 {{using declaration}}
 128 __attribute__((target("arch=sandybridge"))) void DiffDecl();
 129 } // namespace N
 130
 131 struct SpecialFuncs {
 132   // expected-error@+1 {{multiversioned functions do not yet support constructors}}
 133   __attribute__((target("default"))) SpecialFuncs();
 134   // expected-error@+1 {{multiversioned functions do not yet support destructors}}
 135   __attribute__((target("default"))) ~SpecialFuncs();
 136
 137   // expected-error@+1 {{multiversioned functions do not yet support defaulted functions}}
 138   SpecialFuncs& __attribute__((target("default"))) operator=(const SpecialFuncs&) = default;
 139   // expected-error@+1 {{multiversioned functions do not yet support deleted functions}}
 140   SpecialFuncs& __attribute__((target("default"))) operator=(SpecialFuncs&&) = delete;
 141 };
 142
 143 class Secret {
 144   int i = 0;
 145   __attribute__((target("default")))
 146   friend int SecretAccessor(Secret &s);
 147   __attribute__((target("arch=sandybridge")))
 148   friend int SecretAccessor(Secret &s);
 149 };
 150
 151 __attribute__((target("default")))
 152 int SecretAccessor(Secret &s) {
 153   return s.i;
 154 }
 155
 156 __attribute__((target("arch=sandybridge")))
 157 int SecretAccessor(Secret &s) {
 158   return s.i + 2;
 159 }
 160
 161 __attribute__((target("arch=ivybridge")))
 162 int SecretAccessor(Secret &s) {
 163   //expected-error@+2{{'i' is a private member of 'Secret'}}
 164   //expected-note@-20{{implicitly declared private here}}
 165   return s.i + 3;
 166 }
 167
 168 constexpr int __attribute__((target("sse4.2"))) constexpr_foo(void) {
 169   return 0;
 170 }
 171 constexpr int __attribute__((target("arch=sandybridge"))) constexpr_foo(void);
 172 constexpr int __attribute__((target("arch=ivybridge"))) constexpr_foo(void) {
 173   return 1;
 174 }
 175 constexpr int __attribute__((target("default"))) constexpr_foo(void) {
 176   return 2;
 177 }
 178
 179 void constexpr_test() {
 180   static_assert(foo() == 2, "Should call 'default' in a constexpr context");
 181 }
 182
 183 struct BadOutOfLine {
 184   int __attribute__((target("sse4.2"))) foo(int);
 185   int __attribute__((target("default"))) foo(int);
 186 };
 187
 188 int __attribute__((target("sse4.2"))) BadOutOfLine::foo(int) { return 0; }
 189 int __attribute__((target("default"))) BadOutOfLine::foo(int) { return 1; }
 190 // expected-error@+3 {{out-of-line definition of 'foo' does not match any declaration in 'BadOutOfLine'}}
 191 // expected-note@-3 {{member declaration nearly matches}}
 192 // expected-note@-3 {{member declaration nearly matches}}
 193 int __attribute__((target("arch=atom"))) BadOutOfLine::foo(int) { return 1; }