clang/test/CodeGen/pch-dllexport.cpp

   1 // Build PCH without object file, then use it.
   2 // RUN: %clang_cc1 -triple i686-pc-win32 -fms-extensions -emit-pch -o %t %s
   3 // RUN: %clang_cc1 -triple i686-pc-win32 -fms-extensions -emit-llvm -include-pch %t -o - %s | FileCheck -check-prefix=PCH %s
   4
   5 // Build PCH with object file, then use it.
   6 // RUN: %clang_cc1 -triple i686-pc-win32 -O1 -fms-extensions -emit-pch -building-pch-with-obj -o %t %s
   7 // RUN: %clang_cc1 -triple i686-pc-win32 -O1 -disable-llvm-optzns -fms-extensions -emit-llvm -include-pch %t -building-pch-with-obj -o - %s | FileCheck -check-prefix=OBJ %s
   8 // RUN: %clang_cc1 -triple i686-pc-win32 -O1 -disable-llvm-optzns -fms-extensions -emit-llvm -include-pch %t -o - %s | FileCheck -check-prefix=PCHWITHOBJ -check-prefix=PCHWITHOBJ-O1 %s
   9
  10 // Check for vars separately to avoid having to reorder the check statements.
  11 // RUN: %clang_cc1 -triple i686-pc-win32 -O1 -disable-llvm-optzns -fms-extensions -emit-llvm -include-pch %t -o - %s | FileCheck -check-prefix=PCHWITHOBJVARS %s
  12
  13 // Test the PCHWITHOBJ at -O0 where available_externally definitions are not
  14 // provided:
  15 // RUN: %clang_cc1 -triple i686-pc-win32 -fms-extensions -emit-pch -building-pch-with-obj -o %t %s
  16 // RUN: %clang_cc1 -triple i686-pc-win32 -fms-extensions -emit-llvm -include-pch %t -o - %s | FileCheck -check-prefix=PCHWITHOBJ -check-prefix=PCHWITHOBJ-O0 %s
  17 // RUN: %clang_cc1 -triple i686-pc-win32 -fms-extensions -emit-llvm -include-pch %t -o - %s | FileCheck -check-prefix=PCHWITHOBJVARS %s
  18
  19
  20 #ifndef IN_HEADER
  21 #define IN_HEADER
  22
  23 inline void __declspec(dllexport) foo() {}
  24 // OBJ: define weak_odr dso_local dllexport void @"?foo@@YAXXZ"
  25 // PCH: define weak_odr dso_local dllexport void @"?foo@@YAXXZ"
  26 // PCHWITHOBJ-NOT: define {{.*}}foo
  27
  28
  29 // This function is referenced, so gets emitted as usual.
  30 inline void __declspec(dllexport) baz() {}
  31 // OBJ: define weak_odr dso_local dllexport void @"?baz@@YAXXZ"
  32 // PCH: define weak_odr dso_local dllexport void @"?baz@@YAXXZ"
  33 // PCHWITHOBJ-O1: define available_externally dso_local void @"?baz@@YAXXZ"
  34 // PCHWITHOBJ-O0-NOT: define {{.*}}"?baz@@YAXXZ"
  35
  36
  37 struct __declspec(dllexport) S {
  38   void bar() {}
  39 // OBJ: define weak_odr dso_local dllexport x86_thiscallcc void @"?bar@S@@QAEXXZ"
  40 // PCH: define weak_odr dso_local dllexport x86_thiscallcc void @"?bar@S@@QAEXXZ"
  41 // PCHWITHOBJ-NOT: define {{.*}}bar
  42 };
  43
  44 // This isn't dllexported, attribute((used)) or referenced, so not emitted.
  45 inline void quux() {}
  46 // OBJ-NOT: define {{.*}}quux
  47 // PCH-NOT: define {{.*}}quux
  48 // PCHWITHOBJ-NOT: define {{.*}}quux
  49
  50 // Referenced non-dllexport function.
  51 inline void referencedNonExported() {}
  52 // OBJ: define {{.*}}referencedNonExported
  53 // PCH: define {{.*}}referencedNonExported
  54 // PCHWITHOBJ: define {{.*}}referencedNonExported
  55
  56 template <typename T> void __declspec(dllexport) implicitInstantiation(T) {}
  57
  58 template <typename T> inline void __declspec(dllexport) explicitSpecialization(T) {}
  59
  60 template <typename T> void __declspec(dllexport) explicitInstantiationDef(T) {}
  61
  62 template <typename T> void __declspec(dllexport) explicitInstantiationDefAfterDecl(T) {}
  63 extern template void explicitInstantiationDefAfterDecl<int>(int);
  64
  65 template <typename T> T __declspec(dllexport) variableTemplate;
  66 extern template int variableTemplate<int>;
  67
  68 namespace pr38934 {
  69 template <typename T> struct S {};
  70 extern template struct S<int>;
  71 // The use here causes the S<int>::operator= decl to go into the PCH.
  72 inline void use(S<int> *a, S<int> *b) { *a = *b; };
  73 }
  74
  75 #else
  76
  77 void use() {
  78   baz();
  79   referencedNonExported();
  80 }
  81
  82 // Templates can be tricky. None of the definitions below come from the PCH.
  83
  84 void useTemplate() { implicitInstantiation(42); }
  85 // PCHWITHOBJ: define weak_odr dso_local dllexport void @"??$implicitInstantiation@H@@YAXH@Z"
  86
  87 template<> inline void __declspec(dllexport) explicitSpecialization<int>(int) {}
  88 // PCHWITHOBJ: define weak_odr dso_local dllexport void @"??$explicitSpecialization@H@@YAXH@Z"
  89
  90 template void __declspec(dllexport) explicitInstantiationDef<int>(int);
  91 // PCHWITHOBJ: define weak_odr dso_local dllexport void @"??$explicitInstantiationDef@H@@YAXH@Z"
  92
  93 template void __declspec(dllexport) explicitInstantiationDefAfterDecl<int>(int);
  94 // PCHWITHOBJ: define weak_odr dso_local dllexport void @"??$explicitInstantiationDefAfterDecl@H@@YAXH@Z"(i32 noundef %0)
  95
  96 template int __declspec(dllexport) variableTemplate<int>;
  97 // PCHWITHOBJVARS: @"??$variableTemplate@H@@3HA" = weak_odr dso_local dllexport global
  98
  99 // PR38934: Make sure S<int>::operator= gets emitted. While it itself isn't a
 100 // template specialization, its parent is.
 101 template struct __declspec(dllexport) pr38934::S<int>;
 102 // PCHWITHOBJ: define weak_odr dso_local dllexport x86_thiscallcc noundef nonnull align 1 dereferenceable(1) ptr @"??4?$S@H@pr38934@@QAEAAU01@ABU01@@Z"
 103
 104 #endif